Electromechanical

Abstract

The armature portion has a first armature core (H1), a second armature core (H2), and a core link portion (L) that magnetically couples the first armature core (H1) and the second armature core (H2). The first armature core (H1) has magnetically coupled pole groups (G1u, G1v). The second armature core (H2) has magnetically coupled pole groups (G2u, G2v). In the armature portion, a first magnetic flux (Φ1) and a second magnetic flux (Φ7) are formed by a magnet (Mg). A first magnetic path for the first magnetic flux (Φ1) includes the pole group (G1u), the pole group (G1v), the pole group (G2u), the pole group (G2v), an excitation core (22N, 22S), and the magnet (Mg). A second magnetic path for the second magnetic flux (Φ7) includes the pole group (G1u), the core link structure, the pole group (G2u), the excitation core (22N, 22S), and the magnet (Mg). Accordingly, it is possible to suppress magnetic saturation of the magnetic path formed in the armature portion, and in addition, it is possible to increase the strength of the armature core because it is not necessary to magnetically divide each armature core in the mechanical action direction.

Description

Technical Field

[0001] This invention relates to an electrical machine. Background Technology

[0002] In Patent Documents 1, 2, and 3, the stator core has multiple core portions arranged in the rotational direction, and multiple coils are respectively disposed in the multiple core portions. Each core portion has two plate-shaped portions opposed in the axial direction, and multiple magnetic poles protruding radially from each of the two plate-shaped portions. The two plate-shaped portions opposed in the axial direction are magnetically coupled, and a magnetic circuit is formed by the two plate-shaped portions and the magnet disposed on the rotor.

[0003] For example, in Patent Document 1, two stator plates 15 are axially opposed and magnetically coupled by a bridging core 10. Each stator plate 15 has radially protruding magnetic poles (claw poles 12, 13). In Patent Document 2, axially opposed pole plates 21, 25 are respectively formed with pole teeth 23, 27 opposite to the rotor. The pole plates 21, 25 are magnetically coupled by an axially extending pole core 22d. In Patent Document 3, the upper portion 2a and the lower portion 2b of the fixed core 2 are axially opposed, and each of the upper portion 2a and the lower portion 2b has protrusions 2c, 2d (magnetic poles). The upper portion 2a and the lower portion 2b are magnetically coupled by an axially extending stator powder core 1.

[0004] In previous technical documents

[0005] Patent documents

[0006] Patent Document 1: Japanese Patent Publication No. 2003-513599

[0007] Patent Document 2: Japanese Patent Application Publication No. 2007-306745

[0008] Patent Document 3: Japanese Patent Application Publication No. 2007-185087 Summary of the Invention

[0009] The problem that the invention aims to solve

[0010] In the structures disclosed in Patent Documents 1, 2, and 3, two axially opposed plates are magnetically coupled through their axially extending portions, thereby forming a closed magnetic circuit. With this type of magnetic circuit, miniaturizing the rotary motor narrows the magnetic path for forming the magnetic flux flowing from one plate to the other, making it prone to magnetic saturation. To avoid magnetic saturation, the current supplied to the coil must be kept low, making it difficult to obtain a large torque.

[0011] Methods for solving problems

[0012] An example of the electromechanical device proposed in this invention includes an armature portion and an excitation portion capable of relative movement with respect to the armature portion. The excitation portion includes: a plurality of excitation cores arranged in the relative movement direction between the armature portion and the excitation portion, i.e., the mechanical action direction, and a plurality of magnets respectively disposed between two adjacent excitation cores. The armature portion includes: a first armature core and a second armature core separated in a direction intersecting the mechanical action direction, a core-connecting structure magnetically coupling the first armature core and the second armature core, and a plurality of coils. The first armature core has a first pole group and a second pole group arranged and magnetically coupled in the mechanical action direction. The second armature core has a third pole group and a fourth pole group arranged and magnetically coupled in the mechanical action direction. The position of the first pole group in the mechanical action direction corresponds to the position of the third pole group in the mechanical action direction. The position of the second pole group in the mechanical action direction corresponds to the position of the fourth pole group in the mechanical action direction. The plurality of coils includes a first coil disposed in one of the first pole group and the third pole group. A first magnetic flux through the first coil and a second magnetic flux through the first coil are formed by one or more of the plurality of magnets. A first magnetic circuit for the first magnetic flux includes a first magnetic pole group, a second magnetic pole group, a third magnetic pole group, a fourth magnetic pole group, an excitation core, and the magnet. A second magnetic circuit for the second magnetic flux includes the first magnetic pole group, the core-connection structure, the third magnetic pole group, the excitation core, and the magnet. According to this electromechanical design, magnetic saturation of the magnetic circuit can be suppressed. As a result, the current supplied to the coil can be increased, thereby enabling the acquisition of greater power from the electromechanical design. Furthermore, since it is not necessary to magnetically divide each armature core in the direction of mechanical action, the strength of the armature core can be increased.

[0013] (1) In one example of the electromechanical device, the excitation section may have a first surface along the mechanical operation direction. The first armature core and the second armature core may be located in a first direction intersecting the mechanical operation direction with respect to the first surface of the excitation section. The core connection structure includes a plurality of core connection portions arranged in the mechanical operation direction. The plurality of core connection portions may include core connection portions located in the first direction relative to the first magnetic pole group, the third magnetic pole group, and the first coil.

[0014] (2) In another example of the electromechanical device, the excitation unit may have a first surface and a second surface along the mechanical direction of operation. The first armature core may be located in a first direction intersecting the mechanical direction of operation relative to the first surface of the excitation unit. The second armature core may be located in a second direction intersecting the mechanical direction of operation relative to the second surface of the excitation unit.

[0015] (3) In the electrical machinery of (1), at least one of the first and second armature cores may comprise a stacked steel plate of multiple steel plates, having a plurality of fitting holes into which the plurality of core connecting portions are respectively inserted in the stacking direction of the steel plates. Alternatively, in the at least one armature core, a slit extending from the fitting hole in a direction intersecting the stacking direction of the steel plates, or an opening opening in a direction intersecting the stacking direction of the steel plates, may be formed for each of the plurality of fitting holes. Accordingly, induced currents generated around each core connecting portion can be suppressed.

[0016] (4) In the electromechanical system of (1) or (3), the excitation section may be able to rotate relative to the armature section about an axis. Alternatively, at least one of the first and second armature cores may comprise a stack of steel plates, having multiple fitting holes into which the multiple core connecting sections are respectively inserted in the stacking direction of the steel plates. A slit may also be formed in the at least one armature core, intersecting a closed curve that passes through the multiple fitting holes and between the multiple magnetic pole groups arranged in the mechanical action direction, and surrounds the axis. This allows for the suppression of induced current in the armature core in the rotational direction.

[0017] (5) In the electrical machinery of (2), the core connection structure may also include a plurality of core connections arranged in the direction of mechanical action. Alternatively, at least one of the first armature core and the second armature core may comprise a stacked steel plate of multiple steel plates, having a plurality of fitting holes into which the plurality of core connections are respectively inserted in the stacking direction of the steel plates. Alternatively, in the at least one armature core, a slit extending from the fitting hole in a direction intersecting the stacking direction of the steel plates, or an opening opening in a direction intersecting the stacking direction of the steel plates, may be formed for each of the plurality of fitting holes. Accordingly, induced currents generated around each core connection can be suppressed.

[0018] (6) In the electromechanical system of (2) or (5), the excitation section may be able to rotate relative to the armature section about an axis. Alternatively, the core-connecting structure may include a plurality of core-connecting sections arranged in the mechanical action direction. Alternatively, at least one of the first and second armature cores may comprise a stacked steel plate of multiple steel plates, having a plurality of fitting holes into which the plurality of core-connecting sections are respectively inserted in the stacking direction of the steel plates. A slit may also be formed in the at least one armature core, intersecting a closed curve that passes through the plurality of fitting holes and between the plurality of magnetic pole groups arranged in the mechanical action direction and surrounds the axis. Accordingly, induced current in the rotational direction of the armature core can be suppressed.

[0019] (7) In the electrical machinery of (1) or (2), the core connection structure may also be integrally formed with one of the first armature core and the second armature core. Accordingly, the assembly of the armature portion can be simplified.

[0020] (8) The electrical machinery of any one of (2), (5), and (6) may also include a core-connecting structure comprising a plurality of core-connecting portions arranged in the mechanical action direction. The first armature core has a first yoke portion, and the first magnetic pole group and the second magnetic pole group are formed on the excitation portion side of the first magnetic yoke portion. The second armature core has a second magnetic yoke portion, and the third magnetic pole group and the fourth magnetic pole group are formed on the excitation portion side of the second magnetic yoke portion. The plurality of core-connecting portions may include core-connecting portions that magnetically couple the first magnetic yoke portion and the second magnetic yoke portion and are disposed at positions corresponding to the positions of the first magnetic pole group and the third magnetic pole group in the mechanical action direction.

[0021] (9) In any of the electrical machinery described in (1) to (8), each of the first magnetic pole group, the second magnetic pole group, the third magnetic pole group, and the fourth magnetic pole group may include a plurality of magnetic poles arranged in the direction of mechanical action. Accordingly, the power output of the electrical machinery can be increased.

[0022] (10) In the electrical machinery of (9), each of the plurality of magnetic poles may have a shape that protrudes toward the excitation part.

[0023] (11) In the electromechanical apparatus of (9), each of the plurality of magnetic poles may include: a body having a shape protruding toward the excitation section, and a protrusion extending from the body in a direction intersecting with the direction of mechanical action. Accordingly, the magnetic resistance caused by the gap between the excitation section and the magnetic poles can be reduced.

[0024] (12) In any of the electrical machines in (1) to (11),

[0025] The number of phases of the electrical machinery is an odd number of 3 or more.

[0026] The armature section includes one coil or two or more coils with the same winding direction for each phase.

[0027] The first magnetic pole group and the third magnetic pole group form a first magnetic pole pair, and the second magnetic pole group and the fourth magnetic pole group form a second magnetic pole pair.

[0028] The coil is provided in each of the first and second magnetic pole pairs. When the polarities are the same and the angle between two adjacent excitation cores is 360 degrees in electrical degrees, the first and second magnetic pole pairs are substantially separated by "360×(n+m / s)" degrees in electrical degrees. Here, s, m, and n represent the following numbers respectively:

[0029] s: Phase number;

[0030] m: an integer greater than 1 and less than s-1 (excluding divisors of s (excluding 1) and multiples of divisors of s (excluding 1);

[0031] n: An integer greater than or equal to 1.

[0032] (13) In the electrical machinery of (12),

[0033] The excitation section and the armature section are capable of relative rotation.

[0034] When (number of poles of the excitation section) / 2 is set to p, and the number of coils for each phase is set to c, "(360 / p)×(n+m / s)" is essentially equal to "360 / s / c".

[0035] (14) In any of the electrical machines in (1) to (11), the number of phases of the electrical machine is an odd number of 3 or more.

[0036] The armature section includes, for each phase, a coil pair consisting of two coils with different winding directions.

[0037] The first armature core has a first magnetic pole group, a second magnetic pole group, and a fifth magnetic pole group.

[0038] The second armature core has the third pole group, the fourth pole group, and the sixth pole group.

[0039] The first magnetic pole group and the third magnetic pole group constitute a first magnetic pole pair.

[0040] The second magnetic pole group and the fourth magnetic pole group constitute a second magnetic pole pair.

[0041] The fifth magnetic pole group and the sixth magnetic pole group constitute the third magnetic pole pair.

[0042] The winding direction of the coil in the first magnetic pole pair is the same as that of the coil in the second magnetic pole pair. The coil in the first magnetic pole pair and the coil in the third magnetic pole pair constitute the coil pair.

[0043] When the polarities are the same and the angle between two adjacent excitation cores is 360 degrees in electrical degrees, (i) the first pole pair and the second pole pair are substantially separated by "360×(n+m / s)" degrees in electrical degrees, and (ii) the first pole pair and the third pole pair are substantially separated by "360×(q+1 / 2)" degrees in electrical degrees. Here, s, m, n, and q represent the following numbers:

[0044] s: Phase number;

[0045] m: an integer greater than 1 and less than s-1 (excluding divisors of s (excluding 1) and multiples of divisors of s (excluding 1);

[0046] n: an integer greater than or equal to 1;

[0047] q: An integer greater than or equal to 1.

[0048] (15) In the electromechanical system of (14), the excitation unit and the armature unit are capable of relative rotation.

[0049] When (number of poles of the excitation section) / 2 is set as p, and the number of coil pairs for each phase is set as c, "(360 / p)×(n+m / s)" is essentially equal to "360 / s / c".

[0050] (16) In any of the electrical machines in (1) to (11),

[0051] The number of phases of the electrical machinery is an even number of two or more.

[0052] The armature section includes, for each phase, a coil pair consisting of two coils with different winding directions.

[0053] The first armature core has a first magnetic pole group, a second magnetic pole group, and a fifth magnetic pole group; the second armature core has a third magnetic pole group, a fourth magnetic pole group, and a sixth magnetic pole group; the first magnetic pole group and the third magnetic pole group constitute a first magnetic pole pair.

[0054] The second magnetic pole group and the fourth magnetic pole group constitute a second magnetic pole pair.

[0055] The fifth magnetic pole group and the sixth magnetic pole group constitute the third magnetic pole pair.

[0056] The winding direction of the coil of the first magnetic pole pair is the same as that of the coil of the second magnetic pole pair, and the coil of the first magnetic pole pair and the coil of the third magnetic pole pair constitute the coil pair.

[0057] When the polarities are the same and the angle between two adjacent excitation cores is 360 degrees in electrical degrees, (i) the first pole pair and the twelfth pole pair are substantially separated by "360×(n+m / s / 2)" degrees in electrical degrees, and (ii) the first pole pair and the third pole pair are substantially separated by "360×(q+1 / 2)" degrees in electrical degrees. Here, s, m, n, and q represent the following numbers:

[0058] s: Phase number;

[0059] m: an integer greater than 1 and less than s-1 (excluding divisors of s (excluding 1) and multiples of divisors of s (excluding 1);

[0060] n: an integer greater than or equal to 1;

[0061] q: An integer greater than or equal to 1.

[0062] (17) In the electromechanical system of (16), the excitation unit and the armature unit are capable of relative rotation.

[0063] When (number of poles of the excitation section) / 2 is set as p, and the number of coil pairs for each phase is set as c, "(360 / p)×(n+m / s / 2)" is essentially equal to "180 / s / c".

[0064] (18) In any of the electromechanical devices described in (1) to (17), each of the plurality of magnets may be magnetized in the direction of mechanical action, and each of the plurality of excitation cores may include two partial excitation cores disposed between two adjacent magnets and separated in the direction of mechanical action. Accordingly, the accumulation of dimensional errors between the excitation cores and the magnets can be suppressed, thereby improving the positional accuracy of the excitation cores and the magnets. Attached Figure Description

[0065] Figure 1A This is a perspective view showing a first example of a rotating electric motor, which is one of the electrical machines proposed in this invention.

[0066] Figure 1B This is an exploded 3D view of the first example of a rotating electric motor.

[0067] Figure 1C This is a top view of the first example of a rotating electric motor, showing the second armature core.

[0068] Figure 1DThis is a top view of the first example of a rotating electric motor, showing a partial fracture of the second armature core and revealing the first armature core.

[0069] Figure 1E This is a cross-sectional view of the first example of a rotating electric motor.

[0070] Figure 2 This is a unfolded diagram showing the position of the magnetic poles in the armature of the first example of a rotating electric machine.

[0071] Figure 3A This diagram is used to illustrate the positional relationship between the excitation core of the excitation section and the magnetic poles of the armature section.

[0072] Figure 3B It indicates observing in the direction of the arrow. Figure 3A The diagram shows the magnetic flux flow patterns of the magnet obtained from sections A, B, C, D, and E.

[0073] Figure 4 This diagram illustrates the construction used to prevent induced current from being generated in the armature core.

[0074] Figure 5 This is a cross-sectional view used to illustrate the construction for preventing induced current in the armature core.

[0075] Figure 6 This diagram illustrates the generation of induced current, showing a schematic cross-section of the armature core and the core connection. It also shows the magnetic flux flowing in the magnetic circuit including the core connection.

[0076] Figure 7 This is a 3D view of the rotating electric motor in the second example.

[0077] Figure 8 This diagram illustrates the generation of induced current, showing a closed circuit that surrounds the entire first armature core.

[0078] Figure 9A It is used to prevent Figure 8 The diagram illustrates the slit generated by the induced current. Figure 7 The plane of the first armature core is shown.

[0079] Figure 9B It means Figure 8 The diagram shows an example of a change in the first armature core.

[0080] Figure 10 This is a perspective view of the third example of a rotating electric motor, with an armature portion arranged outside the excitation portion.

[0081] Figure 11 This is a perspective view of the fourth example of a rotating electric motor. The armature core is formed of a soft magnetic powder material.

[0082] Figure 12A This is a perspective view of the fifth example of a rotating electric motor, with multiple core connecting parts provided in each pair of magnetic poles.

[0083] Figure 12B yes Figure 12A A top view of the armature core of the rotary electric machine shown.

[0084] Figure 13A This is an exploded perspective view of the rotating electric motor in the sixth example, where the armature core is composed of a partial armature core.

[0085] Figure 13B It constitutes Figure 13A A top view of the first armature core H1 of the armature section shown.

[0086] Figure 14A This is an exploded perspective view of the rotating electric machine in the seventh example. The armature section has two coils with opposite winding directions for each phase.

[0087] Figure 14B It means Figure 14A The diagram shows the unfolded position of the magnetic poles in the armature section.

[0088] Figure 15A This is an exploded perspective view of the rotating electric machine in the eighth example. The number of phases of the alternating current supplied to the rotating electric machine is even.

[0089] Figure 15B It means Figure 15A The diagram shows the unfolded position of the magnetic poles in the armature section.

[0090] Figure 16 This is a cross-sectional view showing an example of the excitation section.

[0091] Figure 17 The ninth example is a perspective view illustrating a linear motor in which the armature and excitation parts can move relative to each other in a straight line.

[0092] Figure 18A This is a perspective view of the tenth example of an electrical machine, showing a radially spaced rotary motor with two armature cores located on opposite sides of each other, separated by an excitation section.

[0093] Figure 18B yes Figure 18A The diagram shown is an exploded perspective view of the rotary electric motor.

[0094] Figure 18C It indicates that it was formed in Figure 18A The diagram shows the magnetic flux of the rotating electric motor.

[0095] Figure 19 yes Figure 18A An example of a variation in the mounting structure of the core connector provided on the rotary electric machine is shown.

[0096] Figure 20 It means Figure 18A The diagram shows a cross-sectional view of an example of the excitation section of a rotary electric machine. This cross-section is orthogonal to the axis.

[0097] Figure 21A This is a perspective view of the eleventh example of an electrical machine, showing a linear motor with two armature cores located on opposite sides of each other, separated by an excitation section.

[0098] Figure 21B yes Figure 21A The diagram shows an exploded 3D view of a linear motor.

[0099] Figure 22 It is a three-dimensional diagram of an armature core including a magnetic pole with protrusions.

[0100] Figure 23 This is a perspective view of the electrical machinery in the twelfth example, showing a linear motor containing an armature core with a yoke portion core and a pole core.

[0101] Figure 24A This is a perspective view of the electrical machinery in the thirteenth example, showing a linear motor with an armature core formed of soft magnetic powder material.

[0102] Figure 24B yes Figure 24A The diagram shows an exploded 3D view of a linear motor.

[0103] Figure 25A This is a perspective view of the electrical machinery in the fourteenth example, showing an axially spaced rotary motor with two armature cores arranged on opposite sides of the excitation section.

[0104] Figure 25B yes Figure 25A The diagram shown is an exploded perspective view of the rotary electric motor.

[0105] Figure 25C yes Figure 25A The image shows a bottom view of the rotary electric motor.

[0106] Figure 26A This is a perspective view of the electrical machinery in the fifteenth example, showing a rotary motor in which the armature core is arranged in two different directions relative to the excitation section.

[0107] Figure 26B yes Figure 26A The diagram shown is an exploded perspective view of the rotary electric motor.

[0108] Figure 27AThis is a perspective view of the sixteenth example of an electrical machine, showing a rotary motor with an axial clearance type having one core connection portion extending in the direction of mechanical action, as a core connection structure that magnetically couples the yoke portions of two armature cores.

[0109] Figure 27B yes Figure 27A The diagram shown is an exploded perspective view of the rotary electric motor. Detailed Implementation

[0110] The embodiments of the electrical machinery proposed in this invention will be described below. In this specification, the electrical machinery includes, for example, a rotary motor or a linear motor that functions as an electric motor or generator. The rotary motor includes radially backlash type and axially backlash type. In the radially backlash type, the armature and excitation part face each other radially, and in the axially backlash type, the armature and excitation part face each other axially.

[0111] In this specification, it will be along Figure 1A The direction of the axis Ax (a straight line passing through the center of rotation) of the rotary electric motor shown is called the "axial direction," and the direction of rotation of the rotary electric motor M1 centered on the axis Ax is simply referred to as the "rotation direction." Furthermore, in this specification, "rotation direction" and "axial direction" refer to the "actual rotation direction" and "actual axial direction," respectively. Therefore, for example, the explanation that the magnetization direction of the magnet is the rotation direction, and the explanation that the stacking direction of the steel plates constituting the excitation core is the rotation direction, means that the magnetization direction and the stacking direction include the tangential direction of the circle centered on the axis Ax. Furthermore, in this specification, "mechanical movement direction" refers to the rotation direction of the movable part (armature or excitation part) in a rotary electric motor, and the direction of movement of the movable part (armature or excitation part) in a linear electric motor. Furthermore, in a rotary electric motor, one of the directions intersecting the mechanical movement direction is the axial direction, and the other direction is the radial direction of the rotary electric motor. Furthermore, in a linear electric motor, if the mechanical movement direction is set as, for example, the left-right direction, then one of the directions intersecting the mechanical movement direction is the front-back direction, and the other direction is the up-down direction. Furthermore, in linear motors, the direction intersecting the mechanical motion direction also includes the direction that is orthogonal to the mechanical motion direction and inclined relative to both the front-back direction and the up-down direction.

[0112] Furthermore, in this specification, "mechanical angle" is the angle expressed based on one full rotation of axis Ax when one rotation around axis Ax is set to 360 degrees in a rotary electric motor. In contrast, "electrical angle" is the angle (distance) expressed based on the angle between two adjacent excitation cores (e.g., excitation core 22N hereinafter referred to as excitation cores) having the same polarity and in the direction of electromechanical mechanical action (i.e., the relative movement direction of the excitation section and the armature section) in a rotary or linear electric motor when the angle (or distance) between the two excitation cores is set to 360 degrees.

[0113] (Basic Structure)

[0114] right Figure 1A The radial clearance type rotary motor M1, as illustrated in the example, will be explained. Figure 1A As shown, the rotary electric motor M1 has an excitation section Fs and an armature section Am1 that can rotate relative to each other (in... Figure 1A (Part of the rotation direction of the excitation section Fs is not shown in the diagram). For example, the excitation section Fs is a rotor, and the armature section Am1 is a stator. The excitation section Fs is rotatably supported in the device for mounting the rotary motor M1, and the armature section Am1 is fixed to the structure of the device for mounting the rotary motor M1. For example, when the rotary motor M1 is mounted in an electric vehicle (two-wheeled vehicle or four-wheeled vehicle, etc.), the excitation section Fs is rotatably supported and connected to the wheel. On the other hand, the armature section Am1 is fixed to the vehicle frame, for example. Alternatively, the armature section Am1 may be a rotor, and the excitation section Fs may be a stator. When the armature section Am1 is a rotor, current can be supplied to the coil CL provided in the armature section Am1 through brushes and slip rings, or brushes and commutators, etc.

[0115] (Overview of the excitation section)

[0116] In the rotary electric motor M1, the excitation section Fs is arranged to surround the outside of the armature section Am1. For example... Figure 1A As shown, the excitation section Fs has a plurality of excitation cores 22N and 22S arranged in the rotation direction, and a plurality of permanent magnets Mg each disposed between two adjacent excitation cores. Figure 3B In the diagram, the magnetization direction of the magnet Mg is indicated by arrows. The magnet surface in the direction indicated by the arrow is the N pole, and the magnet surface opposite to the N pole is the S pole. For example... Figure 3B As shown, magnet Mg is magnetized in the direction of rotation (mechanical action direction) of the rotary motor M1. In this specification, "magnet Mg is magnetized in the direction of rotation of the rotary motor M1" means that the direction of magnetization includes the tangential direction of the circle at the position of magnet Mg (the circle centered on the axis Ax of the rotary motor). The magnetization directions of two adjacent magnets Mg are opposite, and the magnet surfaces of two adjacent magnets Mg with the same polarity face each other. Excitation core 22N is located between the N pole surfaces of two adjacent magnets Mg, and excitation core 22S is located between the S pole surfaces of two adjacent magnets Mg. Excitation cores 22N and 22S can be constructed, for example, from laminated steel plates, pressed powder materials, or combinations thereof. Excitation cores 22N and 22S have a magnetic collecting effect, collecting the magnetic flux of the entire surface of magnet Mg and guiding it to armature section Am1. Thus, the magnetic flux based on magnet Mg can be used effectively.

[0117] (Armature section)

[0118] like Figure 1A As shown, the armature portion Am1 has a plurality of armature cores H1, H2 arranged axially, and a core coupling structure for magnetically coupling the plurality of armature cores H1, H2. The core coupling structure may have a plurality of core connecting portions L arranged at intervals in the mechanical action direction.

[0119] The armature section Am1, for example, has one first armature core H1 and two second armature cores H2. The first armature core H1 is disposed between the two second armature cores H2. The shapes and dimensions of the armature cores H1 and H2 may be different from each other. In the rotary motor M1, coils Clu, CLv, and CLw are provided in the first armature core H1 (see reference). Figure 1B No coil is provided in the second armature core H2. Furthermore, the thickness (axial width) of the first armature core H1 is greater than the thickness (axial width) of the second armature core H2. This prevents the density of magnetic flux flowing through the first armature core H1 from becoming excessive. (Hereinafter, in descriptions without distinguishing between coil types, the symbol "CL" will be used for coils.)

[0120] Furthermore, the number or configuration of armature cores is not limited to the example of the rotary motor M1. The shapes of armature cores H1 and H2 can also be identical. In this way, the number of parts for armature cores H1 and H2 can be reduced, or the number of molds can be reduced. In addition, the armature cores in the armature section can also be, for example, only one first armature core H1 and one second armature core H2.

[0121] (First armature core)

[0122] like Figure 1B As shown, the first armature core H1 has multiple magnetic pole groups G1u, G1v, and G1w arranged in the rotation direction. (Hereinafter, in the description without distinguishing between the three magnetic pole groups G1u, G1v, and G1w, the magnetic pole group is referred to as G1.) Each magnetic pole group G1 has multiple magnetic poles 33a arranged in the rotation direction (see reference). Figure 1A The number of magnetic poles 33a in each magnetic pole group G1 is preferably two or more. In the rotary electric machine M1, each magnetic pole group G1 consists of five magnetic poles 33a. The magnetic pole 33a is a protrusion formed on the surface of the first armature core H1 facing the excitation section Fs. That is, the magnetic pole 33a is a portion having a radially protruding shape. Adjacent magnetic poles 33a are separated from each other in the rotational direction. The magnetic flux flowing between the excitation section Fs and the first armature core H1 is concentrated through this magnetic pole 33a.

[0123] The first armature core H1 has a ring-shaped magnetic yoke 33c centered on the axis Ax (see reference). Figure 1B ).like Figure 3B As shown, the first armature core H1 may have a common base 33b to which the multiple magnetic poles 33a constituting each magnetic pole group G1 are connected (see reference). Figure 3B The common base 33b may extend from the yoke 33c toward the excitation part Fs, and the magnetic poles 33a may protrude from the common base 33b toward the excitation part Fs. The first armature core H1 may also not have a common base 33b. In this case, the multiple magnetic poles 33a may be directly connected to the annular portion of the yoke 33c.

[0124] As described below, in the first armature core H1, magnetic fluxes Φ1 and Φ2 flowing between the magnetic pole groups G1 arranged in the rotational direction and magnetic flux Φ7 flowing towards the core connection portion L are formed (refer to...). Figure 3B In the second armature core H2, magnetic fluxes Φ1 and Φ2 flowing between the magnetic pole groups G2 arranged in the rotational direction and magnetic flux Φ7 flowing towards the core connection L are formed (refer to...). Figure 3B The coil CL is configured in the first armature core H1 such that these magnetic fluxes Φ1, Φ2, and Φ7 pass through the inside of the coil CL. Specifically, as... Figure 1B As shown, coil CL is disposed in pole group G1 and wound around the multiple magnetic poles 33a constituting pole group G1. With this configuration of coil CL, the magnetic flux generated by magnet Mg efficiently intersects with coil CL. Furthermore, the configuration of coil CL is not limited to the example of armature section Am1. As long as the magnetic fluxes Φ1, Φ2, and Φ7 pass through the inner side of coil CL, multiple coils CL can be configured either in the second armature core H2 or in both the first armature core H1 and the second armature core H2.

[0125] Rotary motor M1 is a rotary motor driven by AC. For example, three-phase AC is supplied to rotary motor M1. Therefore, the first armature core H1 is as follows: Figure 1B As shown, the device has a U-phase coil CLu, a V-phase coil CLv, and a W-phase coil CLw. The U-phase coil CLu, V-phase coil CLv, and W-phase coil CLw are respectively located in the pole groups G1u, G1v, and G1w. In the rotary motor M1, two coils CL are provided for each phase. When the rotary motor M1 is viewed axially, the coils CLu, CLv, and CLw are arranged in the direction of rotation. This allows for the balance of the magnetic forces acting on the armature section Am1 and the excitation section Fs. Furthermore, the number of coils CL provided for each phase can be either more than two or one.

[0126] Furthermore, each pole group G1 may also have an outer coil and an inner coil disposed inside the outer coil. For example, in the U-phase pole group G1u, an outer coil may be provided that surrounds all the poles 33a (5 poles 33a) constituting the pole group G1u, and an inner coil may be provided that surrounds only a portion of the poles 33a (the three poles 33a in the very center). According to this configuration, the space between two adjacent poles 33a can be effectively utilized, thereby enabling the miniaturization of the rotary motor. This configuration can be applied to any of the radial clearance type rotary motors, axial clearance type rotary motors, and linear motors described below.

[0127] like Figure 2 As shown, in the rotary motor M1, the winding direction of the multiple coils CL set for each phase is the same. Figure 2 In the diagram, the arrows for coil CL indicate the winding direction of the coil. The winding direction corresponds to the direction of the current supplied to coil CL by a converter (not shown). When the current direction is positive, the current flows in the direction of the arrow. When the current direction is negative, the current flows in the opposite direction to the arrow. Furthermore, the position, number, and winding direction of coil CL are not limited to the example of the rotating motor M1. For example, the number of coils for each phase can be one or more than three. Additionally, the number of phases can be an odd number (3 or more), such as 5 or 7, or an even number (2 or more). Examples of variations in the position, number, and winding direction of the coils will be explained in detail later.

[0128] (Second armature core)

[0129] like Figure 1B as well as Figure 2 As shown, the second armature core H2 has multiple pole groups G2u, G2v, and G2w arranged in the rotational direction. (Hereinafter, in the description without distinguishing between the three pole groups G2u, G2v, and G2w, the pole group is referred to as G2.) Each pole group G2 is composed of multiple poles 34a arranged in the rotational direction. The number of poles 34a in each pole group G2 is preferably two or more. In the rotary motor M1, each pole group G2 is composed of six poles 34a. Figure 1B As shown, magnetic pole 34a is a protrusion formed on the surface of the second armature core H2 facing the excitation section Fs. In the rotary electric machine M1, magnetic pole 34a is a radially protruding portion. The second armature core H2 has an annular yoke portion 34c centered on the axis Ax, and magnetic pole 34a protrudes from the yoke portion 34c toward the excitation section Fs. Adjacent magnetic poles 34a are separated from each other in the rotational direction. The magnetic flux flowing between the excitation section Fs and the second armature core H2 is concentrated through this magnetic pole 34a.

[0130] like Figure 1A as well as Figure 1BAs shown, in the rotary motor M1, the three pole groups G2u, G2v, and G2w of the second armature core H2 are located axially (relative to the direction of intersection with the direction of mechanical action) relative to the three pole groups G1u, G1v, and G1w of the first armature core H1. As described above, the rotary motor M1 has two second armature cores H2, and each pole group G1 is located between two axially separated pole groups G2.

[0131] Because the distance between the excitation section Fs and the armature cores H1 and H2 is small, most of the magnetic flux will move between the armature cores H1 and H2 and the excitation section Fs through the magnetic poles 33a and 34a. The shapes of the magnetic poles 33a and 34a can be appropriately modified to achieve this function. For example, the leading edge face of the magnetic pole 33a... Figure 1A The curved surface in the middle is along the inner circumferential surface of the excitation section Fs, but it can also be a curved surface with a larger curvature than the inner circumferential surface of the excitation section Fs. In this way, the cogging torque can be reduced. In addition, the groove (recess) between two adjacent magnetic poles 33a can be U-shaped or substantially rectangular. As another example, the corners of the front end face of the magnetic pole 33a can be chamfered or the corners of the front end face of the magnetic pole 33a can be rounded. The magnetic pole 34a of the second armature core H2 can also have the same shape as the magnetic pole 33a described here.

[0132] (Position of the magnetic poles)

[0133] The positions of the magnetic pole 33a of the first armature core H1 and the magnetic pole 34a of the second armature core H2 are offset in the rotational direction. For example... Figure 2 As shown, the position of magnetic pole 33a in the rotation direction is between two adjacent magnetic poles 34a in the rotation direction. Furthermore, the position of magnetic pole 34a in the rotation direction is between two adjacent magnetic poles 33a in the rotation direction.

[0134] like Figure 2 As shown, the position of magnetic pole 33a is, for example, the middle of two adjacent magnetic poles 34a, and the position of magnetic pole 34a is, for example, the middle of two adjacent magnetic poles 33a. Figure 2The values ​​shown are expressed in electrical degrees, representing angles (distances) in the direction of rotation. In the rotary motor M1, two adjacent magnetic poles 33a in the direction of rotation are 360 ​​degrees apart in electrical degrees, and the positions of magnetic poles 33a and 34a in the direction of rotation are 180 degrees apart in electrical degrees. The relative positions of magnetic poles 33a and 34a are not limited to these. The angles (distances) between magnetic poles 33a and 34a in the direction of rotation can be slightly less than 180 degrees or slightly greater than 180 degrees. The angles (distances) between magnetic poles 33a and 34a can be 175 degrees or 185 degrees in electrical degrees. Furthermore, the angles (distances) between magnetic poles 33a and 34a in the direction of rotation can gradually decrease or increase as they approach the ends of the magnetic pole groups G1 and G2 in the direction of rotation.

[0135] (Positional relationship between the excitation core and the magnetic poles)

[0136] When the excitation unit Fs is fixed in a certain position, the magnet Mg, the excitation cores 22N and 22S, and the magnetic poles 33a and 34a have the following positional relationship.

[0137] like Figure 3B As shown, the positions of the magnetic poles 33a and 34a of the armature cores H1 and H2 in the direction of rotation correspond to the positions of the excitation cores 22N and 22S in the direction of rotation, respectively. For example, each magnetic pole 33a is opposite to the excitation core 22N (or 22S) and forms a magnetic circuit with it. Similarly, each magnetic pole 34a is opposite to the excitation core 22S (or 22N) and forms a magnetic circuit with it. Figure 3B The figure shows the magnetic fluxes Φ1, Φ2, and Φ7 flowing through the magnetic circuit.

[0138] exist Figure 3BIn the illustrated state, the excitation core 22N is positioned opposite to the pole 33a of pole group G1u, and the excitation core 22S is positioned opposite to the pole 34a of pole group G2u. In this state, excitation core 22S is opposite to the pole 33a of pole groups G1v and G1w, and excitation core 22N is opposite to the pole 34a of pole groups G2v and G2w. Although the position of excitation core 22S in the rotational direction is offset from the position of pole 33a of pole groups G1v and G1w, magnetic flux flow between excitation core 22S and pole 33a of pole groups G1v and G1w is permitted. Similarly, although the position of excitation core 22N in the rotational direction is offset from the pole 34a of pole groups G2v and G2w, magnetic flux flow between excitation core 22N and pole 34a of pole groups G2v and G2w is permitted. Based on this positional relationship, the following closed magnetic circuit is formed. In the state illustrated in Figure 3, the position of the excitation core 22S is offset by 60 degrees from the position of the magnetic pole 33a of the magnetic pole group G1v and G1w by an electric angle, and the position of the excitation core 22N is offset by 60 degrees from the position of the magnetic pole 34a of the magnetic pole group G2v and G2w by an electric angle.

[0139] The positions of the magnetic pole groups G1 and G2 in the rotational direction, and the positions of the excitation cores 22N and 22S, are described in detail. In this description, the pairing of the axially arranged magnetic pole groups G1u and G2u is referred to as the magnetic pole pair Pu (see reference). Figure 2 The pair of magnetic pole groups G1v and G2v arranged axially is called magnetic pole pair Pv (refer to...). Figure 2 The pair of magnetic pole groups G1w and G2w arranged axially is called magnetic pole pair Pw (refer to...). Figure 2 In the following description, without distinguishing between these three pole pairs Pu, Pv, and Pw, the pole pair will be referred to by the symbol P.

[0140] The number of magnetic poles 33a and 34a is the same in the multiple pole pairs Pu, Pv, and Pw. That is, the number of magnetic poles 33a in each pole pair G1u, G1v, and G1w of the first armature core H1 is the same, for example, 5. Furthermore, the number of magnetic poles 34a in each pole pair G2u, G2v, and G2w of the second armature core H2 is also the same, for example, 6. The spacing of magnetic poles 33a and 34a is also substantially the same in the multiple pole pairs Pu, Pv, and Pw. That is, the spacing of magnetic poles 33a (the distance between two adjacent magnetic poles 33a) is substantially the same in the three pole pairs G1u, G1v, and G1w of the first armature core H1, and the spacing of magnetic poles 34a (the distance between two adjacent magnetic poles 34a) is substantially the same in the three pole pairs G2u, G2v, and G2w of the second armature core H2. Furthermore, the spacing between two adjacent magnetic poles 33a in each magnetic pole group G1 does not need to be the same; this spacing can also be non-uniform. In this case, the construction of multiple magnetic pole groups G1 is also the same. That is, each of the multiple magnetic pole groups G1 has multiple magnetic poles 33a arranged at non-uniform intervals, and the spacing between the magnetic poles 33a of one magnetic pole group G1 is the same as that of another magnetic pole group G1. Similarly, the spacing between two adjacent magnetic poles 34a in each magnetic pole group G2 does not need to be the same; this spacing can also be non-uniform. In this case, the construction of multiple magnetic pole groups G2 is also the same. That is, each of the multiple magnetic pole groups G2 has magnetic poles 34a arranged at non-uniform intervals, and the spacing between the magnetic poles 34a of one magnetic pole group G2 is the same as that of another magnetic pole group G2.

[0141] Ideally, the width and / or height of magnetic poles 33a and 34a should also be substantially the same in the multiple magnetic pole pairs Pu, Pv, and Pw. That is, the width of magnetic pole 33a in the rotational direction and / or the height of magnetic pole 33a in the axial direction are substantially the same in the three magnetic pole pairs G1u, G1v, and G1w of the first armature core H1. The width of magnetic pole 34a in the rotational direction and / or the height of magnetic pole 34a in the axial direction are substantially the same in the three magnetic pole pairs G2u, G2v, and G2w of the second armature core H2. That is, the three magnetic pole pairs Pu, Pv, and Pw have the same structure. Therefore, ideally, rotating one magnetic pole pair (e.g., Pu) around axis Ax will result in another magnetic pole pair P (e.g., Pv, Pw).

[0142] Furthermore, the width and / or height of the plurality of magnetic poles 33a constituting each magnetic pole group G1 may also be non-uniform. In this case, the plurality of magnetic pole groups G1u, G1v, and G1w have the same structure. That is, each of the plurality of magnetic pole groups G1u, G1v, and G1w is composed of a plurality of magnetic poles 33a having non-uniform widths and / or non-uniform heights. Similarly, the width and / or height of the plurality of magnetic poles 34a constituting each magnetic pole group G2 may also be non-uniform. In this case, the plurality of magnetic pole groups G2u, G2v, and G2w have the same structure. That is, each of the plurality of magnetic pole groups G2 is composed of a plurality of magnetic poles 34a having non-uniform widths and / or non-uniform heights.

[0143] like Figure 2 As shown, the angle between two adjacent magnetic pole pairs P is essentially “360×(n+m / s)” degrees in electrical angle measurement.

[0144] s: Phase number

[0145] m: an integer greater than 1 and less than s-1 (excluding divisors of s (excluding 1) and multiples of divisors of s (excluding 1)).

[0146] n: an integer greater than or equal to 1

[0147] Therefore, there exists a difference of (360 × m / s) degrees in electrical degrees between the magnetic pole 33a (or 34a) of the magnetic pole pair Pu and the excitation core 22N (or 22S) and the magnetic pole 33a (or 34a) of the other magnetic pole pair Pv, Pw and the excitation core 22N (or 22S). In the rotating motor M1, s = 3, n = 6, m = 1. Therefore, the angle between two adjacent magnetic pole pairs P is 2,280 degrees in electrical degrees. Thus, for example, when the magnetic pole 33a of the magnetic pole pair Pu is directly opposite the excitation core 22N (when the angle (distance) between the magnetic pole 33a and the excitation core 22N is 0 degrees), the position of the magnetic pole 33a of the magnetic pole pair Pv, Pw is offset by 120 degrees in electrical degrees relative to the excitation core 22N. The relative position of this type of magnetic pole pair P and excitation part Fs can also be applied to linear motors and axial clearance type rotary motors.

[0148] In this explanation, the angle (distance) between two pole pairs P specifically refers to the angle (distance) between the centers of pole pairs G1 in the direction of rotation, or the angle (distance) between the centers of pole pairs G2 in the direction of rotation. The angle (distance) between the centers of pole pairs G1 is, for example, the distance between the centers of pole pairs G1u and G1v in the direction of rotation. Similarly, the angle (distance) between the centers of pole pairs G2 is, for example, the distance between the centers of pole pairs G2u and G2v in the direction of rotation.

[0149] Furthermore, ensure that the mechanical angle between two adjacent magnetic pole pairs relative to P is "(360 / p)×(n+m / s)" degrees. Additionally, the angle between two adjacent magnetic pole pairs relative to P is also expressed as "360 / s / c" degrees in mechanical angle terms.

[0150] p: (Number of poles in the excitation section) / 2

[0151] c: Number of coils for each phase

[0152] Therefore, "(360 / p)×(n+m / s)" is essentially equal to "360 / s / c". The number of poles of the excitation section is consistent with the number of excitation cores 22N and 22S in the excitation section Fs, which is, for example, 76 (p=38) in the rotary motor M1. In addition, s=3 and c=2. Therefore, the angle between two adjacent magnetic pole pairs P is approximately 60 degrees in mechanical angle. In other words, the number of poles (p×2), the number of coils (s×c) in the armature section, and the number of magnetic poles 33a and 34a in the excitation section Fs are set in such a way that "(360 / p)×(n+m / s)" is essentially equal to "360 / s / c".

[0153] (Magnetic coupling in the direction of rotation)

[0154] In the first armature core H1, two adjacent magnetic pole groups G1 are magnetically coupled to each other in the rotational direction. In the rotary motor M1, multiple magnetic pole groups G1 are magnetically coupled via the yokes 33c formed on their inner sides. Therefore, the magnetic flux generated by the magnet Mg flows between the two magnetic pole groups G1 (see reference). Figure 3B Similarly, in the second armature core H2, two adjacent magnetic pole groups G2 in the rotational direction are also magnetically coupled to each other. Specifically, multiple magnetic pole groups G2 are magnetically coupled via the yokes 34c formed on their inner sides. Therefore, the magnetic flux generated by the magnet Mg flows between the two magnetic pole groups G2 (see reference). Figure 3B ).

[0155] The yoke portion 33c of the first armature core H1 does not have a structure that separates the magnetic properties of adjacent pole groups G1. A structure that separates the magnetic properties of the two pole groups G1 could be, for example, a slit formed in the yoke portion 33c, or a portion formed of a material having a higher magnetic reluctance than other parts of the armature core H1. Similarly, the yoke portion 34c of the second armature core H2 does not have a structure that separates the magnetic properties of adjacent pole groups G2. This situation facilitates the formation of magnetic fluxes Φ1 and Φ2 in the rotational direction (see reference). Figure 3B ).

[0156] In rotary motor M1, such as Figure 3BAs shown, the width Wa of the radially oriented yoke portion 33c is substantially fixed in the rotational direction. Furthermore, the width Wb of the radially oriented yoke portion 34c is also substantially fixed in the rotational direction. This configuration also facilitates the formation of magnetic fluxes Φ1 and Φ2 in the rotational direction (see reference). Figure 3B ).

[0157] Furthermore, in the rotary motor M1, such as Figure 3B As shown, the width Wa of the radially extending yoke portion 33c is greater than the protruding width W3 of the magnetic pole 33a. Furthermore, the width Wa of the yoke portion 33c can be greater than the sum of the width of the magnetic pole 33a and the width of the common base portion 33b. Additionally, the width Wb of the radially extending yoke portion 34c is greater than the protruding width W4 of the magnetic pole 34a. This configuration also facilitates the formation of magnetic fluxes Φ1 and Φ2 in the rotational direction (see reference). Figure 3B ).

[0158] (Core Connector)

[0159] The core connector L magnetically couples the armature cores H1 and H2. A magnetic flux Φ7 (refer to) is formed between the core connector L and the armature cores H1 and H2 through the core connector L. Figure 3B The armature section Am1 has multiple core connection sections L (see reference). Figure 1A They are spaced apart and arranged in the direction of rotation (i.e., the direction of mechanical action). For example... Figure 3B As shown, multiple core connection portions L are respectively provided on multiple pole pairs P. For example, a core connection portion L is provided on the pole pair Pu (pole pairs G1u, G2u) of the U phase, and a magnetic circuit is formed between the pole pair G1u of the first armature core H1 and the pole pair G2u of the second armature core H2 through the core connection portion L. Similarly, a core connection portion L is provided on each of the other two pole pairs Pw and Pv.

[0160] The armature portion Am1 has one first armature core H1 and two second armature cores H2. Core connectors L magnetically couple these three armature cores (H1, H2). Each core connector L extends from the upper second armature core H2 to the lower second armature core H2. Alternatively, the armature portion Am1 may have two core connectors L arranged axially. Furthermore, the first core connector L may couple the first armature core H1 to the upper second armature core H2, and the second core connector L may couple the first armature core H1 to the lower second armature core H2.

[0161] like Figure 1A As shown, the rotary motor M1 is a radially gapped type rotary motor, with the pole sets G1 and G2 located radially relative to the excitation section Fs. More specifically, the armature section Am1 is located inside the excitation section Fs; therefore, the pole sets G1 and G2 are radially inside the excitation section Fs. Figure 1C as well as Figure 1DAs shown, the core connector L is located inside the magnetic pole groups G1 and G2. In other words, the core connector L is located on the opposite side from the excitation section Fs, separated from the magnetic pole groups G1 and G2 and the coils CL. Therefore, the magnetic flux Φ7 flowing through the coil connector L can pass through the inside of the coil CL, and interference between the magnetic fluxes Φ1 and Φ2 flowing in the two magnetic pole groups (e.g., magnetic pole groups G1u and G1v) that are separated in the rotational direction and the magnetic flux Φ7 flowing through the core connector L can be suppressed. As a result, torque can be obtained by efficiently utilizing the magnetic flux formed in the magnetic circuit.

[0162] The position of the core connector L in the rotational direction can coincide with the center of the magnetic pole groups G1 and G2 in the rotational direction. In the rotary motor M1, the number of magnetic poles 34a constituting each magnetic pole group G2 differs from the number of magnetic poles 33a constituting the magnetic pole group G1 by only one. Therefore, the center of the magnetic pole group G1 in the rotational direction coincides with the center of the magnetic pole group G2 in the rotational direction. Thus, the centers of the three components (magnetic pole groups G1, G2, and core connector L) in the rotational direction are aligned.

[0163] like Figure 1A as well as Figure 1E As shown, the core connecting portion L magnetically couples the yoke portions 33c and 34c of the armature cores H1 and H2. In the armature portion Am1, axially penetrating fitting holes 33h and 34h are formed in the yoke portions 33c and 34c (see reference). Figure 1B The core connector L is inserted into the fitting hole 33h and 34h. The upper end of the core connector L reaches the upper surface of the armature part Am1 (the upper surface of the upper armature core H2), and the lower end of the core connector L reaches the lower surface of the armature part Am1 (the lower surface of the lower armature core H2).

[0164] In addition, unlike the rotary motor M1, the armature part Am1 can be located outside the excitation part Fs. At this time, the magnetic pole groups G1 and G2 are located radially outside the excitation part Fs, and the core connecting part L is arranged outside the magnetic pole groups G1 and G2.

[0165] Furthermore, unlike the armature portion Am1, the core connector L can be integrally formed with either armature core H1 or H2. In the armature portion Am1, the armature cores H1 and H2 are laminated steel plates as described below, but one or both of the armature cores H1 and H2 can also be formed from a soft magnetic powder material. In this case, the armature core formed from the powder material and the core connector can be integrally formed.

[0166] like Figure 1C as well as Figure 1D As shown, the width W20 of the core connector L in the direction of rotation (mechanical action direction) is smaller than the widths W21 and W22 of the magnetic pole groups G1 and G2 in the direction of rotation. Therefore, the magnetic flux Φ7 flowing through the core connector L can be formed more effectively (refer to...). Figure 3B ) and the magnetic fluxes Φ1, Φ2 flowing between two magnetic pole groups separated in the direction of rotation (refer to Figure 3B Both of them.

[0167] In the first armature core H1, as Figure 1D As shown, among the multiple magnetic poles 33a constituting each magnetic pole group G1, at least two magnetic poles 33a located at both ends can be located further outward than the two ends Le of the core connecting part L. Figure 1D In the example, the magnetic pole 33a at the right end is located further to the right of the right end Le of the core connecting part L, and the magnetic pole 33a at the left end is located further to the left of the left end Le of the core connecting part L. Similarly, in Figure 1C In the second armature core H2 shown, at least two of the multiple magnetic poles 34a constituting each magnetic pole group G2 located at both ends may be located further outward than the two ends Le of the core connection portion L. In this way, magnetic fluxes Φ1 and Φ2 flowing between the two magnetic pole groups separated in the rotational direction can be easily formed.

[0168] Furthermore, unlike the armature portion Am1, in the armature core H1 (and / or H2), multiple magnetic poles may be located further outward than the two ends Le of the core connecting portion L (right and left sides in the figure). For example, the multiple magnetic poles 33a located at the right end may be located further to the right of the right end Le of the core connecting portion L, and the multiple magnetic poles 33a located at the left end may be located further to the left of the left end Le of the core connecting portion L.

[0169] In addition, such as Figure 1D As shown, the width W23 of the radial core connector L is smaller than the widths Wa and Wb of the radial yokes 33c and 34c. Therefore, the size of the fitting holes 33h and 34h of the yokes 33c and 34c into which the core connector L is embedded is reduced, thereby ensuring the strength of the armature cores H1 and H2.

[0170] The first armature core H1 and the second armature core H2 are magnetically coupled only through the core connection portion L, and are magnetically separated in the region other than the core connection portion L. Specifically, as follows: Figure 1E As shown, gaps S1 and S2 are ensured between the first armature core H1 and the second armature core H2. Figure 1E In the rotary motor M1, gap S1 is the gap between the magnetic yoke 33c and the magnetic yoke 34c, and gap S2 is the gap between the magnetic pole 33a and the magnetic pole 34a. In the rotary motor M1, gap S1 and gap S2 can be substantially the same.

[0171] In addition, such as Figure 1EAs shown, gaps S1 and S2 are larger than the thickness of the winding of coil CL. Furthermore, armature cores H1 and H2 do not have axially protruding protrusions in the yoke portions 33c and 34c. That is, armature cores H1 and H2 may also not have structures in the yoke portions 33c and 34c where gap S1 is smaller than gap S2, except for the core connection portion L.

[0172] The first armature core H1, the second armature core H2, the coil CL, and the core connection portion L, i.e., the entire armature portion Am1, can be reinforced with a non-magnetic and insulating material. Resin can be used as this material, and the armature portion Am1 can be molded from resin. In this case, gaps S1 and S2 can be filled with the resin. Alternatively, for example, an air layer can be formed in the gaps S1 and S2.

[0173] (Magnetic circuit)

[0174] For example, when the angle difference between the excitation core 22N of the excitation section Fs and the magnetic pole 33a of the magnetic pole group G1u is 0 degrees (electric angle), the armature section Am1 and the excitation section Fs form a state similar to Figure 3B The magnetic fluxes Φ1, Φ2, and Φ7 generated by the magnet Mg are shown. Figure 3B In the process, the magnetic fluxes Φ1, Φ2, and Φ7 formed by the magnet Mg enter the magnetic pole group G1u of the first armature core H1 through the gap between the armature part Am1 and the excitation part Fs, and then pass through the magnetic flux inside the coil CLu.

[0175] like Figure 3B As shown, the magnetic circuit for forming the magnetic flux Φ1 includes the pole groups G1u and G1v of the first armature core H1, the pole groups G2u and G2v of the second armature core H2, the excitation cores 22N and 22S, and the magnet Mg between them. Specifically, the magnetic flux Φ1 enters the pole group G1u of the first armature core H1 from the excitation core 22N, and flows in the first armature core H1 in the direction of rotation between the pole groups G1u and G1v. Furthermore, the magnetic flux Φ1 flows in the direction of rotation in the second armature core H2 between the pole groups G2v and G2u. The magnetic flux Φ1 flows axially between the pole groups G1v and G2v through the excitation cores 22N and 22S and the magnet Mg, and also flows axially between the pole groups G1u and G2u through the excitation cores 22N and 22S and the magnet Mg. The magnetic flux Φ1 passes through the inner sides of the U-phase coil CLu and the V-phase coil CLv. Similarly, the magnetic circuit for forming the magnetic flux Φ2 includes the magnetic pole groups G1u and G1w of the first armature core H1, the magnetic pole groups G2u and G2w of the second armature core H2, the excitation cores 22N and 22S, and the magnet Mg between the two excitation cores.

[0176] like Figure 3BAs shown, one of the magnetic circuits for the flow of magnetic flux Φ7 includes the pole group G1u of the first armature core H1, the core connection L, the pole group G2u of the second armature core H2, the excitation cores 22N and 22S, and the magnet Mg between the two excitation cores. That is, the magnetic flux Φ7 enters the pole group G1u of the first armature core H1 from the excitation core 22N, and flows into the pole group G2u of the second armature core H2 through the core connection L via the inner side of the U-phase coil CLu. Furthermore, the magnetic flux Φ7 flows axially between the pole group G1u of the first armature core H1 and the pole group G2u of the second armature core H2 through the excitation cores 22N and 22S of the excitation part Fs and the magnet Mg. Additionally, as... Figure 3B As shown, a magnetic flux Φ7 is also formed between the magnetic pole group G1v of the first armature core H1 and the magnetic pole group G2v of the second armature core H2 via the core connection part L, and a magnetic flux Φ7 is formed between the magnetic pole group G1w of the first armature core H1 and the magnetic pole group G2w of the second armature core H2 via the core connection part L.

[0177] According to this type of rotary motor M1, unlike previous rotary motors, it is not necessary to magnetically separate the armature cores H1 and H2 in the rotational direction. Therefore, the strength of the armature cores H1 and H2 can be increased. Furthermore, magnetic flux is formed in two loops: one containing the core connection portion L and the other containing two magnetic pole groups (e.g., pole groups G1u and G1v) separated in the rotational direction. Therefore, magnetic saturation of the magnetic circuit can be suppressed. As a result, for example, the width of the yoke portions 33c and 34c can be narrowed, thereby facilitating the miniaturization and weight reduction of the armature portion Am1. This advantage becomes particularly significant when the number of magnetic poles 33a and 34a constituting one pole group G1 and G2 is increased. In addition, since the magnetic flux that saturates the magnetic circuit can be increased without increasing the width of the yoke portions 33c and 34c, the current supplied to the coil CL can be increased, thereby increasing the output torque of the rotary motor. These effects can also be obtained in the axial gap type rotary motors and linear motors described below.

[0178] Furthermore, the magnetic pole groups G1 and G2 are located radially inside the excitation section Fs. For example... Figure 1C as well as Figure 1D As shown, the core connector L is located inside the magnetic pole groups G1 and G2. More specifically, the position of the core connector L in the rotational direction coincides with the center of the magnetic pole groups G1 and G2 in the rotational direction. This suppresses interference between the magnetic fluxes Φ1 and Φ2 flowing through the two magnetic pole groups in the rotational direction and the magnetic flux Φ7 flowing through the core connector L. As a result, torque can be obtained by efficiently utilizing the magnetic flux flowing through the two magnetic circuits.

[0179] Furthermore, in the rotary electric motor M1, since the first armature core H1 is positioned between the two second armature cores H2, two magnetic circuits arranged axially are formed. According to this configuration, the density of magnetic flux flowing axially through the excitation cores 22N and 22S can be reduced, or the cross-sectional area (cross-sectional area relative to the plane perpendicular to the axial direction) of the excitation cores 22N and 22S can be reduced. Moreover, the coil CL is provided on the first armature core H1, while no coil is provided on the second armature core H2. Therefore, an optimal shape can be selected for each of the first armature core H1 and the second armature core H2, thereby increasing the degree of freedom in shape selection.

[0180] Furthermore, as long as both of the aforementioned two types of magnetic fluxes Φ1, Φ2, and Φ7 pass through the location, the position of the coil CL is not limited to the example of the rotating electric motor M1. For example, the coil CL can be located at both the magnetic pole group G1 of the first armature core H1 and the magnetic pole group G2 of the second armature core H2, or a portion of the coil CL can be located at the magnetic pole group G1 of the first armature core H1, and the remaining portion at the magnetic pole group G2 of the second armature core H2. In the configuration where the coil CL is located at both the magnetic pole group G1 of the first armature core H1 and the magnetic pole group G2 of the second armature core H2, for example, the winding direction of the coil CL located at the magnetic pole group G1u of the first armature core H1 is opposite to the winding direction of the coil CL located at the magnetic pole group G2u of the second armature core H2.

[0181] (Changes in magnetic flux)

[0182] Additionally, when the excitation section Fs from Figure 3B When the position shown is rotated 30 degrees (electrical angle) toward the magnetic pole groups G1v and G2v, the magnetic flux generated by the magnet Mg of the excitation section Fs changes. Specifically, the magnetic poles 33a and 34a constituting the magnetic pole groups G1v and G2v are directly opposite the magnet Mg of the excitation section Fs. Therefore, the magnetic flux through the magnetic circuit formed by the magnetic pole groups G1u and G1v of the first armature core H1, the excitation cores 22S and 22N of the excitation section Fs and the magnet Mg, and the magnetic pole groups G2u and G2v of the second armature core H2 no longer flows. Furthermore, the magnetic flux through the magnetic circuit including the magnetic pole group G1v of the first armature core H1, the core connection L, the magnetic pole group G2v of the second armature core H2, the excitation cores 22N and 22S, and the magnet Mg between the two excitation cores 22N and 22S no longer flows.

[0183] Furthermore, when the excitation section Fs from Figure 3B When the position shown is rotated 60 degrees (electrical angle) toward the magnetic pole groups G1v and G2v, the magnetic flux generated by the magnet Mg of the excitation section Fs will further change. Specifically, the magnetic poles 33a and 34a constituting the magnetic pole groups G1v and G2v become opposite to the excitation cores 22N and 22S of the excitation section Fs (and... Figure 3BIn comparison, the polarity of the opposite poles changes. Therefore, a magnetic flux is formed through the magnetic circuit formed by the magnetic pole groups G1v and G1w of the first armature core H1, the excitation cores 22S and 22N of the excitation section Fs, the magnet Mg, and the magnetic pole groups G2v and G2w of the second armature core H2. Furthermore, a magnetic flux is formed through the magnetic circuit including the magnetic pole group G1v of the first armature core H1, the core connection section L, the magnetic pole group G2v of the second armature core H2, the excitation cores 22N and 22S, and the magnet Mg between the two excitation cores 22N and 22S (and...). Figure 3B In contrast, the direction of magnetic flux flow is opposite. Thus, as the excitation unit Fs rotates, the magnetic circuit of the magnetic flux passing through the inner sides of the U, V, and W phase coils CLu, CLv, and CLw changes. Furthermore, the quantity or direction of the magnetic flux flowing through the magnetic circuit also changes. Specifically, the magnetic flux passing through the inner sides of the U, V, and W phase coils CLu, CLv, and CLw changes in an approximately sinusoidal shape after being offset by 120 degrees using an electric angle meter.

[0184] (Material of the armature section)

[0185] In the rotary electric motor M1, each armature core H1 and H2 is a stacked steel plate. Specifically, the first armature core H1 is entirely composed of multiple steel plates Sp1 (more specifically, electromagnetic steel plates) stacked axially, and the second armature core H2 is also entirely composed of multiple steel plates Sp1 (more specifically, electromagnetic steel plates) stacked axially. This construction of the armature cores H1 and H2 suppresses the induced current generated in the armature cores H1 and H2 due to magnetic flux flowing between the two separate magnetic pole groups G1 in the rotational direction.

[0186] The core connector L is also a stacked steel plate comprising multiple steel plates Sp2 (more specifically, electromagnetic steel plates). The direction in which the steel plates Sp2 of the core connector L are stacked differs from the direction in which the steel plates Sp1 of the armature cores H1 and H2 are stacked. Specifically, as follows... Figure 1A as well as Figure 1E As shown, the steel plates Sp2 of the core connecting part L are arranged along the direction of separation of the armature cores H1 and H2, i.e., the direction of the magnetic flux Φ7. The direction in which the multiple steel plates Sp2 are stacked is the rotation direction (mechanical action direction) of the rotary motor M1. In the rotary motor M1, the steel plates Sp2 of the core connecting part L are arranged axially, and the multiple steel plates Sp2 are stacked in the rotation direction (more specifically, the tangential direction of rotation). According to this structure of the core connecting part L, the induced current generated in the core connecting part L due to the magnetic flux Φ7 flowing axially between the magnetic pole groups G1 and G2 can be suppressed.

[0187] Additionally, as detailed below, the armature cores H1 and H2 can be entirely formed of a soft magnetic powder material, or most of the armature cores H1 and H2 can be composed of laminated steel plates, with a portion formed of a soft magnetic powder material. Furthermore, the core connection portion L can also be formed of a soft magnetic powder material. In this case, the core connection portion L can be integrally formed with the armature core H1 (or H2), which is also formed of a soft magnetic powder material.

[0188] (Example of a change in the number of armature cores)

[0189] The number of armature cores can be more than three. The armature section may have, for example, two first armature cores H1 separated axially, a third armature core disposed between the two first armature cores H1, and two second armature cores H2 disposed above and below the two first armature cores H1, respectively. The third armature core may have a structure in which the two second armature cores H2 are axially joined together. For example, the axial width of the third armature core may be the sum of the widths of the two armature cores H2. The axial width of the excitation section Fs may correspond to the axial width of the entire five armature cores. The armature section may have a structure in which more armature cores (e.g., seven or nine armature cores) overlap axially.

[0190] The number of armature cores may be less than three. For example, the armature section may consist of one first armature core H1 and one second armature core H2. The second armature core H2 of the armature section may have a reference... Figure 1A The described structure consists of two second armature cores H2 joined together axially. That is, the axial width of the second armature core H2 can be... Figure 1A The sum of the widths of the two armature cores H2 shown. The second armature core H2 can be configured on one side of the first armature core H1. Figure 1A (The upper or lower side of the first armature core H1 in the coil). According to this configuration, since the number of parts can be reduced and the coil CL is exposed on the upper or lower side, it is easy to connect the component (e.g., bus) that supplies current to the coil CL to the coil CL.

[0191] In the armature section, multiple armature cores with identical structures can be arranged axially. This results in advantages such as a reduction in the number of parts and lower mold costs. In this case, the number of poles in each pole group of one armature core is the same as the number of poles in each pole group of another armature core. Furthermore, the two armature cores can be configured with their pole positions offset by 180 degrees using an electrical angle gauge.

[0192] (Induced current prevention structure)

[0193] Armature cores H1 and H2 have mating holes 33h and 34h through which cores H1 and H2 pass in the stacking direction of those steel plates Sp1 (see reference). Figure 1BThe core connector L is inserted into the fitting hole for 33h and 34h. (Example) Figure 1C as well as Figure 1D As shown, slits S3 and S4 are formed in the armature cores H1 and H2. These slits S3 and S4 prevent the magnetic flux Φ7 flowing through the core connection L (refer to...) from being affected. Figure 3B Induced currents are generated in the armature cores H1 and H2.

[0194] Figure 4 as well as Figure 5 This diagram illustrates the structure used to prevent the generation of induced current in armature cores H1 and H2. Figure 5 yes Figure 4 A cross-sectional view at the VV line. Figure 4 as well as Figure 5 Armature cores H1 and H2 do not form slits S3 and S4. For example... Figure 5 As shown, magnetic flux Φ11~Φ14 forms from the steel plate Sp2 of the core connection L to the steel plate Sp1 of the armature core H1. Through this magnetic flux Φ11~Φ14, as... Figure 4 As shown, an induced current C1 is generated around the core connection L. Figure 1C as well as Figure 1D As shown, the aforementioned slits S3 and S4 are formed in the armature cores H1 and H2. These slits S3 and S4 extend from the fitting holes 33h and 34h into which each core connecting portion L is embedded, in a direction intersecting the stacking direction relative to the steel plate Sp1 of the armature core H1 (radial direction of the rotary motor M1), and intersect with the closed curve surrounding the fitting holes 33h and 34h. In this specification, the term "closed curve surrounding the fitting holes" refers to, for example, a circle or ellipse surrounding the fitting holes 33h and 34h, but is not limited to this; it may also have a shape corresponding to the shape of the fitting holes 33h and 34h into which the core connecting portion L is embedded. In the example of the rotary motor M1, the slits S3 and S4 extend towards the excitation portion Fs, reaching the openings on the excitation portion Fs side of the armature cores H1 and H2. Therefore, the generation of induced current C1 can be prevented through the slits S3 and S4. In the rotary motor M1, since the excitation part Fs is located outside the armature part Am1, the slits S3 and S4 extend radially outward from the fitting holes 33h and 34h.

[0195] Figure 6 This is a schematic diagram showing the cross-sections of armature cores H1 and H2, and the core connection L. The magnetic flux Φ7 in this diagram is... Figure 3B The magnetic flux flowing in the magnetic circuit including the core connecting part L is shown. In the rotary electric machine M1, there is a magnetic flux Φ7 flowing in the core connecting part L and magnetic fluxes Φ1 and Φ2 passing through the yokes 33c and 34c of the armature cores H1 and H2 (refer to...). Figure 3BTherefore, the total magnetic flux Φ7 formed by each of the three phases, U, V, and W, will not be zero. For example, the magnetic flux Φ7 flowing from the first armature core H1 towards the second armature core H2 through multiple core connection parts L will be greater than the magnetic flux Φ7 flowing from the second armature core H2 towards the first armature core H1 through multiple core connection parts L, or the opposite may occur.

[0196] In the absence of slit S3, a closed circuit is formed between the multiple core connection parts L and the excitation part Fs, with the axis Ax as the center and passing through the entire first armature core H1. Figure 8 (The circuit in the middle is where the induced current C2 flows). Similarly, when the slit S4 is not formed, a closed circuit is formed between the multiple core connection parts L and the excitation part Fs, with the axis Ax as the center and passing through the second armature core H2 as a whole. Figure 6 In the rotating motor M1, a closed circuit in the direction of rotation is formed in the portions M and N (the portions marked with dots) between the core connection portion L and the excitation portion Fs. As described above, the total magnetic flux Φ7 flowing in all core connection portions L will not be zero, therefore, an induced current will be generated in this closed circuit due to the magnetic flux Φ7. However, in the rotating motor M1, the slits S3 and S4 and the closed curve that passes between the plurality of fitting holes 33h and 34h arranged in the direction of rotation and the plurality of magnetic pole groups G1 and G2 arranged in the direction of rotation and surrounds the axis Ax. In this specification, the "closed curve surrounding the axis Ax" is, for example, a circle centered on the axis Ax, but it can also be a curve with a detour that avoids the fitting holes 33h and 34h (for example, see reference). Figure 8 (Line C2). Slits S3 and S4 extend from the fitting holes 33h and 34h toward the excitation section Fs, reaching the openings on the excitation section Fs side of the armature cores H1 and H2. Therefore, the closed circuit of the armature cores H1 and H2 as a whole is blocked by slits S3 and S4, which can prevent the generation of rotational induced current C2 in the armature cores H1 and H2 (refer to the line C2). Figure 8 ).

[0197] Alternatively, electrical insulating material can be filled into the slits S3 and S4 in the armature cores H1 and H2. For example, when the armature cores H1 and H2 are integrally molded from resin, the slits S3 and S4 are filled with resin (electrically insulating material). Furthermore, the slits S3 and S4 only need to be electrically insulating; ideally, their width should be narrowed to reduce magnetic reluctance.

[0198] Fitting holes 33h and 34h are through holes with closed inner surfaces. Figure 1C as well as Figure 1D The slits S3 and S4 shown extend from the fitting holes 33h and 34h. The structure for preventing induced current generation is not necessarily limited to slits S3 and S4. For example... Figure 7As shown, fitting holes 33g and 34g, which open in a direction that intersects with the stacking direction relative to the steel plate Sp1, can also be formed in the armature cores H1 and H2. Figure 7 In the example, the fitting holes 33g and 34g open to the side opposite to the excitation section Fs. These fitting holes 33g and 34g prevent the generation of induced current C1 around each core connection section L (see reference). Figure 8 Furthermore, this configuration of the core connecting part L increases the distance between the magnetic pole groups G1 and G2 and the fitting holes 33g and 34g, resulting in more effective suppression of saturation of the yoke parts 33c and 34c due to magnetic flux flowing in the rotation direction.

[0199] like Figure 7 As shown, the width of the openings of the fitting holes 33g and 34g in the rotation direction (the width W1 in the rotation direction of the rotary motor M1, refer to...) Figure 8 The width of the core connector L in that direction is greater than half of its width. More ideally, the width W1 of the openings of the fitting holes 33g and 34g in the rotation direction should substantially correspond to the width of the core connector L in that direction. With this structure, it is possible to prevent the generation of induced current around the end of the core connector L due to the magnetic flux Φ7 passing through the end in the rotation direction of the core connector L. Figure 7 In the example shown, the edges of the openings of the fitting holes 33g and 34g only contact one or two steel plates Sp2 located at the end of the core connecting part L, and the remaining steel plates Sp2 are exposed from the openings of the fitting holes 33g and 34g.

[0200] In the armature cores H1 and H2, instead of the radially open fitting holes 33g and 34g, fitting holes 33h and 34h can be formed from which the core connecting portion L is inserted (see reference). Figure 1B A slit extending toward the side opposite to the excitation section Fs. In this structure, it is also possible to prevent the generation of induced current C1 around each core connection section L.

[0201] In such Figure 7 The structure shown, in which the fitting holes 33g and 34g face the side opening opposite to the excitation part Fs, forms the following closed circuit: a closed circuit formed between the multiple core connecting parts L and the excitation part Fs, and passing through the armature cores H1 and H2 as a whole with the axis Ax as the center. Figure 8 (The circuit in the middle contains an induced current C2). Therefore... Figure 6 The magnetic flux Φ7 shown causes an induced current C2 in this closed circuit (refer to...). Figure 8 In this regard, such as Figure 7 as well as Figure 9AAs shown, slits S5 and S6 can be formed in armature cores H1 and H2. Slits S5 and S6 intersect with a closed curve that surrounds axis Ax between multiple mating holes 33g and 34g arranged in the rotational direction and multiple magnetic pole groups G1 and G2 arranged in the rotational direction. Through these slits S5 and S6, the closed circuit of the entire armature cores H1 and H2 centered on axis Ax is interrupted, thereby preventing the generation of rotational induced current C2 in armature cores H1 and H2 (see reference). Figure 8 Slit S5 extends, for example, from one of the plurality of fitting holes 33g toward the excitation section Fs, reaching the opening on the side of the excitation section Fs. More specifically, slit S5 extends from the center of the fitting hole 33g in the rotational direction toward the magnetic pole group G1. Similarly, slit S6 (see reference) Figure 7 For example, it extends from one of the multiple fitting holes 34g toward the excitation section Fs, reaching the opening on the side of the excitation section Fs.

[0202] Slits S5 and S6 may not necessarily be connected to fitting holes 33g and 34g. For example, as... Figure 9B As shown, slit S5 can also be formed between two adjacent magnetic pole groups G1. This slit S5 extends from the edge on the excitation section Fs side of the first armature core H1 to the edge on the opposite side. The slit S6 of the second armature core H2 also extends from the edge on the opposite side. Figure 9B Similarly, the slit S5 shown can be formed between two adjacent magnetic pole groups G2. These slits S5 and S6 also intersect the closed curve encircling the axis Ax between the interlocking holes 33g and 34g arranged in the rotational direction and the multiple magnetic pole groups G1 and G2 arranged in the rotational direction. As a result, it is possible to prevent the generation of rotational induced currents in the armature cores H1 and H2. Slits S5 and S6 only need to be electrically insulated; ideally, their width should be narrowed to reduce magnetic reluctance.

[0203] When the core connector L is electrically connected to the inner surfaces of the fitting holes 33h and 34h, a closed circuit surrounding the magnetic flux will be formed by the magnetic flux passing through a portion of the core connector L (the portion located to the right of the slit S3 and the portion located to the left of the slit S3). This may generate an induced current C3 (see reference). Figure 1D To address this, a gap (insulating portion) can also be locally formed between the core connection portion L and the inner surfaces of the fitting holes 33h and 34h. In this way, the induced current C3 can be reduced.

[0204] In addition, the multiple steel plates Sp2 constituting the core connecting part L (refer to) Figure 1AThe steel plates Sp2 of the core connecting portion L are stacked in the direction of mechanical operation (rotation direction) of the rotary motor M1. Unlike the example of the rotary motor M1, when the steel plates Sp2 of the core connecting portion L are stacked radially, an induced current due to magnetic flux Φ7 is easily generated in the steel plate Sp2 located at the radial end. In contrast, in the rotary motor M21, since the steel plates Sp2 of the core connecting portion L are stacked radially, the generation of this induced current can be suppressed.

[0205] (An example of an excitation section being arranged on the inside of the armature core)

[0206] Figure 10 This is a perspective view showing an example of an armature section Am3 arranged on the outside of the excitation section Fs, serving as another example of a rotary electric machine proposed in this invention. Figure 10 In the diagram, a portion of the rotation direction of the armature section Am3 is not shown. Here, it is used in conjunction with... Figure 1A The explanation will focus on the differences in the rotary motor M1 shown. Figure 10 The following matters not described in the description of the rotary motor M3 can also be applied. Figure 1A The structure of the rotary motor M1.

[0207] Similar to armature section Am1, armature section Am3 also has a first armature core H1 positioned between two second armature cores H2. Armature cores H1 and H2 have annular yokes 33c and 34c, and multiple pole groups G1 and G2 formed inside the yokes 33c and 34c and arranged in the rotational direction. Each pole group G1 and G2 has multiple poles 33a and 34a protruding towards the excitation section Fs and arranged in the rotational direction. A coil CL is wound around the multiple poles 33a constituting pole group G1. The outer diameter of the yoke 34c of the second armature core H2 can be the same as the outer diameter of the yoke 33c of the first armature core H1. This simplifies and increases the precision of the mounting structure when fixing armature section Am3 to the structure of the device for mounting the rotary motor M3.

[0208] exist Figure 10 In the example, each magnetic pole group G1 has 4 magnetic poles 33a, and each magnetic pole group G2 has 5 magnetic poles 34a, but these numbers can be changed appropriately. The magnetic poles 34a located at the ends of magnetic pole group G2 can be integrated with the magnetic poles 34a of the adjacent magnetic pole group G2.

[0209] The conditions for the angles (mechanical and electrical angles) between two adjacent magnetic pole pairs P can be found in the following: Figure 2 The example shown is the same. As mentioned above, the angle between two adjacent magnetic pole pairs P is essentially “360×(n+m / s)” degrees in electrical angle, ensuring that the angle between two adjacent magnetic pole pairs P is “(360 / p)×(n+m / s)” degrees in mechanical angle (as mentioned above, the mechanical angle is also expressed as “360 / s / c”).

[0210] s: Phase number

[0211] m: an integer greater than 1 and less than s-1 (excluding divisors of s (excluding 1) and multiples of divisors of s (excluding 1)).

[0212] n: an integer greater than or equal to 1

[0213] p: (Number of poles in the excitation section) / 2

[0214] c: Number of coils for each phase

[0215] Figure 10 In the example, s = 3, n = 4, m = 1, c = 3, p = 39. The winding direction of the coils CL in each of the multiple phases can be the same as... Figure 1A The examples described above are the same. For instance, the three U-phase coils CLu are wound in the same direction.

[0216] The armature portion Am3 also has multiple core connectors L spaced apart and arranged in the rotational direction (i.e., the mechanical action direction). The armature portion Am3 has one first armature core H1 and two second armature cores H2, and the core connectors L magnetically couple these three armature cores (H1, H2). Alternatively, the armature portion Am3 may have a first core connector L that couples the first armature core H1 to the upper second armature core H2, and a second core connector L that couples the first armature core H1 to the lower second armature core H2.

[0217] like Figure 10 As shown, the core connector L is located on the opposite side to the excitation section Fs, separated from the pole pairs P (e.g., pole pairs G1u, G2u) and the coils CL. In other words, the core connector L is located radially outside the pole pairs G1 and G2. The position of the core connector L in the rotational direction can be aligned with the center of the pole pairs G1 and G2 in the rotational direction. This suppresses interference between the magnetic flux flowing through the two pole pairs separated in the rotational direction and the magnetic flux flowing through the core connector L.

[0218] In the armature cores H1 and H2, the yoke portions 33c and 34c have axially penetrating fitting holes 33h and 34h. The core connecting portion L is inserted into these fitting holes 33h and 34h. In the second armature core H2, a hole 34e can also be formed between two adjacent fitting holes 34h (two adjacent core connecting portions L). This helps to suppress the increase in weight of the second armature core H2.

[0219] Two types of magnetic circuits are also formed in the rotating electric motor M3. One type of the first magnetic circuit is, for example, with… Figure 3BThe rotary motor M1 described herein also includes the magnetic pole groups G1u and G1v of the first armature core H1, the magnetic pole groups G2u and G2v of the second armature core H2, excitation cores 22N and 22S, and the magnet Mg between the two excitation cores 22N and 22S. Furthermore, another type of the first magnetic circuit includes the magnetic pole groups G1u and G1w of the first armature core H1, the magnetic pole groups G2u and G2w of the second armature core H2, excitation cores 22N and 22S, and the magnet Mg between the two excitation cores. The second magnetic circuit includes the magnetic pole group G1u of the first armature core H1, the core connection portion L, the magnetic pole group G2u of the second armature core H2, excitation cores 22N and 22S, and the magnet Mg between the two excitation cores 22N and 22S.

[0220] Also in the armature section Am3 Figure 1A Similarly, in the armature section Am1, the width of the core connector L in the rotation direction (mechanical action direction) is smaller than the width of the magnetic pole groups G1 and G2 in the rotation direction. Therefore, the magnetic flux Φ7 flowing through the core connector L (refer to...) is formed more effectively. Figure 3B ) and the magnetic fluxes Φ1, Φ2 flowing between two magnetic pole groups separated in the direction of rotation (refer to Figure 3B Both of them.

[0221] It is also preferred to be in the armature section Am3 with Figure 1C as well as Figure 1D Similarly, in the configuration shown, at least two of the multiple magnetic poles 33a constituting each magnetic pole group G1, located at both ends, are positioned further outward (clockwise and counterclockwise) than the two ends Le of the core connecting portion L. Likewise, at least two of the multiple magnetic poles 34a constituting each magnetic pole group G2, located at both ends, are positioned further outward (clockwise and counterclockwise) than the two ends Le of the core connecting portion L. This facilitates the formation of magnetic fluxes Φ1 and Φ2 flowing between the two magnetic pole groups G1 and G2, which are separated in the rotational direction (see reference). Figure 3B ).

[0222] Armature cores H1 and H2 are laminated steel plates. In armature cores H1 and H2, as... Figure 10 As shown, slits S3 and S4 extending from each mating hole 33h and 34h are formed. Slits S3 and S4 extend toward the excitation section Fs, reaching the edge of the armature cores H1 and H2 on the excitation section Fs side, and opening toward the excitation section Fs. Thus, induced current C1 (refer to) can be prevented from being generated around each core connection L through these slits S3 and S4. Figure 4 According to slits S3 and S4, it is possible to prevent the armature core H1 from generating an induced current C2 in the direction of rotation (refer to...). Figure 8 It can also prevent the armature core H2 from generating induced current in the direction of rotation.

[0223] In addition, the multiple fitting holes into which the multiple core connectors L are respectively embedded can also be used with Figure 7 Conversely, in the example, the openings are radially outward toward the armature cores H1 and H2. (In other words, the core connection portion L can be at least partially exposed radially outward.) That is, the multiple fitting holes can also open toward the side opposite to the excitation portion Fs. Through this opening, it is possible to prevent the generation of induced current C1 surrounding each core connection portion L (see...). Figure 4 In this type of construction, it is also possible to... Figure 9A as well as Figure 9B As shown, slits S5 and S6 are formed in armature cores H1 and H2. These slits S5 and S6 intersect with a closed curve that passes through multiple fitting holes containing multiple core connecting parts L and between multiple magnetic pole groups G1 and G2 arranged in the rotation direction and surrounds the axis Ax.

[0224] Furthermore, as an example, an armature section Am1 is arranged inside the excitation section Fs. Figure 1A The following will be explained, taking as an example an armature section Am3 arranged outside the excitation section Fs. Figure 10 However, in one example of a rotating electric motor, two armature sections may be arranged inside and outside a single excitation section Fs.

[0225] (An example with an armature core formed from pressed powder material)

[0226] The armature core can be formed from a soft magnetic powder material. Figure 11 The rotary motor M4 with this configuration is shown as another example of the rotary motor proposed in this invention. Figure 11 This is a 3D view of the rotary electric motor M4. Part of the rotation direction of the excitation unit Fs is not shown. Figure 11 The following matters not described in the illustration of the rotary motor M4 can also be applied. Figure 1A The structure of the rotary electric motor M1. Figure 11 The armature core structure shown can be applied not only to the radial clearance type rotary motor shown in the figure, but also to linear motors and axial clearance type rotary motors.

[0227] The armature portion Am4 of the rotary electric motor M4 has armature cores H1 and H2 formed of soft magnetic composite (SMC) materials. Specifically, the armature cores H1 and H2 are formed from a composite material containing soft magnetic powder and an insulating film (e.g., a resin film) covering the powder surface. The composite material is compressed and heat-treated to form the armature cores H1 and H2. Because these armature cores H1 and H2 have high resistivity, induced current can be suppressed regardless of the direction of the magnetic flux through them. Therefore, unlike the rotary electric motor M1 described above, the armature cores H1 and H2 may not have slits S3, S4, S5, and S6 formed on them.

[0228] The pressed powder material differs from laminated steel plates; it is manufactured using molds. Therefore, a high degree of freedom can be ensured regarding the shapes of the magnetic poles 33a and 34a. In the armature section Am4, the widths of the magnetic poles 33a and 34a change axially. The width of magnetic pole 33a gradually decreases as it approaches the second armature core H2. On the other hand, the width of magnetic pole 34a gradually decreases as it approaches the first armature core H1. This reduces cogging torque.

[0229] Furthermore, the magnetic poles 33a and 34a may also have axially extending protrusions (not shown) at their front ends. As a result, the area of ​​the front end face of the magnetic poles 33a and 34a (the area of ​​the face facing the excitation part Fs) is increased, which can reduce the magnetic resistance caused by the gap between the excitation part Fs and the magnetic poles 33a and 34a.

[0230] The conditions regarding the angles (mechanical angle and motor angle) between two adjacent magnetic pole pairs P can be found in... Figure 2 The example shown is the same. Furthermore, the winding direction of the coils CL in each of the multiple phases can be the same as in the example illustrated in Figure 1, etc. Alternatively, two coils CL with different winding directions can be provided for each of the multiple phases. For example, the winding directions of the two U-phase coils CLu can also be opposite to each other.

[0231] like Figure 11 As shown, the rotary motor M4, like the rotary motor M1, has multiple core couplings L spaced apart and arranged in the direction of rotation (i.e., the direction of mechanical action). The armature section Am4 has one first armature core H1 and two second armature cores H2, and the core couplings L magnetically couple these three armature cores (H1, H2). The core couplings L are located on the side opposite to the excitation section Fs, separated from the pole pairs P (pole pairs G1, G2 arranged axially) and the coils CL. The position and size of the core couplings L in the direction of rotation can be... Figure 1A The rotary motor M1 shown is the same.

[0232] The yoke portions 33c and 34c of armature cores H1 and H2 have axially penetrating fitting holes 33h and 34h. Core connecting portions L are inserted into these fitting holes 33h and 34h. Alternatively, multiple core connecting portions L may be integrally formed with the first armature core H1. In this case, the core connecting portions L can be inserted into the fitting holes 34h formed in the second armature core H2. Conversely, multiple core connecting portions L may also be integrally formed with the second armature core H2. In this case, the core connecting portions L can be inserted into the fitting holes 33h formed in the first armature core H1.

[0233] (An example where multiple core connectors are provided in each magnetic pole group)

[0234] In the examples of rotary electric machines M1 to M4, the number of core connecting parts L provided for each pole pair P is one. However, this can be different; multiple core connecting parts L arranged in the rotational direction (mechanical action direction) can be provided for each pole pair P. In the examples of rotary electric machines M1 to M4, the number of magnetic poles 33a and 34a provided in each pole pair G1 and G2 is 4 to 6, but the number of magnetic poles 33a and 34a provided in each pole pair G1 and G2 can also be more. In this case, multiple core connecting parts L can be provided for each pole pair P. With this structure, the total cross-sectional area (area viewed axially) of the multiple core connecting parts L provided in each pole pair P can be increased. Therefore, the increase in the width and weight of the yokes 33c and 34c can be suppressed, and the magnetic flux through each pole pair G1 and G2 can be increased.

[0235] Figure 12A as well as Figure 12B This diagram illustrates the rotary motor M5 as an example of a rotary motor containing an armature core with this configuration. Figure 12A This is a 3D view of a part of the M5 rotary electric motor. Figure 12B This is a top view of the first armature core H1 of the rotary electric motor M5. Here, it is compared with... Figure 1A The differences of the rotary motor M1 shown will be explained in detail. The construction of the rotary motor M1 can be applied to aspects of the rotary motor M5 that are not described herein. The armature core construction described here can be applied not only to the radial clearance type rotary motor shown in the figure, but also to linear motors and axial clearance type rotary motors.

[0236] In the rotary electric motor M5, each pole group G1 has 11 magnetic poles 33a, and each pole group G2 has 12 magnetic poles 34a. A coil CL is provided in each pole group G1. That is, one coil CL is wound around the 11 magnetic poles 33a constituting each pole group G1. The pole groups G1 and G2 constituting each pole pair P are magnetically coupled through multiple core connecting parts L arranged in the rotational direction. Figure 12AIn this configuration, magnetic pole pairs G1 and G2 are magnetically coupled through three core connectors L. Therefore, the angle between two adjacent core connectors L can be changed, allowing the arrangement of multiple core connectors L to uniformly follow the bending of magnetic pole pairs G1 and G2. The number of core connectors L provided in a single magnetic pole pair P can be two or more than three.

[0237] like Figure 12B As shown, at least two of the multiple magnetic poles 33a constituting each magnetic pole group G1 located at both ends can be positioned further outward (clockwise and counterclockwise) than the two ends Le of the three core connecting portions L. In this figure, the multiple magnetic poles 33a (more specifically, two magnetic poles 33a) located at the right end are positioned further to the right than the right end Le of the three core connecting portions L, and the multiple magnetic poles 33a (more specifically, two magnetic poles 33a) located at the left end are positioned further to the left than the left end Le of the three core connecting portions L. In the second armature core H2, it is also sufficient that at least two of the multiple magnetic poles 34a constituting each magnetic pole group G2 located at both ends are positioned further outward (clockwise and counterclockwise) than the two ends Le of the three core connecting portions L. In this way, it is easy to form magnetic fluxes Φ1, Φ2 (refer to) flowing between the two magnetic pole groups separated in the rotational direction. Figure 3B ).

[0238] like Figure 12B As shown, the three fitting holes 33h, each containing a core connecting portion L, are connected in the rotational direction with a gap 33m between them. Furthermore, a slit S3 is formed extending from one of the three fitting holes 33h toward the excitation portion Fs. The closed curve surrounding the three fitting holes 33h intersects the slit S3. This prevents induced current surrounding the three core connecting portions L from being generated in the first armature core H1.

[0239] In addition, unlike Figure 12B For example, the three fitting holes 33h can also be separated from each other. That is, a gap 33m may not be formed between two adjacent fitting holes 33h. In this case, three slits S3 can extend from the three fitting holes 33h toward the excitation part Fs respectively. In this way, it is possible to prevent the induced current surrounding each core connection part L from being generated in the first armature core H1.

[0240] In addition, it can also be different. Figure 12B For example, a slit is formed extending from one of the three fitting holes 33h (or multiple fitting holes 33h) toward the side opposite to the excitation section Fs. In this case, it can also be combined with... Figure 9A or Figure 9BSimilarly, in the example shown, a slit S5 is formed in the first armature core H1, which intersects a closed curve that passes between a plurality of mating holes 33h arranged in the rotational direction and a plurality of magnetic pole groups G1 arranged in the rotational direction, and surrounds the axis Ax. The slit S5 can be as follows: Figure 9A As shown, for example, it extends from one of the multiple fitting holes 33h toward the excitation section Fs, and opens at the edge toward the excitation section Fs side, or it can be like this. Figure 9B As shown, for example, it is formed between two magnetic pole groups G1. The construction described here can also be applied to the second armature core H2 of the rotating electric motor M5.

[0241] In the rotating electric motor M5, the angle between two adjacent magnetic pole pairs P can also be "360×(n+m / s)" degrees as measured by an electric angle meter.

[0242] s: Phase number

[0243] m: an integer greater than 1 and less than s-1 (where the divisors of s (excluding 1) and the divisors of s (excluding 1) are all integers.

[0244] (excluding multiples of 1)

[0245] n: an integer greater than or equal to 1

[0246] In the rotating electric motor M5, s = 3, m = 1, and n = 12. Therefore, the angle between two adjacent magnetic pole groups and P is 4,440 degrees in electrical degrees.

[0247] Furthermore, ensure that the angle between two adjacent magnetic pole pairs P is expressed as "(360 / p)×(n+m / s)" degrees in mechanical angle measurement. Additionally, the angle between two adjacent magnetic pole pairs P is also expressed as "360 / s / c" degrees in mechanical angle measurement.

[0248] p: (Number of poles in the excitation section) / 2

[0249] c: Number of coils for each phase

[0250] Therefore, "(360 / p)×(n+m / s)" is essentially equal to "360 / s / c". The number of poles of the excitation section is consistent with the number of excitation cores 22N and 22S in the excitation section Fs, which is, for example, 148 (p=74) in the rotary motor M1. In addition, s=3 and c=2. Therefore, the angle between two adjacent pole pairs P is approximately 60 degrees in mechanical angle. In other words, the number of poles (p×2), the number of coils (s×c) in the armature section, and the number of magnetic poles 33a and 34a in the excitation section Fs are set in such a way that "(360 / p)×(n+m / s)" is essentially equal to "360 / s / c".

[0251] (An example of an armature core consisting of multiple sub-cores)

[0252] An armature core can also be composed of multiple separately formed and coupled parts (partial armature cores).

[0253] Figure 13A as well as Figure 13B This is a diagram illustrating the armature portion Am6 of a rotary electric machine having this structure, as another example of a rotary electric machine proposed in this invention. Figure 13A This is an exploded three-dimensional view of the armature section Am6. Figure 13B This is a top view of the first armature core H1 that constitutes the armature section Am6. The armature section Am6 is similar to the armature section of the other rotary electric machine described above, having a first armature core H1, two second armature cores H2, and a core connecting section L that magnetically couples the armature cores H1 and H2. Furthermore, the armature core structure described here is applicable not only to the radial clearance type rotary electric machine shown in the figure, but also to linear motors and axial clearance type rotary electric machines.

[0254] The first armature core H1 has multiple magnetic pole groups arranged in the rotation direction, core 33A (see reference). Figure 13A The core 33A of the magnetic pole assembly has multiple magnetic poles 33a arranged in the rotation direction (see reference). Figure 13B ), and a common base 33b located at the base of multiple magnetic poles 33a (see reference ). Figure 13B Multiple magnetic poles 33a constitute magnetic pole group G1. Furthermore, the first armature core H1 has an annular yoke portion core 33D (see reference). Figure 13A ).

[0255] like Figure 13A As shown, multiple magnetic pole group cores 33A are arranged outside the magnetic yoke core 33D. The magnetic pole group cores 33A are separate from the magnetic yoke core 33D, connected by a connecting mechanism Li1 (engaging part 55a, engaged part 55b, see reference). Figure 13B It is connected to the yoke core 33D. Both the pole group core 33A and the yoke core 33D are formed of laminated steel plates. According to this first armature core H1, compared with the case where the entire armature core is composed of a single laminated steel plate, the yield of core material when manufacturing the first armature core H1 can be improved.

[0256] like Figure 13A As shown, in the armature section Am6, similar to the example of the rotary motor M1, a coil CL is provided in the pole group G1. That is, in the armature section Am6, the portion where the coil CL is provided (i.e., the pole group core 33A) is formed separately from the yoke core 33D. Therefore, during the manufacturing process of the armature section Am6, for example, the following steps can be performed: the coil CL of the cylindrical winding or the air-core winding is installed in the pole group core 33A, and then the pole group core 33A is connected to the yoke core 33D. Therefore, the distance K1 between adjacent pole group cores 33A can be reduced (see reference). Figure 13B As a result, the number of magnetic poles 33a constituting a magnetic pole group G1 can be increased, thereby improving the utilization efficiency of magnet Mg and increasing the output torque of the rotary motor.

[0257] like Figure 13B As shown, the plurality of magnetic poles 33a constituting each magnetic pole group G1 includes the outermost magnetic pole 33a1 located in the rotation direction. The magnetic pole 33a1 protrudes further in the rotation direction than the side surface 33u of the common base 33b. This shape of the magnetic pole group partial core 33A allows for an increase in the number of magnetic poles 33a constituting the magnetic pole group G1.

[0258] like Figure 13B As shown, the magnetic pole assembly core 33A has a slit S3 to prevent induced current generated by magnetic flux flowing through the core connection portion L. The magnetic pole assembly core 33A includes a first core portion 33A1 and a second core portion 33A2 separated in the rotational direction. The two core portions 33A1 and 33A2 have mutually separated surfaces 33e. (Hereinafter, this surface 33e is referred to as the slit surface.) A slit S3 is formed between the two slit surfaces 33e. The two core portions 33A1 and 33A2 have symmetrical shapes separated by the slit S3. The slit S3 reaches the surface of the excitation portion Fs side of the magnetic pole assembly core 33A.

[0259] like Figure 13B As shown, the first core portion 33A1 and the second core portion 33A2 are connected to the annular yoke core portion 33D via a connecting mechanism Li. A slit S3 and a fitting hole into which the core connecting portion L are embedded are formed through these three core portions 33A1, 33A2, and 33D. Specifically, the yoke core portion 33D has a recess 33d on the surface facing the excitation portion Fs (see reference). Figure 13A Each of the core portions 33A1 and 33A2 has a surface 33i facing the yoke core portion 33D. (Hereinafter, surface 33i is referred to as the "connecting surface"). The connecting surface 33i has a locking portion 55a that constitutes the connecting mechanism Li1. A fitting hole for the core connecting portion L to be inserted is formed through the connecting surface 33i and the inner surface of the recess 33d, and a slit S3 formed between the two core portions 33A1 and 33A2 is connected to the fitting hole.

[0260] Furthermore, the construction used to form the slit S3 and the fitting hole into which the core connector L is embedded is not limited to the example described here. For example, the fitting hole into which the core connector is embedded may also be formed in the common base 33b of the magnetic pole group core 33A. In this case, the slit S3 may also extend from the fitting hole toward the excitation part Fs. In this case, the magnetic pole group core 33A may not have two core parts 33A1 and 33A2 that are divided from each other. In other words, the two core parts 33A1 and 33A2 may be connected through a portion other than the slit S3.

[0261] Furthermore, in other examples, a surface can also be formed on the inner circumferential surface of the yoke core 33D (the surface opposite to the excitation part Fs) that is similar to... Figure 7 The example shown uses the same fitting hole 33g. In this case, the slit S5 (see reference) intersects the closed curve between the multiple fitting holes 33g and the multiple magnetic pole groups G1, and surrounds the axis Ax. Figure 9A as well as Figure 9B It can be formed in the core 33D of the magnetic yoke.

[0262] like Figure 13B As shown, the connecting mechanism Li1 consists of an engaging portion 55a and a engaged portion 55b. In the example shown, the engaging portion 55a is formed in the partial cores 33A1 and 33A2, and the engaged portion 55b is formed in the yoke partial core 33D. The engaging portion 55a is a protrusion protruding from the connecting surface 33i of the pole group partial core 33A. On the other hand, the engaged portion 55b is a recess into which the engaging portion 55a is inserted. Alternatively, in contrast to the example of the armature portion Am6, the engaging portion 55a, as a protrusion, is formed in the yoke partial core 33D, and the engaged portion 55b, as a recess, is formed in the pole group partial core 33A.

[0263] like Figure 13B As shown, when the magnetic pole assembly core 33A is connected to the magnetic yoke core 33D via the connecting mechanism Li1, the connecting surface 33i of the magnetic pole assembly core 33A is in contact with the magnetic yoke core 33D, and the magnetic pole assembly core 33A and the magnetic yoke core 33D are magnetically coupled.

[0264] The connection structure between the core 33A of the magnetic pole assembly and the core 33D of the yoke assembly is not limited to... Figure 13A as well as Figure 13B The example shown. For example, the magnetic pole assembly core 33A and the yoke core 33D may not have a connecting mechanism Li1, but are connected to each other by bonding or hard welding of those mating surfaces, or by resin molding.

[0265] The segmented structure of the armature core is not limited to Figure 13A as well as Figure 13B The example shown is an example of an armature core that may have multiple sub-cores arranged in the rotational direction. In this case, magnetic pole groups G1 and G2 may be formed in each sub-core. Furthermore, fitting holes for the core connecting portion L and slits S3 extending from the fitting holes toward the excitation portion Fs may be formed in each sub-core. The multiple sub-cores are components formed separately from each other, and two adjacent sub-cores in the rotational direction can be connected to each other via a connecting mechanism Li1 and magnetically coupled. Moreover, the multiple sub-cores can be integrally formed into a ring-shaped armature core. In this type of armature core construction, compared to the case where the entire armature core is composed of a single laminated steel plate, the yield of core material during armature core manufacturing can be improved.

[0266] like Figure 13A As shown, the magnetic pole 33a of the core 33A of the magnetic pole assembly can have a main body protruding toward the excitation section Fs, and a protrusion 33n extending axially from the main body. This increases the area of ​​the front end face of the magnetic pole 33a (the area of ​​the face facing the excitation section Fs), reducing the magnetic reluctance caused by the gap between the excitation section Fs and the magnetic pole 33a. Furthermore, since the protrusion 33n functions not only as part of the excitation cores 22N and 22S, but also as part of the flow path for the axially flowing magnetic flux, it can mitigate the magnetic saturation of the excitation cores 22N and 22S.

[0267] like Figure 13A As shown, the magnetic pole assembly core 33A has an end located axially upwards ( Figure 13A The armature consists of multiple end steel plates 33E (top and bottom) and multiple main steel plates 33F disposed between them. The front ends of the magnetic poles of the end steel plates 33E are bent toward the second armature core H2, forming protrusions 33n. In the example shown in the figure, the front ends of the two end steel plates 33E at the top and the two end steel plates 33E at the bottom are bent. The number of end steel plates 33E forming the protrusions 33n can be one or more. In addition, this shape of the magnetic pole 33a (protrusions 33n) can also be applied to an integrally formed armature core (e.g., Figure 1A The armature core H1 shown does not have a partial core.

[0268] like Figure 13A As shown, a fitting hole 34h is formed in the yoke portion 34c of the second armature core H2, which is embedded into the core connection portion L. Furthermore, the second armature core H2 has a slit S4 extending from the fitting hole 34h toward the excitation portion Fs. Additionally, a hole 34e is formed between two adjacent fitting holes 34h. This hole 34e allows for weight reduction of the armature portion Am6.

[0269] The inner diameter of the second armature core H2 (the inner diameter of the yoke portion 34c) can also be the same as the inner diameter of the first armature core H1 (the inner diameter of the yoke portion core 33D). In this way, by placing a cylindrical support member inside the second armature core H2 and the first armature core H1, they can be firmly fixed.

[0270] like Figure 13AAs shown, the magnetic pole 34a of the second armature core H2 also has a main body protruding toward the excitation section Fs, and a protrusion 34n extending axially from the main body. The second armature core H2 is formed of laminated steel plates and has end steel plates 34E and a main body steel plate 34F. The end steel plates 34E are disposed on the side of the first armature core H1 relative to the main body steel plate 34F. Like the first armature core H1, the second armature core H2 has multiple (two in the example shown) end steel plates 34E at its axial end. The number of end steel plates 34E can be one or more. In the end steel plates 34E, the front end of the magnetic pole 34a is longer than the other steel plates and bends toward the first armature core H1, forming the protrusion 34n. This increases the area of ​​the front end face of the magnetic pole 34a (the area of ​​the face facing the excitation section Fs) and reduces the magnetic resistance caused by the gap between the excitation section Fs and the magnetic pole 34a. In addition, since the protrusion 34n can function not only as the excitation cores 22N and 22S, but also as part of the flow path of the magnetic flux flowing in the axial direction, it can alleviate the magnetic saturation of the excitation cores 22N and 22S.

[0271] (An example with two in-phase coils with different winding directions)

[0272] Rotary motors can have two coils with opposite winding directions for each phase (e.g., U phase, V phase, W phase). Figure 14A as well as Figure 14B An armature portion Am7 of a rotary electric motor having this structure is shown as another example of a rotary electric motor proposed in this invention. Figure 14A This is an exploded three-dimensional view of the armature section Am7. Figure 14B This is a diagram showing the positions of the magnetic poles of the armature section Am7. The values ​​in the diagram are expressed as electrical angles (distances) in the direction of rotation. Here, it is compared with... Figure 1A The explanation will focus on the differences in the armature section Am1 of the rotary electric machine M1 shown. Figure 14A as well as Figure 14B Matters not described in the armature section Am7 shown can also be applied. Figure 1A The structure of the rotary motor M1 is described here. The armature structure described here applies not only to the radial clearance type rotary motor shown in the figure, but also to linear motors and axial clearance type rotary motors.

[0273] The armature section Am7 has multiple coils CL, with two coils CL having opposite winding directions for each phase. The rotary motor with the armature section Am7 is a rotary motor supplied with three-phase AC. Therefore, the multiple coils CL, as... Figure 14AAs shown, it has a U+ phase coil Clu+, a U- phase coil Clu-, a V+ phase coil CLv+, a V- phase coil CLv-, a W+ phase coil CLw+, and a W- phase coil CLw-. These six coils CL are respectively disposed in the magnetic pole group G1 of the first armature core H1 and arranged in the direction of rotation. Figure 14A as well as Figure 14B In the diagram, G1u+, G1v+, G1w+, G1u-, G1v-, and G1w- are shown as magnetic pole group G1.

[0274] like Figure 14B As shown, the six pole pairs P, each with six coils CL, are referred to as pole pair Pu+, Pv+, Pw+, Pu-, Pv-, and Pw-. These six pole pairs P have the same structure. That is, the number of poles 33a and 34a is the same across the multiple pole pairs Pu+, Pv+, Pw+, Pu-, Pv-, and Pw-. The spacing between poles 33a and 34a is also substantially the same across the multiple pole pairs Pu+, Pv+, Pw+, Pu-, Pv-, and Pw-. The width and height of poles 33a and 34a are also substantially the same across the multiple pole pairs Pu+, Pv+, Pw+, Pu-, Pv-, and Pw-. Each of the magnetic pole pairs Pu+, Pv+, Pw+, Pu-, Pv-, and Pw- has a core connecting part L. Each core connecting part L is located on the opposite side of the excitation part Fs, separated by a coil CL, and the position of the core connecting part L in the rotation direction coincides with the center of the magnetic pole pairs G1 and G2 in the rotation direction. When one magnetic pole pair (e.g., Pu+) is rotated about the axis Ax, it becomes another magnetic pole pair P (e.g., Pv+, Pw+, Pu-, Pv-, and Pw-).

[0275] exist Figure 14BIn this context, we focus on two pole pairs P, each with a coil CL that is in phase but wound in opposite directions. For example, considering pole pairs Pu+ and Pu-, they are substantially separated by "360 × (q + 1 / 2)" degrees in electrical degrees. (q: an integer greater than or equal to 1). That is, in the first armature core H1, there is a difference of 180 degrees in electrical degrees between the angle (distance) between the pole 33a of pole pair Pu+ and the excitation core 22N and the angle (distance) between the pole 33a of pole pair Pu- and the excitation core 22N. Therefore, for example, when the pole 33a of pole pair Pu+ is directly opposite the excitation core 22N (when the angle (distance) between the pole 33a and the excitation core 22N is 0 degrees), the pole 33a of pole pair Pu- is located at a position offset by 180 degrees in electrical degrees relative to the excitation core 22N and is directly opposite the excitation core 22S. In the second armature core H2, there is also a difference of 180 degrees in electrical degrees between the angle (distance) between the magnetic pole 34a of the pole pair Pu+ and the excitation core 22S, and between the magnetic pole 34a of the pole pair Pu- and the excitation core 22S. In the armature part Am7, q = 18. Therefore, the angle between the pole pairs Pu+ and Pu- is 6,660 degrees in electrical degrees. Furthermore, in this description, the angle between the pole pairs Pu+ and Pu- specifically refers to the angle (distance) between the center of the pole pair G1u+ and the center of the pole pair G1u- in the rotational direction, and the angle (distance) between the center of the pole pair G2u+ and the center of the pole pair G2u- in the rotational direction. The same applies to the other pole pairs Pv+, Pv-, Pw+, and Pw-.

[0276] Furthermore, consider two pole pairs P with coils CL having the same winding direction. For example, consider pole pairs Pv+ and Pw+. In the first armature core H1, there is a difference of 120 degrees in electrical degrees between the angle (distance) between the pole 33a of pole pair Pv+ and the excitation core 22N and the angle (distance) between the pole 33a of pole pair Pw+ and the excitation core 22N. Therefore, for example, when the pole 33a of pole pair Pv+ is directly opposite the excitation core 22N (when the angle (distance) between the pole 33a and the excitation core 22N is 0 degrees), the pole 33a of pole pair Pw+ is located at a position offset by 120 degrees in electrical degrees relative to the excitation core 22N. In the second armature core H2, there exists a difference of 120 degrees, measured in electrical degrees, between the angle (distance) between the magnetic pole 34a of the pole group relative to Pv+ and the excitation core 22S, and between the magnetic pole 34a of the pole group relative to Pw+ and the excitation core 22S. That is, as... Figure 14B As shown, the magnetic pole pair Pv+ and the magnetic pole pair Pw+ are actually separated by "360×(n+m / s)" degrees by electrical angle.

[0277] s: Phase number

[0278] m: an integer greater than 1 and less than s-1 (excluding divisors of s (excluding 1) and multiples of divisors of s (excluding 1)).

[0279] n: an integer greater than or equal to 1

[0280] In the armature section Am7, s = 3 and n = 12. Furthermore, when m = 1, the pole pair Pv+ and pole pair Pw+ are 4,440 degrees apart by an electrical angle. This also applies to the angles between other pole pairs P with coils CL having the same winding direction (e.g., the angle between pole pairs Pu+ and Pw+, and the angle between pole pairs Pv+ and Pu+). This relative position of the pole pairs P and the excitation section Fs can also be applied to linear motors and axial backlash type rotary motors.

[0281] Furthermore, ensure that the distance between the two pole pairs P of the coil CL with the same winding direction is expressed as "(360 / p)×(n+m / s)" degrees in mechanical angle measurement. Additionally, the angle between these two pole pairs P is also expressed as "360 / s / c" degrees in mechanical angle measurement.

[0282] p: (Number of poles in the excitation section) / 2

[0283] c: The number of coil pairs for each phase

[0284] Therefore, "(360 / p)×(n+m / s)" is substantially equal to "360 / s / c". In the armature section Am7, the number of poles of the excitation section Fs is, for example, 74 (p=37). Furthermore, s=3 and c=1. Therefore, the angle between two adjacent pole pairs P of coils CL with the same winding direction is 120 degrees in mechanical angle. In other words, the number of poles (p×2), the number of coil pairs (s×c), and the number of poles 33a and 34a of the excitation section Fs are set in such a way that "(360 / p)×(n+m / s)" is substantially equal to "360 / s / c".

[0285] in addition, Figure 14A as well as Figure 14B In the example shown, a coil with a concentrated winding (e.g., CLu-) wound on a single pole group (e.g., pole group G1u-) is obtained. However, the coil can be obtained, for example, by lap winding or wave winding.

[0286] In the armature core of a coil with overlapping windings, for example, the U+ phase coil CLu+ is wound around three adjacent pole groups G1w-, G1u+, and G1v-, and the U- phase coil CLu- is wound around three adjacent pole groups G1w+, G1u-, and G1v+. The coils of the remaining phases CLv+, CLv-, CLw+, and CLw- are also wound around three adjacent pole groups in the same way.

[0287] In the armature core of a coil with waveform windings, for example, three adjacent pole groups G1w+, G1u-, and G1v+ are arranged between the U+ phase coil CLu+ (the wire of the U+ phase) and the U- phase coil CLu- (the wire of the U- phase). Three adjacent pole groups G1u-, G1v+, and G1w- are arranged between the V+ phase coil CLv+ (the wire of the V+ phase) and the V- phase coil CLv- (the wire of the V- phase). Three adjacent pole groups G1v+, G1w-, and G1u+ are arranged between the W+ phase coil CLw+ (the wire of the W+ phase) and the W- phase coil CLw- (the wire of the W- phase).

[0288] Furthermore, the configuration of the coils CL in the armature section Am7 is not limited to the example shown in the figure. For example, two pole pairs P (e.g., pole pairs Pu+ and Pu-) that generate magnetic fields of opposite poles due to different winding directions and are respectively provided with two coils CL of the same phase can be adjacent in the rotational direction. In this case, pole pairs Pv+ and Pv- can also be adjacent in the rotational direction, as can pole pairs Pw+ and Pw-.

[0289] (Examples where the phase number is even)

[0290] The number of phases of the alternating current supplied to the rotating electric machine can be even. For example, the number of phases of the alternating current can be 2. Figure 15A as well as Figure 15B The armature portion Am8 of a rotary electric motor having this structure is shown as another example of a rotary electric motor proposed in this invention. Figure 15A This is an exploded three-dimensional view of the armature section Am8. Figure 15B This is a diagram showing the positions of the magnetic poles of the armature section Am8. The values ​​in the diagram are expressed as electrical angles (distances) in the direction of rotation. Here, it is compared with... Figure 1A The explanation will focus on the differences in the armature section Am1 of the rotary electric machine M1 shown. Figure 15A as well as Figure 15B The armature section Am8 shown, unless otherwise described, can also be constructed using the same method as the rotary electric machine M1. The armature section construction described here applies not only to the radial clearance type rotary electric machine shown in the figure, but also to linear motors and axial clearance type rotary electric machines.

[0291] In the armature section Am8, multiple coils CL are as follows: Figure 15B As shown, it includes phase A+ coil CLa+, phase B+ coil CLb+, phase A- coil CLa-, and phase B- coil CLb-. Phase A- coil CLa- and phase B- coil CLb- are coils wound in the opposite direction to phase A+ coil CLa+ and phase B+ coil CLb+. The first armature core H1 has four coils CL for each phase. Coils CL are wound on the pole group G1. Figure 15A In the diagram, G1 is represented by magnetic pole group G1, which includes G1a+, G1a-, G1b+, and G1b-.

[0292] Magnetic pole group G1, together with magnetic pole group G2 arranged axially, constitutes magnetic pole pair P. The four magnetic pole pairs P, each with four coils CLa+, CLb+, CLa-, and CLb-, are respectively named magnetic pole pair Pa+, magnetic pole pair Pb+, magnetic pole pair Pa-, and magnetic pole pair Pb-. These four magnetic pole pairs P have substantially the same structure. That is, the number of magnetic poles 33a and 34a is the same in all magnetic pole pairs Pa+, Pb+, Pa-, and Pb-. The spacing between magnetic poles 33a and 34a is also substantially the same in all magnetic pole pairs Pa+, Pb+, Pa-, and Pb-. Furthermore, the width and / or height of magnetic poles 33a and 34a are also substantially the same in all magnetic pole pairs Pa+, Pb+, Pa-, and Pb-. A core connecting portion L is provided in each of the multiple magnetic pole pairs Pa+, Pb+, Pa-, and Pb-. Each core connection L is located on the opposite side of the excitation part Fs, separated by the coil CL. The position of the core connection L in the rotation direction coincides with the center of the magnetic pole pairs G1 and G2 in the rotation direction. When one magnetic pole pair P (e.g., Pa+) is rotated around the axis Ax, it becomes another magnetic pole pair P (e.g., Pb+, Pa-, Pb-).

[0293] Consider two pole pairs P, each with a coil CL in phase but with opposite winding directions. For example, when considering pole pairs Pa+ and Pa-, in the first armature core H1, there is a difference of 180 degrees in electrical degrees between the angle (distance) between the pole 33a of pole pair Pa+ and the excitation core 22N and the angle (distance) between the pole 33a of pole pair Pa- and the excitation core 22N. Therefore, for example, when the pole 33a of pole pair Pa+ is directly opposite the excitation core 22N (when the angle (distance) between the pole 33a and the excitation core 22N is 0 degrees), the pole 33a of pole pair Pa- is located at a position offset by 180 degrees in electrical degrees relative to the excitation core 22N, directly opposite the excitation core 22S. In the second armature core H2, there is also a difference of 180 degrees in electrical degrees between the angle (distance) between the magnetic pole 34a of the magnetic pole group relative to Pa+ and the excitation core 22S and the angle (distance) between the magnetic pole 34a of the magnetic pole group relative to Pa- and the excitation core 22S.

[0294] That is, such as Figure 15B As shown, the magnetic pole pair Pa+ and the magnetic pole pair Pa- are substantially separated by "360 × (q + 1 / 2)" degrees in electrical degrees. (q: an integer greater than or equal to 1)

[0295] In the armature section Am8, q = 8, and the pole pair Pa+ and pole pair Pa- are separated by 3,060 degrees in electrical angle. In this description, the angle between pole pairs Pa+ and Pa- specifically refers to the angle (distance) between the centers of pole pairs G1a+ and G1a- in the rotational direction, and the angle (distance) between the centers of pole pairs G2a+ and G2a- in the rotational direction. This also applies to other pole pairs Pb+ and Pb-. Furthermore, in the rotating electric machine M8, the number of poles in the excitation section Fs is 68 (p = 34). Therefore, the angle (distance) between pole pairs Pa+ and Pa- in mechanical angle is 90 degrees (=3,060 / 34).

[0296] Consider two pole pairs P with coils CL having the same winding direction. For example, consider pole pairs Pa+ and Pb+. In the first armature core H1, there is a difference of 90 degrees in electrical degrees between the angle (distance) between the pole 33a of pole pair Pa+ and the excitation core 22N and the angle (distance) between the pole 33a of pole pair Pb+ and the excitation core 22N. Therefore, for example, when the pole 33a of pole pair Pa+ is directly opposite the excitation core 22N (when the angle (distance) between the pole 33a and the excitation core 22N is 0 degrees), the pole 33a of pole pair Pb+ is located at a position offset by 90 degrees in electrical degrees relative to the excitation core 22N. Furthermore, in the second armature core H2, there is a difference of 90 degrees, measured in electrical degrees, between the angle (distance) between the magnetic pole 34a of the pole group relative to Pa+ and the excitation core 22S, and between the magnetic pole 34a of the pole group relative to Pb+ and the excitation core 22S. That is, as... Figure 15B As shown, the magnetic pole pair Pa+ and the magnetic pole pair Pb+ are actually separated by “360×(n+m / s / 2)” degrees in electrical degrees.

[0297] s: Phase number

[0298] m: an integer greater than 1 and less than s-1 (excluding divisors of s (excluding 1) and multiples of divisors of s (excluding 1)).

[0299] n: an integer greater than or equal to 1

[0300] In the armature section Am8, s = 2 and n = 4. Furthermore, when m = 1, the pole pair Pa+ and the pole pair Pb+ are separated by 1,530 degrees on an electrical angular scale. This also applies to the angle between another pole pair P with two coils CL having the same winding direction (e.g., the angle between pole pair Pa- and pole pair Pb-). This relative position of the pole pair P and the excitation section Fs can also be applied to linear motors and axial backlash type rotary motors.

[0301] Furthermore, ensure that the distance between the two pole pairs P of the coil CL with the same winding direction is "(360 / p)×(n+m / s / 2)" degrees in mechanical angle measurement. Additionally, the angle between the two pole pairs P is also expressed as "180 / s / c" degrees in mechanical angle measurement.

[0302] p: (Number of poles in the excitation section) / 2

[0303] c: The number of coil pairs for each phase

[0304] Therefore, "(360 / p)×(n+m / s / 2)" is essentially equal to "180 / s / c". In the armature section Am8, the number of poles of the excitation section Fs is, for example, 68 (p=34). Furthermore, s=2 and c=2. Therefore, the angle between two adjacent pole pairs P is 45 degrees in mechanical angle. In other words, the number of poles (p×2), the number of coil pairs (s×c), and the number of poles 33a and 34a of the excitation section Fs are set in such a way that "(360 / p)×(n+m / s / 2)" is essentially equal to "180 / s / c".

[0305] (Example with a partially excitation core)

[0306] Figure 16 This is a cross-sectional view showing an example of the excitation section Fs. (The cut surface is parallel to the direction of rotation.) As shown in the figure, each excitation core 22N, 22S can be composed, for example, of multiple partial cores disposed between two adjacent magnets and separated in the direction of rotation. Specifically, each excitation core 22N, 22S can be composed of two partial excitation cores 22f separated in the direction of rotation, and the gap K3 between the two partial excitation cores 22f is ensured. In this way, the accumulation of dimensional errors in the excitation cores 22N, 22S and the magnet Mg can be suppressed, thereby improving the positional accuracy of the excitation cores 22N, 22S and the magnet Mg. Figure 16 The excitation section Fs shown is located on the outer side of the armature section in the radial direction. Therefore, the width of the magnet Mg and part of the excitation core 22f is fixed in the radial direction, while the gap K3 gradually increases towards the outer side in the radial direction. As a result, the excitation section Fs is cylindrical in shape.

[0307] like Figure 16As shown, the gap K3 is filled with, for example, a non-magnetic and insulating material. For example, the excitation cores 22N and 22S and the magnet Mg are fixed to each other by a fixing part 23. The fixing part 23 is formed of resin, for example. The gap K3 between adjacent excitation cores 22f is filled with the fixing part 23. According to this structure, the positional accuracy of the excitation cores 22N and 22S can be improved, and the workability of the rotary motor assembly operation can be improved. That is, when the number of poles of the excitation part increases and the distance (mechanical angle) between the excitation cores 22N and 22S decreases, the positional accuracy of the excitation cores 22N and 22S has a greater impact on the performance of the rotary motor. Furthermore, if the number of parts increases due to the increase in the number of poles, and they are fixed in a close-fitting state, the accumulation of dimensional errors in the parts may occur, leading to a decrease in the positional accuracy of the excitation core. In contrast, Figure 16 In the illustrated structure of the excitation section Fs, since each excitation core 22N, 22S is composed of two partial excitation cores 22f, and a gap K3 is provided between the two partial excitation cores 22f, the accumulation of dimensional errors can be suppressed, and the positional accuracy of the excitation cores 22N, 22S and the magnet Mg can be improved. Furthermore, since the excitation section Fs can be processed as a single unit during the assembly of the rotating electric machine, the workability of the assembly operation can be improved.

[0308] During the manufacturing process of the excitation section Fs, for example, multiple magnets Mg and multiple partial excitation cores 22f are positioned using a jig or fixture. Subsequently, they are fixed by molding with a non-magnetic and insulating material (specifically, resin 23). At this time, either all magnets Mg and all partial excitation cores 22f can be positioned and molded with resin 23, or the excitation section Fs can be divided into multiple parts and each can be molded with resin 23. In this case, the multiple parts, each molded, are arranged in the rotational direction and fixed to each other to form a ring-shaped excitation section Fs. Alternatively, each of the multiple parts can be fixed to a fixing member to form a ring-shaped excitation section Fs.

[0309] Each excitation core 22f is disposed close to the surface (N pole face, S pole face) of the magnet Mg. Each excitation core 22f can also contact the surface (N pole face, S pole face) of the magnet Mg. Each excitation core 22f can also be fixed to the surface of the magnet Mg by means of an adhesive. As a result, the gap between the magnet Mg and the excitation cores 22N and 22S disappears, thereby preventing the magnetic force from decreasing.

[0310] Each excitation core 22f is formed of stacked steel plates. That is, each excitation core 22f is formed of multiple steel plates 22e stacked in the rotational direction. In this specification, "the direction in which the multiple steel plates 22e are stacked" includes not only the actual rotational direction centered on axis Ax, but also the tangential direction of the circle centered on axis Ax at the position of the partial excitation core 22f. The width (thickness of the steel plate) of the steel plate 22e in the rotational direction is the same among the multiple steel plates 22e constituting the partial excitation core 22f. Alternatively, each partial excitation core 22f may also be composed of only a single steel plate.

[0311] Furthermore, the structure of the excitation section Fs described above can also be applied to, for example... Figure 10 The excitation unit Fs is shown, which is arranged radially inside the armature portion of the rotary electric motor. It can also be applied to linear motors or rotary electric motors with axial backlash, as described below.

[0312] Furthermore, in each excitation core 22N, 22S, a portion of the excitation core 22f may be formed from a soft magnetic powder material. In this case, a non-magnetic and insulating material can be filled into the gap between the two portions of the excitation core 22f constituting each excitation core 22N, 22S. For example, the excitation cores 22N, 22S and the magnet Mg are molded together with resin, and the gap is filled with resin. As another example, each excitation core 22N, 22S may not have multiple portions of the excitation core 22f. In this case, each portion of the excitation core 22f may also be formed from a soft magnetic powder material instead of laminated steel plates.

[0313] (Linear motor)

[0314] The electromechanical structure proposed in this invention can be applied to linear motors in which the armature and excitation parts can move relative to each other in a straight line. Figure 17 This is a perspective view showing the linear motor M10 as an example of a linear motor using the construction proposed in this invention.

[0315] In addition, the armature core with partial core described above, the armature core using soft magnetic powder material, the armature core with two coils CL with different winding directions for each phase, and the armature core with protrusions at the ends of the magnetic poles can also be used in the linear motor M10.

[0316] The linear motor M10 has an excitation section Fs and an armature section Am10. The excitation section Fs and the armature section Am10 can operate in a straight line (the direction of mechanical motion). Figure 17The relative movement occurs in the Y1-Y2 direction. (Hereinafter, the Y1-Y2 direction will be referred to as the "front-back direction"). For example, in a device for mounting a linear motor M10, the excitation unit Fs is fixed in a structure, and the armature unit Am10 is guided to move in the front-back direction. In this case, the excitation unit Fs has a length corresponding to the movable range of the armature unit Am10. Conversely, in a device for mounting a linear motor M10, the armature unit Am10 is fixed in a structure, and the excitation unit Fs is guided to move in a straight line direction.

[0317] The excitation section Fs has multiple magnets Mg arranged in the front-to-back direction. Each magnet Mg is magnetized in the front-to-back direction. Similar to the excitation section Fs of a rotary electric machine M1, the magnets Mg in the excitation section Fs are arranged with their surfaces (magnetic pole faces) of the same polarity facing each other. A magnet Mg is positioned between two adjacent excitation cores 22N, 22S. Each excitation core 22N, 22S can be composed of partial excitation cores 22f separated in the front-to-back direction. The partial excitation cores 22f can be formed from laminated steel plates or from a soft magnetic powder material.

[0318] Armature section Am10 has a left-right direction ( Figure 17 The figure shows multiple armature cores H1 and H2 arranged in the X1-X2 direction, along with a core connection L. As shown, the armature portion Am10, for example, has a first armature core H1 and two second armature cores H2. The first armature core H1 is positioned between the two second armature cores H2. The first armature core H1 and the second armature cores H2 are magnetically coupled only through the core connection L, and magnetically separated in the region other than the core connection L.

[0319] The armature portion Am10 can be molded using resin. In this case, the resin used to mold the armature cores H1 and H2 can be filled into the gap between the first armature core H1 and the second armature core H2. The number of armature cores constituting the armature portion Am10 is not limited to the example shown in the figure. The armature portion Am10 can be composed of, for example, one first armature core H1 and one second armature core H2. The armature cores H1 and H2 are, for example, laminated steel plates formed by overlapping multiple electromagnetic steel plates in the left-right direction.

[0320] like Figure 17 As shown, the first armature core H1 has multiple pole groups G1 arranged in the front-back direction, each of the multiple pole groups G1 having multiple magnetic poles 33a arranged in the front-back direction. The second armature core H2 also has multiple pole groups G2 arranged in the front-back direction. Each of the multiple pole groups G2 has multiple magnetic poles 34a arranged in the front-back direction. Each coil CL is wound around the magnetic poles 33a constituting the pole group G1.

[0321] The first armature core H1 has a yoke portion 33c extending in the front-rear direction. Furthermore, the second armature core H2 has a yoke portion 34c extending in the front-rear direction. Multiple magnetic poles 33a and 34a protrude from the yoke portions 33c and 34c toward the excitation portion Fs, and magnetic pole groups G1 and G2 are formed on the excitation portion Fs side of the yoke portions 33c and 34c. The multiple magnetic pole groups G1 arranged in the front-rear direction are magnetically connected via the yoke portion 33c. Furthermore, the multiple magnetic pole groups G2 arranged in the front-rear direction are also magnetically connected via the yoke portion 34c.

[0322] The linear motor M10 is, for example, a three-phase AC driven linear motor, with a U-phase coil CL1, a V-phase coil CLv (not shown), and a W-phase coil CLw (not shown) disposed in the first armature core H1. These three coils CL are respectively disposed in three pole groups G1. The number of phases of the AC supplied to the linear motor is not limited to three.

[0323] like Figure 17 As shown, the pole group G2 of the second armature core H2 is located in the left-right direction relative to the pole group G1 of the first armature core H1, and together with the pole group G1, forms a pole pair P. The positional relationship between the magnetic pole 33a constituting the pole group G1 and the magnetic pole 34a constituting the pole group G2 can be the same as the relationship between the rotating motor M1 and the magnetic poles 33a and 34a. That is, the position of the magnetic pole 33a of the pole group G1 is offset by, for example, 180 degrees from the position of the magnetic pole 34a of the pole group G2 by an electrical angle.

[0324] The core connector L extends in the left-right direction, magnetically coupling armature cores H1 and H2. The linear motor M10 has multiple core connectors L spaced apart and arranged in the front-rear direction. These multiple core connectors L are disposed in each of multiple pole pairs P (pairs of pole pairs G1 and G2 that are corresponding to each other in the front-rear direction). Therefore, a magnetic circuit is formed between the pole pair G1 of the first armature core H1 and the pole pair G2 of the second armature core H2 via the core connector L.

[0325] As described above, the armature portion Am10 has one first armature core H1 and two second armature cores H2. Core connectors L magnetically couple these three armature cores (H1, H2). Each core connector L extends from the right end of the right second armature core H2 to the left end of the left second armature core H2. Alternatively, the armature portion Am10 may have two core connectors L arranged in a left-right direction. Furthermore, the first core connector L may couple the first armature core H1 to one second armature core H2, and the second core connector L may couple the first armature core H1 to another second armature core H2.

[0326] The core connection part L is located on the opposite side to the excitation part Fs, separated from the magnetic pole groups G1 and G2 and the coils CL. Figure 17In this configuration, the excitation section Fs is positioned below the armature cores H1 and H2, and the core connecting section L is positioned above the armature cores H1 and H2. This allows for the suppression of magnetic flux Φ1 and Φ2 flowing through the two pole groups G1 and G2 separated in the longitudinal direction (see reference). Figure 3B ) and the magnetic flux Φ7 flowing in the core connection part L (refer to Figure 3B Interference occurred.

[0327] The core connection portion L is a stacked steel plate comprising multiple steel plates stacked in a direction intersecting the stacking directions of the steel plates of the armature cores H1 and H2. Specifically, the core connection portion L is a stacked steel plate comprising multiple steel plates stacked in a front-back direction. This allows for the suppression of induced currents in the steel plates of the core connection portion L.

[0328] The core connector L magnetically couples the yokes 33c and 34c. In the armature section Am10, the yokes 33c and 34c are on the side opposite to the excitation section Fs ( Figure 17 In the example, the upper surfaces of armature cores H1 and H2 have fitting holes 33g and 34g. The core connector L is inserted into these fitting holes 33g and 34g. The fitting holes 33g and 34g open in a direction intersecting the stacking direction of the steel plates constituting the armature cores H1 and H2. The fitting holes 33g and 34g open towards the side opposite to the excitation section Fs (facing upwards). This structure prevents the generation of induced currents in the armature cores H1 and H2 due to magnetic flux flowing through the core connector L.

[0329] Alternatively, unlike the armature section Am10, the fitting hole of the core connector L may be inserted into a... Figure 1A The rotary motor M1 also has a fitting hole that passes through the yoke portions 33c and 34c and has a closed inner surface. That is, the fitting hole may not open upwards. In this case, slits S3 and S4 extending from the fitting hole toward the excitation portion Fs may also be formed (see reference). Figure 1C as well as Figure 1D ).

[0330] As another example, the core connector L can also be integrally formed with either armature core H1 or H2. In the armature portion Am10, one or both of the armature cores H1 and H2 can be formed of a soft magnetic powder material. In this case, the armature core formed of the powder material and the core connector can be integrally formed.

[0331] The width of the core connector L in the front-to-back direction can be smaller than the width of the magnetic pole groups G1 and G2 in the front-to-back direction. Therefore, the magnetic flux Φ7 (refer to) flowing through the core connector L between the two magnetic pole groups G1 and G2 constituting the magnetic pole pair P can be formed more effectively. Figure 3B) and the magnetic fluxes Φ1, Φ2 (refer to) flowing between two magnetic pole groups G1 (and two magnetic pole groups G2) separated in the front-back direction and in the rear-back direction. Figure 3B Both of them.

[0332] For example, with Figure 1C as well as Figure 1D The example shown is also preferably in which one or more of the front-end magnetic poles 33a constituting each magnetic pole group G1 are located further forward than the front end of the core connecting portion L, and one or more of the rear-end magnetic poles 33a are located further rear than the rear end of the core connecting portion L. Similarly, it is also preferably in which one or more of the front-end magnetic poles 34a constituting each magnetic pole group G2 are located further forward than the front end of the core connecting portion L, and one or more of the rear-end magnetic poles 34a are located further rear than the rear end of the core connecting portion L.

[0333] The linear motor M10, like the rotary motor described above (e.g., rotary motor M1), has two magnetic circuits. Specifically, the first magnetic circuit includes two pole groups G1 separated in the front-to-back direction, two pole groups G2 separated in the front-to-back direction, excitation cores 22N and 22S opposite to pole groups G1 and G2, and a magnet Mg between the excitation cores 22N and 22S. For example, as... Figure 3B As illustrated, when the angle difference between the excitation core 22N of the excitation section Fs and the magnetic pole 33a of the magnetic pole group G1u is 0 degrees (electric angle), magnetic fluxes Φ1 and Φ2 are formed through the magnet Mg in the first magnetic circuit.

[0334] The second magnetic circuit includes a core connector L, magnetic pole groups G1 and G2 arranged in the left-right direction and magnetically coupled through the core connector L, excitation cores 22N and 22S opposite to magnetic pole groups G1 and G2, and a magnet Mg between the excitation cores 22N and 22S. For example, as Figure 3B As illustrated, when the angle difference between the excitation core 22N of the excitation section Fs and the magnetic pole 33a of the magnetic pole group G1u is 0 degrees (electric angle), a magnetic flux Φ7 is formed in the second magnetic circuit through the magnet Mg. The magnetic fluxes Φ1, Φ2, and Φ7 pass through the inner side of the coil CL of the magnetic pole group G1.

[0335] According to this linear motor M10, it is no longer necessary to magnetically divide each armature core H1, H2 in the front-to-back direction. Therefore, the strength of the armature cores H1, H2 can be increased. Furthermore, magnetic flux is formed in the magnetic circuit including the core connection part L and the magnetic circuit including the two magnetic pole groups G1, G2 arranged in the front-to-back direction. Therefore, magnetic saturation of the magnetic circuit can be suppressed. As a result, for example, the width of the yoke parts 33c, 34c can be narrowed, thereby making it easier to miniaturize and lighten the armature part Am10. This effect is particularly significant when the number of magnetic poles 33a, 34a constituting one magnetic pole group G1, G2 is increased. In addition, since the magnetic flux that saturates the magnetic circuit can be increased without increasing the width of the yoke parts 33c, 34c, the current supplied to the coil CL can be increased, thereby increasing the output torque of the rotary motor.

[0336] (Multiple armature cores located in different directions relative to the excitation section)

[0337] In the electrical machinery described above (e.g., Figure 1A In the rotary motor M1 illustrated, multiple armature cores H1 and H2 are located in the same direction relative to the excitation section Fs. Alternatively, the first armature core H1 may be located in a first direction relative to a first surface of the excitation section Fs, and the second armature core H2 may be located in a second direction relative to a second surface of the excitation section Fs. Here, the first and second directions are, for example, two directions that are opposite to each other or two directions that intersect each other. In this configuration, the armature section may also have a core-connecting structure (e.g., multiple core-connecting sections L arranged in the mechanical direction of operation) that magnetically couples the multiple armature cores H1 and H2. This configuration can be applied to both rotary and linear motors.

[0338] The following description uses examples of a structure where the angle between the first and second directions is 180 degrees (i.e., a structure where the first and second directions are opposite to each other) and a structure where the angle between the first and second directions is 90 degrees, with reference to the diagram. The angle between the first and second directions is not limited to these; it can be less than 90 degrees or greater than 90 degrees but less than 180 degrees.

[0339] (An example where the armature core is positioned on the opposite side across the excitation section)

[0340] Figures 18A to 18C The radial clearance type rotary motor M21 is shown as an example of an electrical machine having a first armature core H1 and a second armature core H2 with different relative positions to the excitation part Fs. Figure 18A This is a 3D diagram of the M21 rotary electric motor. Figure 18B This is an exploded 3D view of the rotary motor M21. Figure 18C This is a diagram showing the magnetic flux generated in the rotating electric machine M21. The following is in comparison with... Figure 1AThe explanation will focus on the differences in the rotary motor M1 described in the previous section. Figures 18A to 18C The following matters not described in the rotary motor M21 shown can be applied: Figure 1A Examples.

[0341] like Figure 18A As shown, in the rotary electric motor M21, the first armature core H1 and the second armature core H2 are arranged on opposite sides of the excitation section Fs, separated by the excitation section Fs. The excitation section Fs is cylindrical. The first armature core H1 is arranged radially outward (first direction) relative to the outer peripheral surface (first surface) of the excitation section Fs, and the second armature core H2 is arranged radially inward (second direction) relative to the inner peripheral surface (second surface) of the excitation section Fs. Ideally, the excitation cores 22N and 22S of the excitation section Fs are exposed on both the inner and outer sides. This reduces the magnetic reluctance between the excitation section Fs and the armature cores H1 and H2. Alternatively, opposite to the rotary electric motor M21, the first armature core H1 may be located radially inward relative to the inner peripheral surface of the excitation section Fs, and the second armature core H2 may be located radially outward relative to the outer peripheral surface of the excitation section Fs.

[0342] like Figure 18B As shown, the first armature core H1 has multiple magnetic pole groups G1 arranged in the rotational direction, which are magnetically coupled via the yoke 33c. The rotating motor M21 is, for example, a three-phase AC rotating motor, and the first armature core H1 is provided with a U-phase coil CLu, a V-phase coil CLv, and a W-phase coil CLw. These three coils CLu, CLv, and CLw are respectively disposed in three magnetic pole groups G1u, G1v, and G1w. The winding directions of the three coils CL can be the same. The magnetic pole group G1 has multiple magnetic poles 33a, which are radially opposed to the excitation cores 22N and 22S of the excitation section Fs. The second armature core H2 also has multiple magnetic pole groups G2 arranged in the rotational direction, which are magnetically coupled via the yoke 34c. The magnetic pole group G2 has multiple magnetic poles 34a, which are radially opposed to the excitation cores 22N and 22S of the excitation section Fs. Two opposing magnetic pole groups G1 and G2, separated by the excitation section Fs, constitute a magnetic pole pair P. In the example shown in the figure, each magnetic pole group G1 consists of 5 magnetic poles 33a, and each magnetic pole group G2 consists of 6 magnetic poles 34a. The number of magnetic poles 33a and 34a constituting each magnetic pole group G1 and G2 is not limited to this.

[0343] In the rotary electric machine M21, the number of poles of the excitation section Fs is, for example, 76 (p = 38). The electrical angle between adjacent pole pairs P is expressed as 360 × (n + m / s), for example, 2,280 degrees. Furthermore, the mechanical angle between adjacent pole pairs P is expressed as "(360 / p) × (n + m / s)," which is essentially the same as "360 / s / c". This mechanical angle in the rotary electric machine M21 is, for example, 60 degrees (in the rotary electric machine M21, s = 3, m = 1, n = 6, and c = 2).

[0344] like Figure 18B As shown, the armature portion Am21 has multiple core connectors L arranged at intervals in the rotational direction. The multiple core connectors L are disposed in each of the multiple pole pairs P. Pole pairs G1 and G2 are formed on the excitation portion Fs side of the yoke portions 33c and 34c. Each core connector L magnetically couples the yoke portions 33c and 34c. Furthermore, the position of the core connectors L in the rotational direction corresponds to the position of the pole pairs G1 and G2 constituting the pole pairs P. Specifically, the center of the core connector L in the rotational direction coincides with the center of the pole pairs G1 and G2 in the rotational direction.

[0345] like Figure 18B As shown, the yoke 33c has a fitting hole 33h located on the side opposite to the excitation part Fs, separated by the magnetic pole group G1, and the yoke 34c has a fitting hole 34h located on the side opposite to the excitation part Fs, separated by the magnetic pole group G2. The fitting holes 33h and 34h are holes that pass through the armature cores H1 and H2 in the axial direction. The ends of each core connecting part L are inserted into the fitting holes 33h and 34h in the axial direction, magnetically coupling the yokes 33c and 34c. The two ends of the core connecting part L are located on opposite sides separated by the coil CL. Each core connecting part L has an extension L3 extending in the radial direction, and fitting parts L1 and L2 extending axially from the two ends of the extension L3. The fitting part L1 is inserted into the fitting hole 33h of the first armature core H1, and the fitting part L2 is inserted into the fitting hole 34h of the second armature core H2.

[0346] The magnetic flux formed in the armature Am21 and the reference Figure 3B The magnetic flux used in the explanation is essentially the same. Specifically, as... Figure 18CAs shown, when the angle difference between the excitation core 22N of the excitation section Fs and the magnetic pole 33a of the magnetic pole group G1u is 0 degrees (electric angle), magnetic fluxes Φ1, Φ2, and Φ7 of the magnet Mg are formed between the armature section Am21 and the excitation section Fs. The first magnetic circuit for forming magnetic flux Φ1 includes, for example, the magnetic pole groups G1u and G1v of the first armature core H1, the magnetic pole groups G2u and G2v of the second armature core H2, the excitation cores 22N and 22S, and the magnet Mg between the excitation cores 22N and 22S. Similarly, another first magnetic circuit is a magnetic circuit for forming magnetic flux Φ2, which includes the magnetic pole groups G1u and G1w of the first armature core H1, the magnetic pole groups G2u and G2w of the second armature core H2, the excitation cores 22N and 22S, and the magnet Mg between the two excitation cores. One of the second magnetic circuits with flowing magnetic flux Φ7 includes the magnetic pole group G1u of the first armature core H1, the core connection L, the magnetic pole group G2u of the second armature core H2, the excitation cores 22N and 22S, and the magnet Mg between the two excitation cores 22N and 22S.

[0347] Unlike previous rotary motors, this rotary motor M21 eliminates the need for magnetic separation of the armature cores H1 and H2 in the rotational direction. Therefore, the strength of the armature cores H1 and H2 can be increased. Furthermore, magnetic flux is formed in two circuits: one containing the core connection portion L, and the other containing two pole groups (e.g., pole groups G1u and G1v) separated in the rotational direction. This suppresses magnetic saturation of the magnetic circuit. Consequently, the width of the yoke portions 33c and 34c can be narrowed, facilitating miniaturization and weight reduction of the armature portion Am21. This advantage is particularly significant when the number of poles 33a and 34a constituting one pole group G1 and G2 is increased. Moreover, since the magnetic flux that saturates the magnetic circuit can be increased without increasing the width of the yoke portions 33c and 34c, the current supplied to the coil CL can be increased, thereby increasing the output torque of the rotary motor.

[0348] In the first armature core H1 of the armature section Am21, preferably, at least two of the multiple magnetic poles 33a constituting each magnetic pole group G1, located at both ends, are positioned further outward (clockwise and counterclockwise) than the two ends of the core connecting portion L. Similarly, in the second armature core H2 of the armature section Am21, preferably, at least two of the multiple magnetic poles 34a constituting each magnetic pole group G2, located at both ends, are positioned further outward (clockwise and counterclockwise) than the two ends of the core connecting portion L. In this way, magnetic fluxes Φ1 and Φ2 flowing between the two magnetic pole groups separated in the rotational direction can be easily formed.

[0349] like Figure 18AAs shown, in the first armature core H1, a slit S3 is formed extending from each mating hole 33h and intersecting the closed curve surrounding each mating hole 33h. Similarly, in the second armature core H2, a slit S4 is formed extending from each mating hole 34h and intersecting the closed curve surrounding each mating hole 34h. These slits S3 and S4 prevent the generation of induced current around the core connection portion L. Ideally, the slits S3 and S4 are as follows: Figure 18A As shown, the opening reaches the side facing the excitation section Fs.

[0350] Furthermore, the closed circuit between the multiple fitting holes 33h and the multiple magnetic pole groups G1, and centered on the axis Ax, passing through the entire first armature core H1, is blocked by slit S3. Similarly, the closed circuit between the multiple fitting holes 34h and the multiple magnetic pole groups G2, and centered on the axis Ax, passing through the entire second armature core H2, is blocked by slit S4. Therefore, induced currents in the rotational direction can be prevented in the armature cores H1 and H2 through slits S3 and S4.

[0351] Additionally, in the first armature core H1, it is also possible to... Figure 19 As shown, a fitting hole 33g is formed that opens in a direction intersecting the stacking direction of the steel plate relative to the first armature core H1. In the example shown, the fitting hole 33g is formed on the outer peripheral surface of the first armature core H1, opening towards a side opposite to the excitation section Fs. Alternatively, it can be as follows... Figure 19 As shown, a fitting hole 34g is also formed in the second armature core H2, opening in a direction intersecting the stacking direction of the steel plate relative to the second armature core H2. In the example shown, the fitting hole 34g is formed on the inner peripheral surface of the second armature core H2, opening towards the side opposite to the excitation section Fs. In this configuration, it is also possible to prevent the generation of induced current around each core connection section L.

[0352] exist Figure 19 In the configuration, slit S5 can be formed in the first armature core H1, and slit S6 can be formed in the second armature core H2. Slits S5 and S6 intersect with a closed curve that surrounds the axis Ax between multiple magnetic pole groups G1 and G2 arranged in the rotational direction and multiple fitting holes 33g and 34g. Slits S5 and S6 can prevent the generation of rotational induced current in the entire armature cores H1 and H2. Figure 19 In the example, slits S5 and S6 extend from the fitting holes 33g and 34g to the openings facing the excitation section Fs.

[0353] It can also be different Figure 19 For example, slit S5 is formed between two adjacent magnetic pole groups G1, and opens on the side opposite to the surface of the first armature core H1 that is opposite to the surface of the excitation part Fs. Alternatively, slit S6 can be formed between two adjacent magnetic pole groups G2, and opens on the side opposite to the surface of the second armature core H2 that is opposite to the surface of the excitation part Fs.

[0354] Figure 20 This is a cross-sectional view showing an example of the excitation section Fs of the rotary electric machine M21. Its cut surface is a plane orthogonal to the axis. Figure 20 The excitation unit Fs shown has excitation cores 22N and 22S formed by stacking electromagnetic steel plates in the mechanical action direction (rotation direction in this figure). Excitation cores 22N and 22S differ from... Figure 16 The illustrated excitation section Fs is exposed on both its inner and outer peripheral surfaces. This reduces the magnetic reluctance between the first armature core H1 and the excitation section Fs, as well as the magnetic reluctance between the second armature core H2 and the excitation section Fs.

[0355] In the excitation section Fs, each excitation core 22N, 22S has two partial excitation cores 22f formed by multiple electromagnetic steel plates. A fixing part 23 is filled between the two partial excitation cores 22f. The fixing part 23 is formed, for example, by a non-magnetic and insulating material (e.g., resin). The width of the magnet Mg gradually increases towards the outer peripheral surface. Alternatively, the width of the fixing part 23 may gradually increase towards the outer peripheral surface, and the width of the partial excitation cores 22f may also gradually increase towards the outer peripheral surface.

[0356] (A linear motor with the armature core positioned on the opposite side)

[0357] Figure 18A as well as Figure 18B The armature core configuration disclosed herein can also be applied to linear motors in which the armature and excitation sections can move relative to each other in a straight line. Figure 21A as well as Figure 21B This is a diagram illustrating an example of a linear motor. Figure 21A This is a 3D diagram of the M22 linear motor. Figure 21B This is an exploded 3D view of the linear motor M22. Figure 21A In the original text, a portion of the excitation section Fs and a portion of the second armature core H2 are omitted. Here, with... Figure 18A as well as Figure 18B The differences of the radial clearance type rotary motor M21 will be explained in detail. The construction of the rotary motor M21 can be applied to matters not covered in the linear motor M22.

[0358] like Figure 21A As shown, in the linear motor M22, the excitation section Fs and the armature section Am22 can be coupled along a straight line ( Figure 21A The relative movement is in the Y1-Y2 direction. (In the linear motor M22, the Y1-Y2 direction is the mechanical movement direction, hereinafter referred to as the front-back direction.) For example, the position of the excitation part Fs is fixed, and the armature part Am22 moves back and forth in the front-back direction. At this time, the excitation part Fs can have a length corresponding to the movable range of the armature part Am22.

[0359] like Figure 21A As shown, the first armature core H1 and the second armature core H2 are in the left-right direction ( Figure 21A The first armature core H1 is positioned on opposite sides of the excitation section Fs, separated by the excitation section Fs (in the X1-X2 direction). Figure 21A The middle face (facing the X2 direction) is positioned on the left side, and the second armature core H2 is positioned relative to the right side of the excitation section Fs. Figure 21A The surface facing the X1 direction is positioned on the right side. Excitation cores 22N and 22S can be exposed on both the right and left sides. This reduces the magnetic reluctance of armature cores H1 and H2 and the excitation section Fs.

[0360] like Figure 21B As shown, the first armature core H1 has multiple pole groups G1 (G1u, G1v, G1w) arranged in the front-rear direction. Each of the multiple pole groups G1 has multiple magnetic poles 33a arranged in the front-rear direction and protruding toward the excitation section Fs. The linear motor M22 is, for example, a three-phase AC linear motor, in which the first armature core H1 is provided with a U-phase coil CLu, a V-phase coil CLv, and a W-phase coil CLw. These three coils CL are respectively provided in the three pole groups G1. The winding direction of the three coils CL can be the same. The second armature core H2 also has multiple pole groups G2 arranged in the front-rear direction. Each of the multiple pole groups G2 has multiple magnetic poles 34a arranged in the front-rear direction and protruding toward the excitation section Fs. In the example shown in the figure, only the first armature core H1 is provided with coils CL, but coils CL can also be provided in both the first armature core H1 and the second armature core H2.

[0361] Armature cores H1 and H2 are formed by stacking multiple electromagnet steel plates in a direction orthogonal to both the left-right direction (opposite to armature cores H1 and H2) and the mechanical action direction (front-back direction) (vertical direction). Alternatively, one or both of armature cores H1 and H2 may be formed of a soft magnetic powder material.

[0362] like Figure 21A As shown, the armature portion Am21 has multiple core connectors L arranged in a front-rear direction at intervals. The multiple core connectors L are disposed on each of multiple pole pairs P (pairs of pole pairs G1 and G2 facing each other across the excitation portion Fs). The pole pair G1 of the first armature core H1 is located on the excitation portion Fs side relative to the yoke portion 33c, and the pole pair G2 of the second armature core H2 is located on the excitation portion Fs side relative to the yoke portion 34c. Each core connector L magnetically couples the yoke portions 33c and 34c. The positions of the core connectors L in the front-rear direction correspond to the positions of the pole pairs P in the front-rear direction.

[0363] like Figure 21BAs shown, the yoke 33c has a fitting hole 33g located on the side opposite to the excitation part Fs, separated by the magnetic pole group G1, and the yoke 34c has a fitting hole 34g located on the side opposite to the excitation part Fs, separated by the magnetic pole group G2. The fitting holes 33g and 34g open in a direction intersecting the stacking direction of the steel plates relative to the armature cores H1 and H2 (i.e., towards the side opposite to the excitation part Fs). The ends of each core connecting part L are inserted into the fitting holes 33g and 34g, magnetically coupling the yokes 33c and 34c. Each core connecting part L is as follows... Figure 21B As shown, the device has an extension L3 extending in the left-right direction and fitting portions L1 and L2 extending downward from both ends of the extension L3. The fitting portions L1 and L2 are respectively inserted into fitting holes 33g and 34g. Since the fitting holes 33g and 34g are open, it is possible to prevent the generation of induced current around each core connecting portion L due to the magnetic flux passing through each core connecting portion L.

[0364] like Figure 21A As shown, the core connection portion L is positioned above the coil CL. Alternatively, the armature portion Am22 may have a core connection portion L located above the coil CL and a core connection portion L located below the coil CL for each pole pair P.

[0365] The linear motor M22, like the rotary motor described above (e.g., rotary motor M1), has two magnetic circuits. The first magnetic circuit includes two pole groups G1 and G2 separated in the front-rear direction, excitation cores 22N and 22S opposite to pole groups G1 and G2, and a magnet Mg between the excitation cores 22N and 22S. The second magnetic circuit includes a core connector L, pole groups G1 and G2 facing each other in the left-right direction and magnetically coupled via the core connector L, excitation cores 22N and 22S opposite to pole groups G1 and G2, and a magnet Mg between the excitation cores 22N and 22S.

[0366] like Figure 21A As shown, the width of the core connecting portion L in the front-to-back direction is smaller than the width of the magnetic pole groups G1 and G2 in the front-to-back direction. For example, preferably, one or more of the magnetic poles 33a at the front end of each magnetic pole group G1 are located further forward than the front end of the core connecting portion L, and one or more of the magnetic poles 33a at the rear end are located further rear than the rear end of the core connecting portion L. Similarly, preferably, one or more of the magnetic poles 34a at the front end of each magnetic pole group G2 are located further forward than the front end of the core connecting portion L, and one or more of the magnetic poles 34a at the rear end are located further rear than the rear end of the core connecting portion L.

[0367] The armature cores H1 and H2 of the linear motor M22 are, as described above, laminated steel plates. Among the multiple steel plates laminated in the vertical direction, the steel plates located at the ends in the lamination direction may have protrusions extending upward or downward at each magnetic pole 33a, 34a. Figure 22 This diagram illustrates an example of such a magnetic pole 33a. In the example shown, the steel plate at the end of the magnetic pole 33a has a protrusion 33n extending in the stacking direction. The protrusion 33n can be formed by bending the steel plate. This protrusion 33n can be formed on one or more steel plates at one end (e.g., the upper end) and one or more steel plates at the other end (e.g., the lower end) in the stacking direction, or it can be formed on only one of them. In other examples, the protrusion 33n may not need to be formed by bending the steel plate. For example, the end of the magnetic pole 33a in the stacking direction may be formed from a soft magnetic powder material having the protrusion 33n instead of an electromagnetic steel plate. Figure 22 The structure shown can also be applied to the second armature core H2.

[0368] (An example where the yoke and magnetic poles are separated)

[0369] The armature cores H1 and H2 in a linear motor may also have a yoke portion core formed by an electromagnetic steel plate and a pole core formed by an electromagnetic steel plate and embedded in a fitting hole formed in the yoke portion core. Figure 23 This is a diagram showing a linear motor M23 with armature cores H1 and H2. Here, regarding... Figure 21A as well as Figure 21B The differences of the linear motor M22 shown will be explained. Regarding... Figure 23 For aspects of the linear motor M23 not described herein (e.g., the distance (electrical angle) between pole pairs P or the structure of the excitation section Fs), the structures of other electromechanical devices described above can be applied. Furthermore, Figure 23 In order to represent the second armature core H2, a portion of the first armature core H1 and a portion of the excitation part Fs are omitted.

[0370] like Figure 23As shown, the first armature core H1 has a yoke portion core 33G that comprises a stacked steel plate containing multiple steel plates stacked in the left-right direction (X1-X2 direction). Furthermore, the first armature core H1 has multiple pole cores 33J arranged in the front-back direction (Y1-Y2 direction). Each pole core 33J is a stacked steel plate containing multiple steel plates stacked in the vertical direction (Z1-Z2 direction). The steel plates of the yoke portion core 33G are orthogonal to the steel plates of the pole cores 33J. Multiple fitting holes arranged in the front-back direction are formed in the yoke portion core 33G. The pole cores 33J are respectively inserted into the multiple fitting holes and magnetically coupled to the yoke portion core 33G. The portion of the pole core 33J protruding from the surface of the yoke portion core 33G toward the excitation section Fs is a pole 33a. Multiple magnetic poles 33a (5 magnetic poles 33a) constitute a magnetic pole group G1, and a coil CL is provided in each magnetic pole group G1.

[0371] like Figure 23 As shown, the second armature core H2 has a yoke portion core 34G that comprises a stacked steel plate containing multiple steel plates stacked in the left-right direction. Furthermore, the second armature core H2 has multiple pole cores 34J arranged in the front-back direction. Each pole core 34J is a stacked steel plate containing multiple steel plates stacked in the vertical direction. That is, the steel plates of the yoke portion core 34G are orthogonal to the steel plates of the pole cores 34J. Multiple fitting holes arranged in the front-back direction are formed in the yoke portion core 34G. The pole cores 34J are respectively inserted into the multiple fitting holes and magnetically coupled to the yoke portion core 34G. The portion of the pole core 34J protruding from the surface of the yoke portion core 34G toward the excitation section Fs is a pole 34a. In the linear motor M23, a pole group G2 is composed of six poles 34a.

[0372] The steel plates of the pole cores 33J and 34J are stacked vertically in the direction that intersects both the front-back direction (mechanical direction of action) and the left-right direction (opposite to the armature cores H1 and H2). Unlike the example of the linear motor M23, where the steel plates of the pole cores are stacked in the mechanical direction of action, induced currents are easily generated in the steel plates at the ends located in that direction. In contrast, in the linear motor M23, because the steel plates of the pole cores 33J and 34a are stacked vertically, the generation of such induced currents can be suppressed.

[0373] In the yoke, cores 33G and 34G, such as Figure 23The diagram shows slits S7 and S8 extending from the fitting holes into which the magnetic pole cores 33J and 34J are embedded. In the example of the linear motor M23, a slit S7 is formed between the fitting holes into which two adjacent magnetic pole cores 33J are embedded. Similarly, a slit S8 is formed between the fitting holes into which two adjacent magnetic pole cores 34J are embedded. Through these slits S7 and S8, induced currents in the yoke portions 33G and 34G due to magnetic flux flowing through the magnetic pole cores 33J and 34J can be prevented. Slits S7 and S8 may also differ from... Figure 23 The example shown extends from the fitting hole toward the edge of the yoke portion cores 33G and 34G.

[0374] like Figure 23 As shown, the armature portion Am23 has multiple core connectors L arranged in a front-rear direction at intervals. The multiple core connectors L are disposed in each of multiple pole pairs P (pairs of pole pairs G1 and G2 facing each other across the excitation portion Fs). The positions of the core connectors L in the front-rear direction correspond to the positions of the pole pairs P in the front-rear direction. The pole pairs G1 and G2 (the portions of pole cores 33J and 34J protruding from the yoke portions 33G and 34G) are located on the excitation portion Fs side relative to the yoke portions 33G and 34G. The core connectors L are magnetically coupled to the yoke portions 33G and 34G. Specifically, fitting holes 33g and 34g are formed on the upper surface of the yoke portions 33G and 34G, penetrating the yoke portions 33G and 34G. The core connectors L are inserted into and held in these fitting holes 33g and 34g.

[0375] The core connector L is a stacked steel plate comprising multiple steel plates stacked in the front-to-back direction. This arrangement and stacking of the steel plates helps to suppress induced current in the core connector L.

[0376] like Figure 23 As shown, the fitting holes 33g and 34g open in directions intersecting the stacking direction of the steel plates constituting the cores 33G and 34G of the yoke portion. Specifically, the fitting holes 33g and 34g open upwards. Therefore, it is possible to prevent the generation of induced current around each core connection portion L. The core connection portion L is located above the coil CL and the excitation portion Fs. The armature portion Am23 may have a core connection portion L located above the coil CL and the excitation portion Fs, and a core connection portion L located below the coil CL and the excitation portion Fs.

[0377] like Figure 23 As shown, in the linear motor M23, each core connecting portion L may have a first core portion L5 and a second core portion L6 arranged in the left-right direction (opposite direction of armature cores H1 and H2). The first core portion L5 is inserted into the fitting hole 33g of the first armature core H1, and the second core portion L6 is inserted into the fitting hole 34g of the second armature core H2. According to this structure, the assembly operation of the linear motor M23 can be simplified.

[0378] Similar to the rotary motor described above (e.g., rotary motor M1), the linear motor M23 also has two magnetic circuits. The first magnetic circuit includes two pole groups G1 separated in the front-rear direction, two pole groups G2 separated in the front-rear direction, excitation cores 22N and 22S opposite to pole groups G1 and G2, and a magnet Mg between the excitation cores 22N and 22S. The second magnetic circuit includes a core connector L, pole groups G1 and G2 facing each other in the left-right direction and magnetically coupled via the core connector L, excitation cores 22N and 22S opposite to pole groups G1 and G2, and a magnet Mg between the excitation cores 22N and 22S.

[0379] (A linear motor having an armature core formed of pressed powder material)

[0380] Armature cores H1 and H2 can be formed from soft magnetic pressed powder material. Figure 24A as well as Figure 24B This is a perspective view showing the linear motor M24 as an example of this type of electrical machinery. Figure 24A as well as Figure 24B In this text, a portion of the excitation section Fs and a portion of the first armature core H1 are omitted. The following explanation focuses on the differences from the linear motor described above. Regarding... Figure 24A as well as Figure 24B For matters not described in the linear motor M24 shown (e.g., the distance (electric angle) between pole pairs P or the structure of the excitation section Fs), the structures of other electromechanical devices described above can be applied.

[0381] like Figure 24B As shown, the armature portion Am24 has a first armature core H1 and a second armature core H2 facing each other in the left-right direction (X1-X2 direction, the direction intersecting with the mechanical action direction). The first armature core H1 has multiple magnetic pole groups G1 arranged in the front-back direction (mechanical action direction). The magnetic pole groups G1 have multiple magnetic poles 33a. The first armature core H1 has a common base 33b protruding from the inner surface of the yoke portion 33c (the surface facing the second armature core H2) toward the excitation portion Fs. The magnetic poles 33a protrude from the common base 33b toward the excitation portion Fs. The multiple magnetic poles 33a are arranged in the front-back direction in the common base 33b.

[0382] like Figure 24B As shown, a plurality of recesses 34b arranged in the front-rear direction are formed on the surface of the second armature core H2 opposite to the excitation section Fs. The portion (protrusion) between two adjacent recesses 34b serves as a magnetic pole 34a. By constructing the portion between two adjacent recesses 34b as a magnetic pole 34a, the strength of the magnetic pole 34a can be increased.

[0383] In the linear motor M24, the first armature core H1 and the second armature core H2 are formed of a soft magnetic powder material. The armature portion Am24 has multiple core connection portions L arranged in the front-to-back direction. For example... Figure 24B As shown, the core connector L and the second armature core H2 are integrally formed. That is, a mold with a space corresponding to the overall shape of the core connector L and the second armature core is prepared, and a soft magnetic powder material is placed in the space within the mold to form the second armature core H2 and the core connector L. Therefore, the second armature core H2 does not have a structure (specifically, a fitting hole) for inserting the core connector L at the position corresponding to the core connector L.

[0384] like Figure 24B As shown, the core connector L extends from the upper part of the yoke 34c toward the upper part of the yoke 33c of the first armature core H1, and connects to the upper part of the yoke 33c of the first armature core H1. A fitting hole 33f is formed at the upper edge of the yoke 33c, and the end of the core connector L is inserted into this fitting hole 33f. In the example of the linear motor M24, the fitting hole 33f is a recessed portion opening upwards. The construction of the fitting hole 33f can be appropriately modified.

[0385] Alternatively, in contrast to the example of the linear motor M24, the core connector L may be integrally formed with the first armature core H1. Furthermore, in other examples, the core connector L may be divided into two core parts, one core integrally formed with the first armature core H1, and the other core integrally formed with the second armature core H2.

[0386] (Axial clearance type)

[0387] Figures 25A-25C An example of an axial clearance type rotary motor M25 is shown, which is an electrical machine in which the first armature core H1 and the second armature core H2 are arranged on opposite sides of each other with the excitation part Fs between them. Figure 25A It is a 3D diagram of the M25 rotary electric motor. Figure 25B This is an exploded 3D view of the M25 rotary motor. Figure 25C This is a bottom view of the rotary motor M25, showing the bottom surface of the first armature core H1. Here, it is compared with... Figure 18A as well as Figure 18B The explanation will focus on the differences of the rotary electric motor M21 described in the previous section. Figures 25A-25C The following matters not described regarding the rotary motor M25 shown can be applied. Figure 18A Examples.

[0388] like Figure 25AAs shown, the first armature core H1 and the second armature core H2 of the rotary electric motor M25 are both disk-shaped and face each other axially. A disk-shaped excitation section Fs is disposed between the two armature cores H1 and H2. Ideally, the excitation cores 22N and 22S of the excitation section Fs are exposed on their upper and lower sides. This reduces the magnetic reluctance of the excitation section Fs and the armature cores H1 and H2.

[0389] like Figure 25B As shown, the first armature core H1 has a yoke portion core 33H and a plurality of pole cores 33J arranged in the rotational direction. The yoke portion core 33H is a stacked steel plate containing a plurality of steel plates stacked in the axial direction. Each pole core 33J is a stacked steel plate containing a plurality of steel plates stacked in the radial direction. Therefore, the steel plates of the yoke portion core 33H are orthogonal to the steel plates of the pole cores 33J. A plurality of fitting holes 33j arranged in the rotational direction are formed in the yoke portion core 33H. The pole cores 33J are respectively inserted into the plurality of fitting holes 33j and magnetically coupled to the yoke portion core 33H. The portion of the pole core 33J protruding from the surface of the yoke portion core 33H toward the excitation part Fs is a pole 33a.

[0390] like Figure 25B As shown, the second armature core H2, like the first armature core H1, has a yoke portion core 34H and multiple pole cores 34J arranged in the rotational direction. The yoke portion core 34H is a stacked steel plate comprising multiple steel plates stacked axially. Each pole core 34J is a stacked steel plate comprising multiple steel plates stacked radially. That is, the steel plates of the yoke portion core 34H are orthogonal to the steel plates of the pole cores 34J. Multiple fitting holes 34j arranged in the rotational direction are formed in the yoke portion core 34H. The pole cores 34J are respectively inserted into the multiple fitting holes 34j and magnetically coupled to the yoke portion core 34H. The portion of the pole core 34J protruding from the surface of the yoke portion core 34H toward the excitation section Fs is a pole 34a.

[0391] In the magnetic pole cores 33J and 34J, steel plates are stacked radially in the rotary electric machine M25. Unlike the example of the rotary electric machine M25, where the steel plates of the magnetic pole core are stacked in the direction of rotation, induced currents are easily generated in the steel plates located at the ends in the direction of rotation. In contrast, in the rotary electric machine M25, since the steel plates of the magnetic pole cores 33J and 34J are stacked radially, the generation of such induced currents can be suppressed.

[0392] like Figure 25B as well as Figure 25CAs shown, in the yoke portions 33H and 34H, slits S7 and S8 are formed that intersect with the closed curves surrounding the fitting holes 33j and 34j in which the magnetic pole cores 33J and 34J are embedded. In the example of the rotary electric machine M25, a slit S7 is formed between the fitting holes 33j in which two adjacent magnetic pole cores 33J are embedded (see reference). Figure 25C Multiple slits S7 are formed throughout the entire circumference of the yoke core 33H. Similarly, slits S8 are formed between the fitting holes 34j in which two adjacent pole cores 34J are respectively embedded (see reference). Figure 25A Multiple slits S8 are formed throughout the entire circumference of the yoke core 34H. These slits S7 and S8 prevent the generation of induced currents in the yoke cores 33H and 34H due to the magnetic flux flowing through the pole cores 33J and 34J. The slits S7 and S8 can also extend from the fitting holes 33j and 34j toward the inner or outer edge of the yoke cores 33H and 34H, reaching that edge.

[0393] like Figure 25A As shown, the armature section Am25 has multiple core connecting portions L arranged at intervals in the rotational direction. The multiple core connecting portions L are disposed in each of multiple pole pairs P (pairs of pole pairs G1 and G2 facing each other across the excitation section Fs). The positions of the core connecting portions L in the rotational direction correspond to the positions of the pole pairs P in the rotational direction. Pole pairs G1 and G2, containing multiple poles 33a and 34a (the portions of pole cores 33J and 34J protruding from the yoke portions 33H and 34H), are located on the excitation section Fs side relative to the yoke portions 33H and 34H. The core connecting portions L are magnetically coupled to the yoke portions 33H and 34H. In the example of the rotary motor M25, fitting holes 33h and 34h are formed in the yoke portions 33H and 34H that penetrate the yoke portions 33H and 34H in the lamination direction of the steel plates (see reference). Figure 25B The core connecting part L is inserted and held in the fitting holes 33h and 34h.

[0394] like Figure 25B As shown, each core connecting portion L may have a first part core L5 and a second part core L6 arranged axially. The first part core L5 is inserted into the fitting hole 33h of the first armature core H1, and the second part core L6 is inserted into the fitting hole 34h of the second armature core H2. According to this structure, the assembly operation of the rotary electric motor M25 can be simplified. When the first armature core H1 and the second armature core H2 are combined, the front end face of the first part core L5 is in contact with the front end face of the second part core L6.

[0395] The core connector L is a stacked steel plate comprising multiple steel plates arranged axially and stacked in the rotational direction (mechanical action direction). This arrangement and stacking of the steel plates can suppress the generation of induced current in the steel plates of the core connector L.

[0396] The core connection portion L is located radially outward relative to the magnetic pole groups G1 and G2 (coil CL). This easily ensures sufficient width of the core connection portion L in the rotational direction. Alternatively, the core connection portion L may be located radially inward relative to the magnetic pole groups G1 and G2 (coil CL).

[0397] Each core connection L can also be divided into multiple parts in the direction of rotation (mechanical action direction). In the rotary electric machine M25, each core connection L has partial cores arranged in the direction of rotation. More specifically, as... Figure 25C As shown, the first part core L5, magnetically coupled to the first armature core H1, has parts cores L5a and L5b arranged in the rotational direction. This allows part core L5a to be tilted relative to part core L5b, thereby aligning the orientation of parts cores L5a and L5b with the arrangement of the magnetic poles 33a (magnetic pole core 33J). Furthermore, the two parts cores L5a and L5b can be inserted into a single fitting hole 33h. At this time, a gap is formed between the two parts cores L5a and L5b. Similarly, the second part core L6, magnetically coupled to the second armature core H2, has parts cores L6a and L6b arranged in the rotational direction (see reference). Figure 25B Therefore, the orientation of some cores L6a and L6b can be adapted to the arrangement of magnetic pole 34a (magnetic pole core 34J).

[0398] The rotary electric machine M25, like the rotary electric machine described above (e.g., rotary electric machine M1), has two magnetic circuits. The first magnetic circuit includes two pole groups G1 separated in the rotational direction, two pole groups G2 separated in the rotational direction, excitation cores 22N and 22S opposite to pole groups G1 and G2, and a magnet Mg between the excitation cores 22N and 22S. The second magnetic circuit includes a core connector L, pole groups G1 and G2 facing each other axially and magnetically coupled via the core connector L, excitation cores 22N and 22S opposite to pole groups G1 and G2, and a magnet Mg between the excitation cores 22N and 22S.

[0399] like Figure 25C As shown, the yoke core 33H has a slit S3 extending from the fitting hole 33h of the core connecting portion L in a direction intersecting the stacking direction of the steel plate relative to the yoke core 33H. The slit S3 intersects the closed curve surrounding each fitting hole 33h. This prevents the formation of induced current around each core connecting portion L. The slit S3 extends radially inward to reach an opening located opposite the excitation portion Fs. In the first armature core H1, the slit S7 (the opening towards the excitation portion Fs) is located opposite the excitation portion Fs, and the slit S3 reaches the slit S7. The slit S3 may also reach the fitting hole 33j of the pole core 33J, instead of the slit S7.

[0400] In addition, such as Figure 25A As shown, the yoke core 34H has a fitting hole 34h from the core connecting part L (refer to...). Figure 25B A slit S4 extends in a direction intersecting the stacking direction of the steel plates relative to the yoke core 34H. The slit S4 intersects the closed curve surrounding each fitting hole 34h. This prevents the formation of induced current around each core connection portion L. The slit S4 extends radially inward toward the fitting hole 34h, reaching an opening located opposite the excitation portion Fs. A fitting hole 34j for inserting the pole core 34J is formed opposite the excitation portion Fs and opens toward the excitation portion Fs. The slit S4 reaches this fitting hole 34j (the opening located opposite the excitation portion Fs). The slit S4 can also reach a slit S8 formed between two adjacent fitting holes 34j.

[0401] like Figure 25C As shown, the slit S3 of the first armature core H1 intersects with the closed curve that passes through multiple fitting holes 33h and between multiple magnetic pole groups G1 and surrounds the axis Ax. This slit S3 prevents a closed circuit surrounding the entire first armature core H1 from forming between the multiple core connection portions L and the multiple magnetic pole groups G1. Therefore, it is possible to prevent the magnetic flux Φ7 (refer to...) formed in the magnetic circuit including the core connection portions L. Figure 3B This induces a rotational current in the first armature core H1. Similarly, the slit S4 of the second armature core H2 intersects with the closed curve that passes through multiple fitting holes 34h and between multiple magnetic pole groups G2 and surrounds the axis Ax. Therefore, it is possible to prevent the current from being induced by the magnetic flux Φ7 (refer to...). Figure 3B The second armature core H2 generates an induced current in the direction of rotation.

[0402] Alternatively, the fitting holes into which the core connecting portions L are embedded can also be opened on the outer peripheral surface of the yoke cores 33H and 34H. In this case, the aforementioned slits S3 and S4 may not be formed in each core connecting portion L. Preferably, instead of slits S3 and S4, slits are formed at any position on the yoke cores 33H and 34H, intersecting the closed curves that pass through the multiple fitting holes into which the multiple core connecting portions L are embedded and between the multiple magnetic pole groups G1 and G2 and surround the axis Ax. This slit can, for example, be connected to... Figure 9A or Figure 9B Similarly, the slits S5 and S6 shown extend from any of the fitting holes and connect to the fitting holes 33j and 34j in which the magnetic pole cores 33J and 34J are embedded, or they can connect to the slits S7 and S8 between two adjacent fitting holes 33j and 34j.

[0403] (Example of armature cores configured in two different directions)

[0404] The relative positions of the armature cores H1 and H2 and the excitation section Fs are not limited to the examples of electrical machinery described above. For example, in a rotary motor, one armature core may be arranged radially relative to the outer or inner circumferential surface of the excitation section, and another armature core may be arranged axially relative to the excitation section Fs. In a linear motor, one armature core may be arranged laterally relative to the right or left side (the first side along the direction of mechanical action) of the excitation section Fs, and another armature core may be arranged above or below the upper or lower surface (the second side along the direction of mechanical action) of the excitation section Fs.

[0405] Figure 26A as well as Figure 26B This diagram shows the rotary electric motor M26 as an example of this type of electrical machinery. Figure 26A It's a 3D image. Figure 26B It is an exploded 3D diagram. Figure 26A In this text, the armature cores H1 and H2, the excitation section Fs, and a portion of the coil CL are omitted. Here, it is used in conjunction with... Figure 1A The explanation will focus on the differences in the rotary motor M1 described in the previous section. Figure 26A as well as Figure 26B The following matters not described in the illustration of the rotary motor M26 may be applied. Figure 1A Examples.

[0406] like Figure 26B As shown, the armature section Am26 has one first armature core H1 and two second armature cores H2. The first armature core H1 is arranged radially outward relative to the outer peripheral surface of the excitation section Fs. Alternatively, unlike the rotary electric machine M26, the first armature core H1 may be arranged inside the excitation section Fs. The two second armature cores H2 are arranged axially across the excitation section Fs on opposite sides. That is, one second armature core H2 is located above the upper surface (the axial surface) of the excitation section Fs, and the other second armature core H2 is located below the lower surface (the axial surface) of the excitation section Fs. The two armature cores H2 may have the same structure. In this way, the manufacturing cost of the rotary electric machine M26 can be reduced. Ideally, the excitation cores 22N and 22S are exposed on the outer peripheral surface of the excitation section Fs and on the upper and lower surfaces of the excitation section Fs.

[0407] The first armature core H1 is, for example, composed of multiple steel plates stacked axially. The first armature core H1 may be formed of a soft magnetic powder material. Furthermore, in the example shown in the figure, the second armature core H2 is formed of a soft magnetic powder material. The second armature core H2 may be a stack of steel plates.

[0408] When using the rotary motor M26, for example, the excitation unit Fs is fixed to the device that mounts the rotary motor M26, and the armature unit Am26 rotates around the axis Ax. Conversely, the armature unit Am26 can also be fixed to the device that mounts the rotary motor M26, and the excitation unit Fs rotates around the axis Ax.

[0409] like Figure 26B As shown, the first armature core H1 has multiple pole groups G1 arranged in the rotational direction. The first armature core H1 includes, for example, a U-phase coil CL1, a V-phase coil CL1v, and a W-phase coil CL1w. The rotary motor M26 is, for example, an electrical machine driven by three-phase AC. Each second armature core H2 has multiple pole groups G2 arranged in the rotational direction on the side facing the excitation section Fs. In the rotary motor M26, the number of poles in the excitation section Fs is, for example, 56 (p = 28).

[0410] The electrical angle between adjacent magnetic pole pairs P is as shown in the reference. Figure 2 As explained, it is generally expressed as 360 × (n + m / s), for example, 1,680 degrees (in the rotary electric machine M26, s = 3, and m = 2, n = 4). The mechanical angle between adjacent pole pairs P is expressed as "(360 / p) × (n + m / s)", which is essentially the same as "360 / s / c". This mechanical angle is, for example, 60 degrees in the rotary electric machine M26 (in the rotary electric machine M26, c = 2).

[0411] like Figure 26B As shown, the armature portion Am26 has multiple core connecting portions L arranged at intervals in the rotational direction. The magnetic pole group G1 of the first armature core H1 is formed on the excitation portion Fs side relative to the yoke portion 33c. The magnetic pole group G2 of the second armature core H2 is formed on the excitation portion Fs side relative to the yoke portion 34c. The core connecting portions L magnetically couple the yoke portion 33c and the yoke portion 34c. The multiple core connecting portions L are respectively provided on multiple pairs of magnetic pole groups P (pairs of magnetic pole groups G1 and G2 located at corresponding positions in the rotational direction).

[0412] In the armature portion Am26, the core connecting portion L and the second armature core H2 are integrally formed. That is, a mold with a space corresponding to the overall shape of the core connecting portion L and the second armature core H2 is prepared, and a soft magnetic powder material is placed in the space within the mold to form the second armature core H2 and the core connecting portion L.

[0413] like Figure 26BAs shown, a core connector L is formed in each of the two second armature cores H2. The core connector L has an extension L7 extending radially from the yoke portion 34c of the second armature core H2. The extension L7 extends radially beyond the position of the coil CL. The core connector L has a fitting portion L8 extending axially from the end of the extension L7. The yoke portion 33c of the first armature core H1 has a fitting hole 33h that extends axially through it. The fitting portion L8 is inserted into the fitting hole 33h, and the yoke portion 33c and the yoke portion 34c are magnetically coupled via the core connector L. The fitting portion L8 of the core connector L of the upper armature core H2 and the fitting portion L8 of the core connector L of the lower armature core H2 are inserted into the common fitting hole 33h.

[0414] In the first armature core H1, a slit S3 is formed extending from the fitting hole 33h in a direction intersecting the stacking direction of the steel plates relative to the first armature core H1. Specifically, the slit S3 extends toward the excitation section Fs. As a result, it is possible to prevent the generation of induced current around each core connection section L due to the magnetic flux formed in the core connection section L.

[0415] The shape of the core connection portion L is not limited to the example of the armature portion Am26. For example, when the yoke portion 34c has a larger radial width than the portion located axially relative to the magnetic pole group G1 and the coil CL, the core connection portion L may not have a radially extending extension portion L7.

[0416] Furthermore, the second armature core may comprise a stack of steel plates including multiple steel plates stacked axially. In this case, the yoke portion 34c may have a portion axially positioned relative to the pole group G1 and the coil CL, and a hole is formed in this portion of the yoke portion 34c that extends axially through it. Moreover, the core connecting portion L can be inserted into this hole of the yoke portion 34c and the fitting hole 33h of the first armature core H1.

[0417] The rotary electric motor M26, like the rotary electric motor described above (e.g., rotary electric motor M1), has two magnetic circuits. The first magnetic circuit includes two pole groups G1 and G2 separated in the rotational direction, excitation cores 22N and 22S opposite to pole groups G1 and G2, and a magnet Mg between the excitation cores 22N and 22S. The second magnetic circuit includes a core connector L, pole groups G1 and G2 whose angular positions in the rotational direction correspond and are magnetically coupled via the core connector L, excitation cores 22N and 22S opposite to pole groups G1 and G2, and a magnet Mg between the excitation cores 22N and 22S. Magnetic flux through both magnetic circuits passes through the inner side of the coil CL located in pole group G1.

[0418] Furthermore, the configuration of armature cores H1 and H2 is not limited to the electromechanical configuration described above. For example, when the direction of the first armature core H1 relative to the excitation section Fs is referred to as the first direction, and the direction of the second armature core H2 relative to the excitation section Fs is referred to as the second direction, the angle between the first direction and the second direction may not be 90 degrees or 180 degrees, but may be, for example, 120 degrees. In this case, the cross-section of the excitation section Fs may be triangular.

[0419] Furthermore, the cross-section of the excitation section Fs can also be circular. In this case, the end faces of the magnetic poles 33a and 34a of the armature cores H1 and H2 can be bent along with the outer peripheral surface of the excitation section Fs.

[0420] (Other examples of core-connected structures)

[0421] In the electrical machinery described above, the core-connecting structure that magnetically couples the first armature core H1 and the second armature core H2 utilizes multiple core-connecting portions L arranged at intervals in the mechanical action direction. However, the core-connecting structure is not limited to this; a single core-connecting portion L extending in the mechanical action direction may also be used. Figure 27A as well as Figure 27B An example of this type of electrical machinery is shown: the axial clearance type rotary motor M27. Figure 27A It's a 3D image. Figure 27B This is an exploded 3D diagram. Here, it is used in conjunction with... Figures 25A-25C The rotary motor M25 described in the text, and Figure 27A and Figure 27B The differences of the rotary motor M27 shown will be explained in detail. For matters not covered in the explanation of the rotary motor M27, please refer to... Figures 25A-25C Examples.

[0422] like Figure 27B As shown, the first armature core H1 has multiple pole groups G1 arranged in the rotational direction. Each pole group G1 has a pole 33a protruding axially toward the second armature core H2. The first armature core H1 has a disk-shaped yoke portion 33c. The poles 33a are formed on the upper surface of the yoke portion 33c (the surface facing the second armature core H2). The radial width of the yoke portion 33c is uniform throughout the entire circumference of the armature core H1. The first armature core H1 is formed, for example, from a soft magnetic powder material.

[0423] like Figure 27A As shown, the coil CL provided in each magnetic pole group G1 may have a first coil CL1 wound around all the magnetic poles 33a constituting the magnetic pole group G1, and a second coil CL2 wound around only a portion of the magnetic poles 33a. In this way, the gap between the magnetic poles 33a can be effectively utilized. In addition, the two coils CL1 and CL2 are wound in the same direction and connected in series.

[0424] like Figure 27BAs shown, a plurality of recesses 34b arranged in the rotational direction are formed on the surface of the second armature core H2 opposite to the excitation section Fs. The portion (protrusion) between two adjacent recesses 34b is a magnetic pole 34a. The second armature core H2 has a disk-shaped yoke 34c. Recesses 34b and magnetic poles 34a are formed on the lower surface of the yoke 34c (the surface facing the first armature core H1). The radial width of the yoke 34c is uniform throughout the entire circumference of the armature core H2. In the second armature core H2, each magnetic pole group G2 is composed of a plurality of magnetic poles 34a (e.g., 7 magnetic poles 34a). The second armature core H2 is formed, for example, from a soft magnetic powder material.

[0425] In the rotary electric machine M27, the number of poles in the excitation section Fs is, for example, 76 (p = 38). The electrical angle between adjacent pole pairs P is as shown in the reference... Figure 2 As explained, it is generally expressed as 360 × (n + m / s), which is, for example, 2,280 degrees in the rotary electric machine M25 (where s = 3, m = 1, and n = 6). Furthermore, the mechanical angle between adjacent pole pairs P is expressed as "(360 / p) × (n + m / s)," which is essentially the same as "360 / s / c." In the rotary electric machine M25, this mechanical angle is, for example, 60 degrees (where c = 2).

[0426] like Figure 27A As shown, the first armature core H1 has a core connecting portion L11 extending from the outer periphery of the yoke portion 33c toward the second armature core H2. The core connecting portion L11 is annular, forming throughout the entire circumference of the first armature core H1. Similarly, the second armature core H2 has a core connecting portion L12 extending from the outer periphery of the yoke portion 34c toward the first armature core H1. The core connecting portion L12 is annular, forming throughout the entire circumference of the second armature core H2.

[0427] The axial end face of the core connecting part L11 of the first armature core H1 ( Figure 27A The upper surface of the core connecting part L11 in the middle and the axial end face of the core connecting part L12 of the second armature core H2 ( Figure 27A The lower surfaces of the core connecting parts L11 and L12 can be connected to each other. In this way, the magnetic resistance of the magnetic circuit formed through the core connecting parts L11 and L12 can be reduced.

[0428] Furthermore, in the armature section Am27, the core interconnect structure is not limited to... Figure 27A as well as Figure 27BThe example shown. For instance, a ring-shaped core connection portion may be formed only on one of the armature cores H1 and H2. In this case, the axial end face of the core connection portion may be in contact with the outer periphery of the yoke portion of the other armature core. As another example, the core connection portions L11 and L12 may also be formed on the inner periphery of the yoke portions 33c and 34c, rather than on the outer periphery of the yoke portions 33c and 34c. Furthermore, the core connection portions L11 and L12 may not cover the entire circumference. For example, a portion may be cut off to serve as a pull-out for the wire connecting the external drive circuit supplying power to the rotating electric motor M27 to the coil CL.

[0429] In a rotary motor M27 with a core-connecting structure extending in the mechanical direction (rotation direction in the rotary motor M27) ​​and consisting of a core-connecting portion L11, L12, similar to the rotary motor described above (e.g., rotary motor M1), two magnetic circuits with two types of magnetic flux are formed. Specifically, the first magnetic circuit includes two magnetic pole groups G1 and G2 separated in the rotational direction, excitation cores 22N and 22S opposite to magnetic pole groups G1 and G2, and a magnet Mg between the excitation cores 22N and 22S. The second magnetic circuit includes core-connecting portions L11, L12, magnetic pole groups G1 and G2 whose angular positions correspond to each other in the rotational direction and are magnetically coupled via core-connecting portions L11, L12, excitation cores 22N and 22S opposite to magnetic pole groups G1 and G2, and a magnet Mg between the excitation cores 22N and 22S.

[0430] Furthermore, as described above, the armature cores H1 and H2 are formed from a soft magnetic powder material. Because these armature cores H1 and H2 have high resistivity, induced current can be suppressed regardless of the direction of the magnetic flux through them. Therefore, unlike the electromechanical systems described above, slits to prevent the generation of induced current can be omitted from the armature cores H1 and H2.

[0431] (Application and combination of variations)

[0432] Additionally, refer to Figure 27A as well as Figure 27B The core connecting parts L11 and L12, which are described below, can be applied not only to rotary motors with axial backlash, but also to, for example... Figure 24A The linear motor shown, or Figure 26A The rotary motor shown is a radial clearance type rotary motor. When the core connecting parts L11 and L12 are applied to the linear motor M24, the front-to-back length of the core connecting parts L11 and L12 can correspond to the overall length of the multiple magnetic pole groups G1 and G2 of the armature cores H1 and H2.

[0433] In any of the electrical machines described above, there is a connection with... Figure 27ASimilarly, multiple coils CL can be provided in each magnetic pole group G1. That is, in any electrical machinery, the armature can have a first coil surrounding the multiple magnetic poles 33a constituting each magnetic pole group G1, and a second coil disposed inside the first coil and surrounding only a portion of the magnetic poles 33a. In this case, the center of the first coil in the mechanical direction of operation should be aligned with the center of the second coil in the mechanical direction of operation.

[0434] by Figures 1A to 3B In the armature section described, the number of phases of coil CL is odd (e.g., three-phase), and the winding direction of the coils in each phase is the same. This coil configuration can be applied to radially gapped rotary motors, axially gapped rotary motors, linear motors, and reference models. Figure 26A Any of the rotating electric machines described herein.

[0435] Figure 14A as well as Figure 14B The coil configuration shown can also be applied to radial backlash rotary motors, axial backlash rotary motors, linear motors, and reference motors. Figure 26A Any of the rotating electric machines described herein. That is, in Figure 14A as well as Figure 14B In other electrical machinery, the number of phases of coil CL is also odd (e.g., three-phase), and two coils with opposite winding directions can be provided for each phase (e.g., U+ phase coil CLu+, U- phase coil CLu-).

[0436] also, Figure 15A as well as Figure 15B The coil configuration shown can also be applied to radial backlash rotary motors, axial backlash rotary motors, linear motors, and reference motors. Figure 26A Any of the rotating electric machines described herein. That is, in Figure 15A as well as Figure 15B In other electrical machinery, the number of phases of coil CL is also even (e.g., two-phase), and two coils with opposite winding directions can be provided for each phase (e.g., A+ phase coil CLa+, A- phase coil CLa-).

[0437] Furthermore, in any of the electrical machines described above, magnetic poles 33a and 34a can be as follows: Figure 13A as well as Figure 22As shown, the armature core has a protrusion 33n that intersects the main body of the magnetic pole with the direction of mechanical action and extends along the surface of the excitation section Fs. When the armature core having the magnetic pole with the protrusion 33n is a laminated steel plate, the front end of the steel plate located at the end in the lamination direction can be bent. When the armature core is a soft magnetic powder material, the protrusion 33n can be integrally formed with the main body of the magnetic pole. As another example, the armature core may also have a portion that is a laminated steel plate and a portion located at the end in the lamination direction that is formed of a soft magnetic powder material. In this case, the protrusion 33n can be integrally formed with the portion formed of the soft magnetic powder material.

[0438] Furthermore, in electrical machinery where the core connecting portion L is a stacked steel plate embedded in fitting holes 33h and 34h with closed inner surfaces, the steel plates of the core connecting portion L can be stacked in the mechanical action direction. This allows for the suppression of induced currents in the steel plate caused by the magnetic flux Φ7 passing through the core connecting portion L.

[0439] Furthermore, the armature portion having an armature core formed of laminated steel plates can be reinforced with a non-magnetic and insulating material. For example, the armature portion can be molded with resin. In this case, the front end faces of the magnetic poles 33a and 34a can be exposed from the resin.

[0440] Furthermore, in the example described above, only the first armature core H1 has a coil CL. However, it is also possible to have coil CL in both the first armature core H1 and the second armature core H2.

[0441] In addition, refer to Figure 13A as well as Figure 13B The armature section, in which multiple component cores 33A and 33D are combined to form the armature core, is described. This structure can be applied not only to radially backlash type rotary motors but also to other electrical machinery such as linear motors. Furthermore, the armature core, such as... Figure 13A as well as Figure 13B As illustrated, it may have partial cores 33A and 33D that are combined in the radial direction, or partial cores that are combined in the direction of mechanical action.

[0442] A linear motor may have two excitation sections separated in the left-right direction (the direction of opposition of multiple armature cores). In this case, the armature section may have three armature cores. Furthermore, one armature core may be positioned between the two excitation sections, and the other two armature cores may be positioned to the left and right of the two excitation sections, respectively. The armature core positioned between the two excitation sections may have magnetic pole groups on its right and left sides. In this case, the armature core positioned between the two excitation sections may have a yoke that allows magnetic flux flow in the forward-backward direction (the direction of mechanical action), or it may only allow magnetic flux flow in the left-right direction (the direction of opposition of the armature cores).

[0443] (Summary of Implementation Methods)

[0444] like Figure 1A as well as Figure 18A As illustrated, rotary electric machines M1 and M21 have armature portions Am1 and Am21, and excitation portions Fs capable of relative movement with respect to the armature portions Am1 and Am21. The excitation portion Fs includes multiple excitation cores 22N and 22S arranged in the direction of relative movement between the armature portions Am1 and Am21 and the excitation portion Fs, i.e., the rotation direction (mechanical action direction), and multiple magnets Mg disposed between adjacent excitation cores 22N and 22S. The armature portions Am1 and Am21 include a first armature core H1 and a second armature core H2 separated in a direction intersecting with the rotation direction (axial in armature portion Am1 and radial in armature portion Am21), a core-connecting structure magnetically coupling the first armature core H1 and the second armature core H2, and multiple coils CL. The first armature core H1 has magnetically coupled pole groups G1u and G1v arranged in the rotation direction. The second armature core H2 has magnetically coupled pole groups G2u and G2v arranged in the rotational direction. The position of pole group G1u in the rotational direction corresponds to the position of pole group G2u in the rotational direction. The position of pole group G1v in the rotational direction corresponds to the position of pole group G2v in the rotational direction. Multiple coils CL include a U-phase coil CLu disposed in pole group G1u. For example... Figure 3B as well as Figure 18C As shown, the first magnetic flux Φ1 through the U-phase coil CLu and the second magnetic flux Φ7 through the U-phase coil CLu are formed by one or more of a plurality of magnets Mg. The first magnetic circuit for the first magnetic flux Φ1 includes magnetic pole groups G1u, G1v, G2u, G2v, excitation cores 22N and 22S, and magnets Mg. The second magnetic circuit for the second magnetic flux Φ7 includes magnetic pole group G1u, core-connecting structure, magnetic pole group G2u, excitation cores 22N and 22S, and magnets Mg. According to this rotary motor M1 and M21, magnetic saturation of the magnetic circuit can be suppressed. As a result, the current supplied to the coil CL can be increased, thereby obtaining greater power from the rotary motor M1 and M21. In addition, since it is not necessary to magnetically divide the armature cores H1 and H2 in the rotation direction, the strength of the armature cores H1 and H2 can be increased. Other electrical machines proposed in this invention also have the above-described first and second magnetic circuits and achieve the same effect.

[0445] (1) Figure 1AIn the illustrated rotary electric motor M1, the excitation section Fs has an inner circumferential surface along the rotation direction. The first armature core H1 and the second armature core H2 are located radially inside the inner circumferential surface of the excitation section Fs. The core connection structure includes a plurality of core connection portions L arranged in the rotation direction. Each core connection portion L includes a core connection portion L that is radially inside the pole group G1u, the pole group G2u, and the U-phase coil disposed in the pole group G1u. Figures 10-17 The illustrated rotary or linear motor also has armature cores H1 and H2 located in the same direction relative to the excitation section Fs.

[0446] (2) Figure 18A In the illustrated rotary electric motor M21, the excitation section Fs has an inner peripheral surface and an outer peripheral surface as surfaces along the rotation direction. The first armature core H1 is located radially outside the outer peripheral surface of the excitation section Fs, and the second armature core H2 is located radially inside the inner peripheral surface of the excitation section Fs. Figures 21A to 27B The illustrated rotary or linear motor, like the rotary motor M21, has armature cores H1 and H2 located in different directions relative to the excitation section Fs. This configuration increases the degree of freedom in the arrangement of the armature cores H1 and H2.

[0447] (3) Figure 1A In the illustrated rotary motor M1, for each of the plurality of fitting holes 33h and 34h into which the plurality of core connecting parts L are respectively inserted, slits S3 and S4 extending from the fitting holes 33h and 34h in a direction intersecting the stacking direction relative to the steel plate Sp1 are formed. Furthermore, in Figure 7 In the illustrated armature section Am2, the fitting holes 33g and 34g of the armature cores H1 and H2 open in a direction that intersects the stacking direction relative to the steel plate Sp1 (radially inward). This allows for the suppression of induced currents around the core connection portions L.

[0448] (4) Figure 1A In the illustrated rotary electric motor M1, slits S3 and S4 extending from each fitting hole 33h and 34h intersect with a closed curve enclosing the axis Ax between multiple fitting holes 33h and 34h arranged in the rotational direction (mechanical action direction) and multiple magnetic pole groups G1 and G2 arranged in the rotational direction (mechanical action direction). Furthermore, Figure 7 In the illustrated armature section Am2, slits S5 and S6 intersect with a closed curve passing through multiple fitting holes 33g and 34g between the magnetic pole groups G1 and G2 arranged in the rotational direction (mechanical action direction) and surrounding the axis Ax. Based on these slits S3, S4, S5, and S6, it is possible to suppress the induced current C2 in the armature cores H1 and H2 in the rotational direction (see reference). Figure 8 ).

[0449] (5) In Figure 18A In the example, armature cores H1 and H2, for each of the plurality of mating holes 33h and 34h, have slits S3 and S4 extending from the mating holes 33h and 34h in a direction intersecting with the stacking direction of the steel plates. Figure 19 In the example, the fitting holes 33g and 34g formed in the armature cores H1 and H2 open in directions that intersect with the stacking direction of the steel plates. Accordingly, it is possible to suppress the generation of induced current around the core connection portion L.

[0450] (6) In Figure 18A In the example, the slits S3 and S4 extending from each fitting hole 33h and 34h intersect the closed curve that passes between the multiple fitting holes 33h and 34h arranged in the rotational direction (mechanical action direction) and the multiple magnetic pole groups G1 and G2 arranged in the rotational direction (mechanical action direction) and surrounds the axis Ax. Figure 19 In the example, slits S5 and S6 intersect with the closed curves that pass through multiple fitting holes 33g and 34g and are between the magnetic pole groups G1 and G2 arranged in the rotation direction (mechanical action direction) and surround the axis Ax. According to these slits S3, S4, S5 and S6, it is possible to suppress the induced current in the armature cores H1 and H2 in the rotation direction.

[0451] (7) Figure 24A as well as Figure 27A As illustrated, the core connection portion L and one or both of the first armature core H1 and the second armature core H2 are integrally formed. Accordingly, the assembly of the armature portion can be simplified.

[0452] (8) Figure 18A As illustrated, the first armature core H1 has a yoke portion 33c, and magnetic pole groups G1u and G1v are formed on the excitation portion Fs side of the yoke portion 33c. The second armature core H2 has a yoke portion 34c, and magnetic pole groups G2v and G2v are formed on the excitation portion Fs side of the yoke portion 34c. A plurality of core connecting portions L include core connecting portions L that magnetically couple the yoke portions 33c and 34c and are positioned at positions corresponding to the positions of magnetic pole groups G1u and G2u in the rotational direction.

[0453] (9) The magnetic pole groups G1 and G2 have multiple magnetic poles 33a and 34a arranged in the direction of mechanical action. Accordingly, the power output of the electromechanical equipment can be increased.

[0454] (10) The magnetic poles 33a and 34a have a shape that protrudes toward the excitation part Fs.

[0455] (11) such as Figure 13A as well as Figure 22As illustrated, the magnetic pole 33a has a protrusion 33n extending from the main body of the magnetic pole 33a in a direction intersecting with the direction of mechanical action. Accordingly, the magnetic reluctance caused by the gap between the excitation part Fs and the magnetic pole 33a can be reduced.

[0456] (12) can be as follows Figure 1A As illustrated, the rotary electric motor M1 has an odd number of phases, three or more, and the armature section includes two or more coils CL with the same winding direction for each phase. In this configuration, the pole pair Pu and the pole pair Pv are substantially separated by "360×(n+m / s)" degrees in electrical degrees. Here, s, m, and n represent the following numbers respectively.

[0457] s: Phase number

[0458] m: an integer greater than 1 and less than s-1 (where the divisors of s (excluding 1) and the divisors of s (excluding 1) are all integers.

[0459] (excluding multiples of 1)

[0460] n: an integer greater than or equal to 1

[0461] (13) In the rotary motor M1 of (12), when (number of poles of the excitation section) / 2 is set as p and the number of coils for each phase is set as c, “(360 / p)×(n+m / s)” and “360 / s / c” are essentially equal.

[0462] (14) can be as follows Figure 14A As illustrated, the rotating electric machine has an odd number of phases, 3 or more, and the armature section Am7 includes a coil pair (e.g., CLu+, CLu-) for each phase, consisting of two coils with different winding directions. For example, the winding direction of the coil in the first pole pair Pu+ is the same as the winding direction of the coil in the second pole pair Pv+, and the coil in the first pole pair Pu+ and the coil in the third pole pair Pu- form a coil pair. In this configuration, (i) the first pole pair Pu+ and the second pole pair Pv+ are substantially separated by "360×(n+m / s)" degrees in electrical angles. Furthermore, (ii) the first pole pair Pu+ and the third pole pair Pu- are substantially separated by "360×(q+1 / 2)" degrees in electrical angles. Here, s, m, n, and q represent the following numbers, respectively.

[0463] s: Phase number

[0464] m: an integer greater than 1 and less than s-1 (excluding divisors of s (excluding 1) and multiples of divisors of s (excluding 1)).

[0465] n: an integer greater than or equal to 1

[0466] q: an integer greater than or equal to 1

[0467] (15) In the rotating motor of (14), when (number of poles of the excitation section) / 2 is set as p and the number of coil pairs for each phase is set as c, “(360 / p)×(n+m / s)” and “360 / s / c” are essentially equal.

[0468] (16) can be as follows Figure 15A As illustrated, the rotating electric motor has an even number of phases, two or more, and the armature section Am8 includes coil pairs (e.g., CLa+, CLa-) for each phase, consisting of two coils with different winding directions. Figure 15B As shown, the winding direction of the coil of the first magnetic pole pair Pa+ is the same as the winding direction of the coil of the second magnetic pole pair Pv+, and the coil of the first magnetic pole pair Pa+ and the coil of the third magnetic pole pair Pa- form a coil pair. In this configuration, (i) the first magnetic pole pair and the second magnetic pole pair are substantially separated by "360×(n+m / s / 2)" degrees in electrical angle, and (ii) the first magnetic pole pair and the third magnetic pole pair are substantially separated by "360×(q+1 / 2)" degrees in relative electrical angle. Here, s, m, n, and q represent the following numbers respectively.

[0469] s: Phase number

[0470] n: an integer greater than or equal to 1

[0471] m: an integer greater than 1 and less than s-1 (excluding divisors of s (excluding 1) and multiples of divisors of s (excluding 1)).

[0472] q: an integer greater than or equal to 1

[0473] (17) In the rotating motor of (16), when (number of poles of the excitation section) / 2 is set as p and the number of coil pairs for each phase is set as c, “(360 / p)×(n+m / s / 2)” and “180 / s / c” are essentially equal.

[0474] (18) can be as follows Figure 16 as well as Figure 20 As illustrated, each excitation core 22N, 22S includes two partial excitation cores 22f disposed between two adjacent magnets Mg and separated in the direction of mechanical action. Accordingly, the accumulation of dimensional errors between the excitation cores 22N, 22S and the magnets Mg can be suppressed, thereby improving the positional accuracy of the excitation cores 22N, 22S and the magnets Mg.

[0475] Symbol explanation:

[0476] 22N, 22S: Excitation core

[0477] 22f: Partial excitation core

[0478] 23: Fixing part

[0479] 33A: Core of the Magnetic Pole Assembly

[0480] 33A1: First Core

[0481] 33A2: Second Part Core

[0482] 33D: Core of the yoke section

[0483] 33E: End plate

[0484] 33F: Main steel plate

[0485] 33G, 33H: Core of the yoke section

[0486] 33J: Magnetic pole core

[0487] 33a: Magnetic pole

[0488] 33b: Common base

[0489] 33c: Magnetic yoke

[0490] 33d: concave part

[0491] 33e: Slit surface

[0492] 33f, 33g, 33h: Fitting holes

[0493] 33i: Connecting Surface

[0494] 33j: Fitting hole

[0495] 33m: gap

[0496] 33n: Protrusion

[0497] 33u: Side view

[0498] 34E: End plate

[0499] 34F: Main steel plate

[0500] 34G, 34H: Core of the yoke section

[0501] 34J: Magnetic pole core

[0502] 34a: Magnetic pole

[0503] 34b: concave part

[0504] 34c: Magnetic yoke

[0505] 34g, 33h: Fitting holes

[0506] 34j: Fitting hole

[0507] 34n: Protrusion

[0508] 55a: Card-connecting part

[0509] 55b: The part that was stuck

[0510] Am1~Am8, Am10, Am21~Am27: Armature section

[0511] CL: Coil

[0512] Fs: Excitation section

[0513] G1, G2: Magnetic pole groups

[0514] H1: First armature core

[0515] H2: Second armature core

[0516] L, L11, L12: Core connecting part

[0517] L1, L2: Fitting parts

[0518] L3: Extension

[0519] L5: First Core

[0520] L5a, L5b: Some cores

[0521] L6: Second Core

[0522] L6a, L6b: Some cores

[0523] L7: Extension

[0524] L8: Fitting part

[0525] Le: End of the core connection part

[0526] Li: Connecting mechanism

[0527] M1~M5、M8: Rotary electric motor

[0528] M10: Linear motor

[0529] M21: Rotary Electric Machine

[0530] M22~M24: Linear motors

[0531] M25~M27: Rotary electric motor

[0532] Mg: Magnet

[0533] P: Magnetic pole pair

[0534] Sp1, Sp2: Electromagnetic steel plates

[0535] Φ1, Φ2, Φ7: Magnetic flux

Claims

1. An electrical machine, comprising: Armature section; and An excitation unit capable of relative movement relative to the armature portion; The excitation unit includes: a plurality of excitation cores arranged in the relative movement direction (i.e., the mechanical action direction) between the armature unit and the excitation unit, and a plurality of magnets respectively disposed between two adjacent excitation cores. The armature portion includes: a first armature core and a second armature core separated in a direction intersecting with the direction of mechanical action; a core-connecting structure magnetically coupling the first armature core and the second armature core; and a plurality of coils. The first armature core has a first magnetic pole group and a second magnetic pole group arranged and magnetically coupled in the direction of mechanical action. The second armature core has a third and a fourth magnetic pole group arranged and magnetically coupled in the direction of said mechanical action. The position of the first magnetic pole group in the direction of mechanical action corresponds to the position of the third magnetic pole group in the direction of mechanical action. The position of the second magnetic pole group in the direction of mechanical action corresponds to the position of the fourth magnetic pole group in the direction of mechanical action. The plurality of coils includes a first coil disposed in one of the first magnetic pole group and the third magnetic pole group. A first magnetic flux through the first coil and a second magnetic flux through the first coil are formed by one or more of the plurality of magnets. The first magnetic circuit for the flow of the first magnetic flux includes the first magnetic pole group, the second magnetic pole group, the third magnetic pole group, the fourth magnetic pole group, the excitation core, and the magnet. The second magnetic circuit for the flow of the second magnetic flux includes the first magnetic pole group, the core-connection structure, the third magnetic pole group, the excitation core, and the magnet. The excitation unit has a first surface along the direction of the mechanical action. The first armature core and the second armature core are located in a first direction that intersects the mechanical action direction relative to the first surface of the excitation part. The core connection structure includes a plurality of core connection portions arranged in the direction of mechanical action. The plurality of core connectors include core connectors located in the first direction relative to the first magnetic pole group, the third magnetic pole group, and the first coil.

2. An electrical machine, comprising: Armature section; and An excitation unit capable of relative movement relative to the armature portion; The excitation unit includes: a plurality of excitation cores arranged in the relative movement direction (i.e., the mechanical action direction) between the armature unit and the excitation unit, and a plurality of magnets respectively disposed between two adjacent excitation cores. The armature portion includes: a first armature core and a second armature core separated in a direction intersecting with the direction of mechanical action; a core-connecting structure magnetically coupling the first armature core and the second armature core; and a plurality of coils. The first armature core has a first magnetic pole group and a second magnetic pole group arranged and magnetically coupled in the direction of mechanical action. The second armature core has a third and a fourth magnetic pole group arranged and magnetically coupled in the direction of said mechanical action. The position of the first magnetic pole group in the direction of mechanical action corresponds to the position of the third magnetic pole group in the direction of mechanical action. The position of the second magnetic pole group in the direction of mechanical action corresponds to the position of the fourth magnetic pole group in the direction of mechanical action. The plurality of coils includes a first coil disposed in one of the first magnetic pole group and the third magnetic pole group. A first magnetic flux through the first coil and a second magnetic flux through the first coil are formed by one or more of the plurality of magnets. The first magnetic circuit for the flow of the first magnetic flux includes the first magnetic pole group, the second magnetic pole group, the third magnetic pole group, the fourth magnetic pole group, the excitation core, and the magnet. The second magnetic circuit for the flow of the second magnetic flux includes the first magnetic pole group, the core-connection structure, the third magnetic pole group, the excitation core, and the magnet. The excitation unit has a first surface and a second surface along the direction of the mechanical action. The first armature core is located in a first direction that intersects the mechanical action direction with respect to the first surface of the excitation part, and the second armature core is located in a second direction that intersects the mechanical action direction with respect to the second surface of the excitation part.

3. The electrical machinery as described in claim 1, wherein, At least one of the first armature core and the second armature core is a stacked steel plate comprising multiple stacked steel plates, having multiple fitting holes for the multiple core connecting portions to be respectively embedded in the stacking direction of the steel plates. In the at least one armature core, a slit extending from the mating hole in a direction intersecting the stacking direction relative to the steel plate or an opening is formed for each of the plurality of mating holes.

4. The electrical machinery as described in claim 1 or 3, wherein, The excitation unit is capable of rotating relative to the armature unit about its axis. At least one of the first armature core and the second armature core is a stacked steel plate comprising multiple stacked steel plates, having multiple fitting holes for the multiple core connecting portions to be respectively embedded in the stacking direction of the steel plates. The at least one armature core is formed with a slit that intersects with a closed curve that passes through the plurality of fitting holes and is formed between the plurality of magnetic pole groups in the at least one armature core and surrounds the axis.

5. The electrical machinery as described in claim 2, wherein, The core connection structure includes a plurality of core connection portions arranged in the direction of mechanical action. At least one of the first armature core and the second armature core is a stacked steel plate comprising multiple stacked steel plates, having multiple fitting holes for the multiple core connecting portions to be respectively embedded in the stacking direction of the steel plates. In the at least one armature core, a slit extending from the mating hole in a direction intersecting the stacking direction relative to the steel plate or an opening is formed for each of the plurality of mating holes.

6. The electrical machinery as described in claim 2 or 5, wherein, The excitation unit is capable of rotating relative to the armature unit about its axis. The core connection structure includes a plurality of core connection portions arranged in the rotational direction. At least one of the first armature core and the second armature core is a stacked steel plate comprising multiple stacked steel plates, having multiple fitting holes for the multiple core connecting portions to be respectively embedded in the stacking direction of the steel plates. The at least one armature core is formed with a slit that intersects with a closed curve that passes through the plurality of fitting holes and is formed between the plurality of magnetic pole groups in the at least one armature core and surrounds the axis.

7. The electrical machinery as described in claim 1 or 2, wherein, The core interconnect structure is integrally formed with one of the first armature core and the second armature core.

8. The electrical machinery as described in claim 2 or 5, wherein, The core connection structure includes a plurality of core connection portions arranged in the direction of mechanical action. The first armature core has a first magnetic yoke portion, and the first magnetic pole group and the second magnetic pole group are formed on the excitation portion side of the first magnetic yoke portion. The second armature core has a second yoke portion, and the third and fourth magnetic pole groups are formed on the excitation portion side of the second yoke portion. The plurality of core connecting portions include a core connecting portion that magnetically couples the first magnetic yoke portion and the second magnetic yoke portion, and is disposed at a position in the mechanical action direction corresponding to the position of the first magnetic pole group and the position of the third magnetic pole group.

9. The electrical machinery as described in any one of claims 1-3 and 5, wherein, Each of the first magnetic pole group, the second magnetic pole group, the third magnetic pole group, and the fourth magnetic pole group includes a plurality of magnetic poles arranged in the direction of mechanical action.

10. The electrical machinery as claimed in claim 9, wherein, Each of the plurality of magnetic poles has a shape that protrudes toward the excitation section.

11. The electrical machinery as claimed in claim 9, wherein, Each of the plurality of magnetic poles comprises: a body having a shape protruding toward the excitation section, and a protrusion extending from the body in a direction intersecting with the direction of mechanical action.

12. The electrical machinery as described in any one of claims 1-3 and 5, wherein, The number of phases of the electrical machinery is an odd number of 3 or more. The armature section includes one coil or two or more coils with the same winding direction for each phase. The first magnetic pole group and the third magnetic pole group constitute a first magnetic pole pair. The second magnetic pole group and the fourth magnetic pole group constitute a second magnetic pole pair. The coil is provided in each of the first magnetic pole pair and the second magnetic pole pair. When the polarities are the same and the angle between two adjacent excitation cores is 360 degrees in electrical degrees, the first pair of magnetic poles and the second pair of magnetic poles are substantially separated by 360 × (n + m / s) degrees in electrical degrees. Here, s, m, and n represent the following numbers, respectively: s: Phase number; m: an integer greater than 1 and less than s-1, excluding divisors of s and multiples of divisors, and excluding 1; n: An integer greater than or equal to 1.

13. The electrical machinery as claimed in claim 12, wherein, The excitation section and the armature section are capable of relative rotation. When (number of poles in the excitation section) / 2 is set to p, and the number of coils for each phase is set to c, (360 / p)×(n+m / s) is essentially equal to 360 / s / c.

14. The electrical machinery as described in any one of claims 1-3 and 5, wherein, The number of phases of the electrical machinery is an odd number of 3 or more. The armature section includes, for each phase, a coil pair consisting of two coils with different winding directions. The first armature core has a first magnetic pole group, a second magnetic pole group, and a fifth magnetic pole group. The second armature core has the third pole group, the fourth pole group, and the sixth pole group. The first magnetic pole group and the third magnetic pole group constitute a first magnetic pole pair. The second magnetic pole group and the fourth magnetic pole group constitute a second magnetic pole pair. The fifth magnetic pole group and the sixth magnetic pole group constitute the third magnetic pole pair. The winding direction of the coil in the first magnetic pole pair is the same as that of the coil in the second magnetic pole pair. The coil in the first magnetic pole pair and the coil in the third magnetic pole pair constitute the coil pair. When the polarities are the same and the angle between two adjacent excitation cores is 360 degrees in electrical degrees, (i) the first pair of magnetic poles and the second pair of magnetic poles are substantially separated by 360 × (n + m / s) degrees in electrical degrees, and (ii) the first pair of magnetic poles and the third pair of magnetic poles are substantially separated by 360 × (q + 1 / 2) degrees in electrical degrees. Here, s, m, n, and q represent the following numbers, respectively: s: Phase number; m: an integer greater than 1 and less than s-1, excluding divisors of s and multiples of divisors, and excluding 1; n: an integer greater than or equal to 1; q: An integer greater than or equal to 1.

15. The electrical machinery as claimed in claim 14, wherein, The excitation section and the armature section are capable of relative rotation. When (number of poles in the excitation section) / 2 is set to p, and the number of coil pairs for each phase is set to c, (360 / p)×(n+m / s) is essentially equal to 360 / s / c.

16. The electrical machinery as described in any one of claims 1-3 and 5, wherein, The number of phases of the electrical machinery is an even number of two or more. The armature section includes, for each phase, a coil pair consisting of two coils with different winding directions. The first armature core has a first magnetic pole group, a second magnetic pole group, and a fifth magnetic pole group. The second armature core has the third, fourth, and sixth magnetic pole groups. The first magnetic pole group and the third magnetic pole group constitute a first magnetic pole pair. The second magnetic pole group and the fourth magnetic pole group constitute a second magnetic pole pair. The fifth magnetic pole group and the sixth magnetic pole group constitute the third magnetic pole pair. The winding direction of the coil in the first magnetic pole pair is the same as that of the coil in the second magnetic pole pair. The coil in the first magnetic pole pair and the coil in the third magnetic pole pair constitute the coil pair. When the polarities are the same and the angle between two adjacent excitation cores is 360 degrees in electrical degrees, (i) the first pair of magnetic poles and the second pair of magnetic poles are substantially separated by 360 × (n + m / s / 2) degrees in electrical degrees, and (ii) the first pair of magnetic poles and the third pair of magnetic poles are substantially separated by 360 × (q + 1 / 2) degrees in electrical degrees. Here, s, m, n, and q represent the following numbers, respectively: s: Phase number; m: an integer greater than 1 and less than s-1, excluding divisors of s and multiples of divisors, and excluding 1; n: an integer greater than or equal to 1; q: An integer greater than or equal to 1.

17. The electrical machinery as claimed in claim 16, wherein, The excitation section and the armature section are capable of relative rotation. When (number of poles in the excitation section) / 2 is set to p, and the number of coil pairs for each phase is set to c, (360 / p)×(n+m / s / 2) is essentially equal to 180 / s / c.

18. The electrical machinery as described in any one of claims 1-3 and 5, wherein, Each of the plurality of magnets is magnetized in the direction of the mechanical action. Each of the plurality of excitation cores comprises two partial excitation cores disposed between two adjacent magnets and separated in the direction of mechanical action.

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