Motor component and motor

Abstract

An intervening core (100) is provided between two magnets (90) adjacent to each other in a circumferential direction (CD). An outer surface of the magnet (90) includes a first opposed surface (91), a second opposed surface (92), a first end surface (93), and a second end surface (94). The first opposed surface (91) and the second opposed surface (92) are aligned in a radial direction (RD), and the first end surface (93) and the second end surface (94) are aligned in the circumferential direction (CD). A plurality of orientations (OR) are distributed in the magnet (90). At least some of the plurality of orientations (OR) have a first orientation component (ORa) along the radial direction (RD) and a second orientation component (ORb) along the circumferential direction (CD). The second orientation component (ORb) is larger on the second opposed surface (92) side than on the first opposed surface (91) side, and is larger on the end surface (93, 94) side than on a vertical center part (97) side. The first orientation component (ORa) is smaller on the second opposed surface (92) side than on the first opposed surface (91) side, and is smaller on the end surface (93, 94) side than on the vertical center part (97) side.

Description

Motor parts and motors CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application is based on Patent Application No. 2024-055135 filed in Japan on March 29, 2024, and the contents of the original application are incorporated by reference in their entirety.

[0002] The disclosure herein relates to motor components and motors.

[0003] Patent Document 1 describes a permanent magnet motor including a stator and a rotor arranged radially opposite each other, and the rotor has a plurality of permanent magnets arranged in the circumferential direction.

[0004] JP 2011-217517 A

[0005] The permanent magnets described in Patent Document 1 are magnetized in the radial direction. This means that the magnetic flux of the permanent magnets tends to form a magnetic path in the radial direction. This may increase the magnetic flux on the side of the rotor that faces the stator and has the permanent magnets.

[0006] One object of the present disclosure is to provide a motor component and a motor in which an increase in magnetic flux in a specific region is suppressed.

[0007] The multiple aspects disclosed in this specification employ different technical means to achieve their respective objectives. Furthermore, the reference symbols in parentheses in the claims and this section are merely examples showing the correspondence between specific means described in the embodiments below as one aspect, and do not limit the technical scope.

[0008] In order to achieve the above object, the disclosed aspect is a motor component comprising: a plurality of motor magnets aligned in a second direction intersecting a first direction; and an interposition portion including a soft magnetic material, which is provided between two adjacent motor magnets aligned in the second direction, wherein the motor magnets have: a first surface and a second surface aligned in the first direction; a first end portion and a second end portion aligned in the second direction; and a plurality of orientations distributed between the first surface and the second surface and between the first end portion and the second end portion, at least a portion of the plurality of orientations having a first orientation component along the first direction and a second orientation component along the second direction, the first orientation component extending from one of the first surface and the second surface to the other in the first direction, being smaller in the first direction on the second surface side than on the first surface side, and being smaller in the second direction on each of the first end portion and the second end portion than on the central portion between the first end portion and the second end portion, The second orientation component is larger on the second surface side than on the first surface side in the first direction, and larger on the first end side and the second end side than on the central portion side between the first end and the second end in the second direction, and the second orientation component is in the opposite direction between the central portion and the first end and between the central portion and the second end.

[0009] This suppresses the formation of a magnetic path on the second surface side of the motor magnet, and in a configuration in which the motor magnet is incorporated into a motor, suppresses an increase in magnetic flux on the second surface side (specific region) of the motor magnet.

[0010] Furthermore, the magnetic flux passing from the motor magnet through the interposed portion is prevented from decreasing, and as a result, the function of the interposed portion as a pseudo pole is prevented from being reduced.

[0011] The disclosed aspect is a motor comprising: an exciter that is excited when current is applied; and a field element that is aligned with the exciter in a first direction and moves relative to the exciter in a second direction that intersects the first direction, wherein the field element comprises a plurality of motor magnets aligned in the second direction, and an intervening portion that is provided between two adjacent motor magnets aligned in the second direction and that forms a magnetic path through which magnetic flux passes; the motor magnet comprises: a first surface and a second surface aligned in the first direction; a first end portion and a second end portion aligned in the second direction; and a plurality of orientations distributed between the first surface and the second surface and between the first end portion and the second end portion, wherein at least a portion of the plurality of orientations has a first orientation component along the first direction and a second orientation component along the second direction, The first orientation component extends from one of the first surface and the second surface to the other in the first direction, and is smaller on the second surface side than on the first surface side in the first direction, and smaller on each of the first end side and the second end side than on the central portion between the first end and the second end in the second direction; the second orientation component is larger on the second surface side than on the first surface side in the first direction, and larger on each of the first end side and the second end side than on the central portion between the first end and the second end in the second direction; and the second orientation component is in opposite directions between the central portion and the first end and between the central portion and the second end.

[0012] The motor can achieve the same effects as the motor component.

[0013] 1. Plan view of a motor in a first embodiment. A perspective view of a rotor. A partial plan view of a rotor. A partial plan view of a rotor and a stator unfolded so that the circumferential direction is a linear direction. A view of a rotor unfolded on a plane as viewed from the radial outside. A view showing the orientation direction of an N magnet. A view for explaining a magnet angle. A view illustrating orientation measurement results. A partial plan view of a rotor in a second embodiment. A view showing the orientation direction of an N magnet. A plan view of a motor in a third embodiment. A partial plan view of a rotor. A partial plan view of a rotor and a stator unfolded so that the circumferential direction is a linear direction. A view of a rotor unfolded on a plane as viewed from the radial outside. A view showing the orientation direction of an S magnet. A partial plan view of a rotor in a fourth embodiment. A view showing the orientation direction of an S magnet. A view of a rotor unfolded on a plane as viewed from the radial outside in a fifth embodiment. A view showing the orientation direction of an N magnet. A view of a rotor unfolded on a plane as viewed from the radial outside in a sixth embodiment. A view showing the orientation direction of an N magnet. A view of a rotor unfolded on a plane as viewed from the radial outside in a seventh embodiment. 13. Partial plan view of a rotor in an eighth embodiment. Partial plan view of a rotor in a ninth embodiment. Partial plan view of a rotor in a tenth embodiment. Partial plan view of a rotor in an eleventh embodiment. Partial plan view of a rotor in a twelfth embodiment. Partial plan view of a rotor in a thirteenth embodiment. Partial plan view of a rotor in a fourteenth embodiment. Partial plan view of a rotor in a fifteenth embodiment. Partial plan view of a rotor in a sixteenth embodiment. Partially exploded perspective view of a rotor in a seventeenth embodiment. Partially exploded perspective view of a rotor in an eighteenth embodiment. Plan view of an outer rotor type motor in a nineteenth embodiment. Plan view of a brushed motor in a twentieth embodiment. Schematic longitudinal cross-sectional view of an axial motor in a twenty-first embodiment. Plan view of a rotor. A view of a rotor and a stator expanded on a plane as viewed from the radially outside. Perspective view of a linear motor in a twenty-second embodiment. Partial longitudinal cross-sectional view of a linear motor.

[0014] Hereinafter, several embodiments for carrying out the present disclosure will be described with reference to the drawings. In each embodiment, parts corresponding to matters described in the preceding embodiment will be assigned the same reference numerals, and duplicate descriptions may be omitted. In each embodiment, when only a part of the configuration is described, other previously described embodiments may be applied to the other parts of the configuration. In addition to combinations of parts that are specifically specified as being combinable in each embodiment, it is also possible to partially combine embodiments even if not specified, as long as there is no particular problem with the combination.

[0015] <First embodiment> A motor 10 shown in Fig. 1 is provided in various devices and the like. The motor 10 drives the various devices and the like to operate them. The motor 10 is supplied with power from a power supply unit such as a battery. The motor 10 functions as an electric motor when power is supplied from the power supply unit. The motor 10 is a multi-phase AC motor. The motor 10 is a motor generator. The motor 10 functions as a generator during regeneration. The motor 10 is sometimes referred to as a rotating electric machine.

[0016] In the following description, the three mutually orthogonal directions are referred to as an axial direction AD, a radial direction RD, and a circumferential direction CD. The radial direction RD is sometimes referred to as a radial direction, and the axial direction AD is sometimes referred to as an axial direction.

[0017] An imaginary line that runs along the linear axial direction AD and passes through the center of the motor 10 is referred to as the motor axis Cm. Unless otherwise specified, hereinafter, the direction that intersects with and is perpendicular to the motor axis Cm will be referred to simply as the radial direction RD. The direction around the motor axis Cm will be referred to simply as the circumferential direction CD. Furthermore, of the two directions spaced apart in the radial direction RD, the side farther from the motor axis Cm may be referred to as the radially outer side or outer circumferential side, and the side closer to the motor axis Cm may be referred to as the radially inner side or inner circumferential side.

[0018] The motor 10 has a housing 11, a shaft 12, a stator 30, and a rotor 40. The housing 11 is made of a metal material or the like. The housing 11 is a housing whose outer and inner peripheral surfaces are formed in an annular shape. At least a portion of the shaft 12, the stator 30, and the rotor 40 are housed in the space surrounded by this annular inner peripheral surface.

[0019] 1 and 2, the stator 30 is a stator, and the rotor 40 is a rotor. The shaft 12 is fixed to the rotor 40. The shaft 12 and the rotor 40 rotate relative to the stator 30. The shaft 12 and the rotor 40 rotate about a motor axis Cm. The motor axis Cm extends in the axial direction AD through the center of the shaft 12 and the center of the rotor 40. The motor axis Cm is the rotation axis of the motor 10. The shaft 12 extends in the axial direction AD along the motor axis Cm. The rotor 40 rotates about the shaft 12. The shaft 12 corresponds to the rotation axis. The shaft 12 is rotatably supported by bearing members such as bearings. The motor 10 is sometimes referred to as a rotary motor that performs rotary motion.

[0020] The motor 10 is a radial gap type motor. Radial gap type motors are sometimes called radial motors. In the motor 10, a stator 30 and a rotor 40 are arranged in the radial direction RD. The motor 10 is provided with one stator 30 and one rotor 40. A radial gap 20 is present between the stator 30 and the rotor 40. The radial gap 20 is a gap. The stator 30 and the rotor 40 are arranged in the radial direction RD with the radial gap 20 interposed therebetween.

[0021] In this embodiment, the rotor 40 is provided on the inner periphery of the stator 30. For example, the motor 10 is a brushless motor. The motor 10 in which the rotor 40 is provided on the inner periphery of the stator 30 is sometimes referred to as an inner rotor type motor. The rotor 40 provided on the inner periphery of the stator 30 is sometimes referred to as an inner rotor.

[0022] The stator 30 is fixed to the housing 11. The stator 30 extends in the circumferential direction CD along the inner circumferential surface of the housing 11. For example, the stator 30 is formed in an annular shape as a whole. The stator 30 is an exciter that is excited by passing current through it. The stator 30 is sometimes called an armature. The stator 30 has a stator core 31 and a coil 35. The stator 30 is excited by passing current through the coil 35. The coil 35 is formed from an electric wire or the like and is capable of passing current through it.

[0023] The stator core 31 is an iron core. The stator core 31 is made of a soft magnetic material or the like. The stator core 31 can form a magnetic path through which magnetic flux such as interlinkage magnetic flux passes. The stator core 31 has core teeth 32 and a core outer periphery 33. A plurality of core teeth 32 are arranged in the circumferential direction CD along the inner circumferential surface of the housing 11. Coils 35 are wound around the core teeth 32. The core outer periphery 33 is provided on the outer periphery of the core teeth 32. The core outer periphery 33 supports the core teeth 32. The core outer periphery 33 is fixed directly or indirectly to the housing 11. The core outer periphery 33 extends in the circumferential direction CD so as to be wrapped around the plurality of core teeth 32. For example, the core outer periphery 33 is formed in an annular shape.

[0024] The rotor 40 is a field element. The field element corresponds to a motor component. In this embodiment, the rotor 40 corresponds to the motor component. The rotor 40 has a rotor core 50 and magnets 90. In the rotor 40, the magnets 90 generate a magnetic field. The magnet pieces 60 are attached to the rotor core 50 by adhesive or the like. The rotor core 50 is formed in an overall cylindrical shape. Multiple magnets 90 are arranged in the circumferential direction CD along the outer peripheral edge of the rotor core 50.

[0025] The rotor core 50 has a magnet support portion 51, a holder fixing portion 52, a holder arm portion 53, and an intervening core 100. The magnet support portion 51, the holder fixing portion 52, the holder arm portion 53, and the intervening core 100 are integrally formed by integral molding or the like. The magnet support portion 51 forms the outer circumferential side of the rotor core 50. The magnet support portion 51 extends in the circumferential direction CD so as to be annular. The magnet support portion 51 supports a magnet 90. The magnet support portion 51 corresponds to a support portion. The magnet 90 is fixed to the magnet support portion 51. The magnet 90 is provided on the outer circumferential side of the rotor core 50. A plurality of magnets 90 are arranged along the outer circumferential surface 51a of the magnet support portion 51.

[0026] The holder fixing portion 52 constitutes the inner circumferential side of the rotor core 50. The holder fixing portion 52 extends in the circumferential direction CD so as to be annular. The holder fixing portion 52 is provided on the inner circumferential side of the magnet support portion 51. The holder fixing portion 52 is fixed to the shaft 12. For example, the shaft 12 is fixed to the holder fixing portion 52 in a state where it is inserted into the inner circumferential side of the holder fixing portion 52.

[0027] The holder arm portion 53 connects the magnet support portion 51 and the holder fixing portion 52. The holder arm portion 53 extends in the radial direction RD so as to bridge between the magnet support portion 51 and the holder fixing portion 52. A plurality of holder arm portions 53 are arranged in the circumferential direction CD.

[0028] The rotor core 50 is formed from a metal material or the like. At least a portion of the rotor core 50 is formed from a soft magnetic material or the like. In the rotor core 50, at least the magnet support portion 51 and the intervening core 100 are formed containing a soft magnetic material. The magnet support portion 51 and the intervening core 100 are soft magnetic bodies. In the rotor core 50, at least the magnet support portion 51 and the intervening core 100 can form a magnetic path through which magnetic flux such as interlinkage magnetic flux passes. The magnetic path is sometimes referred to as a magnetic circuit. The magnet support portion 51 is a back core for the magnet 90 described below. The magnet support portion 51 and the intervening core 100 are sometimes referred to as a yoke or a yoke. The magnet support portion 51 and the intervening core 100 have the property of passing magnetic flux.

[0029] The intermediate core 100 extends from the magnet support portion 51 toward the outer periphery. The intermediate core 100 is a convex portion provided on the outer periphery surface 51a. The intermediate core 100 is formed integrally with the magnet support portion 51. A plurality of the intermediate cores 100 are arranged in the circumferential direction CD along the outer periphery surface 51a. A magnet 90 is provided between two intermediate cores 100 adjacent to each other in the circumferential direction CD. The intermediate cores 100 position the magnet pieces 60 at least in the circumferential direction CD. The intermediate cores 100 correspond to an intermediate portion.

[0030] The rotor 40 has a field annular portion 70. The field annular portion 70 is formed by magnets 90 and intervening cores 100. In the field annular portion 70, a plurality of magnets 90 and intervening cores 100 are arranged in a ring shape. For example, the magnets 90 and the intervening cores 100 are arranged alternately one by one in the circumferential direction CD. The field annular portion 70 is formed in an annular or ring shape and extends in the axial direction AD. The field annular portion 70 is included in a motor component. The field annular portion 70 has an annular outer peripheral surface 71, an annular inner peripheral surface 72, a first annular surface 73, and a second annular surface 74. The surfaces 71 to 74 are included in the outer surface of the field annular portion 70.

[0031] The annular outer peripheral surface 71 is the outer peripheral surface of the field annular portion 70. In a plan view of the field annular portion 70 seen from the axial direction AD, the annular outer peripheral surface 71 extends in the circumferential direction CD along the outer peripheral edge of the field annular portion 70. For example, the annular outer peripheral surface 71 forms the outer peripheral end of the field annular portion 70. The annular inner peripheral surface 72 is the inner peripheral surface of the field annular portion 70. In a plan view, the annular inner peripheral surface 72 extends in the circumferential direction CD along the inner peripheral edge of the field annular portion 70. For example, the annular outer peripheral surface 71 forms the inner peripheral end of the field annular portion 70. Both the outer peripheral end and the inner peripheral end of the field annular portion 70 are circular. In the field annular portion 70, the outer peripheral end and the inner peripheral end each form an arc. In the field annular portion 70, the outer peripheral end and the inner peripheral end are concentric. The center of the annular outer peripheral surface 71 and the center of the annular inner peripheral surface 72 are both located at positions through which the motor axis Cm passes.

[0032] Of the pair of end faces of the field annular portion 70, one is a first annular surface 73 and the other is a second annular surface 74. The annular surfaces 73, 74 extend in a direction perpendicular to the axial direction AD. The first annular surface 73 and the second annular surface 74 extend parallel to each other. The first annular surface 73 and the second annular surface 74 are aligned in the axial direction AD via the annular outer peripheral surface 71 and the annular inner peripheral surface 72. The annular outer peripheral surface 71 and the annular inner peripheral surface 72 extend in the axial direction AD so as to span between the first annular surface 73 and the second annular surface 74.

[0033] The field ring portion 70 is a component that constitutes part of the motor 10. The field ring portion 70 is fixed to the magnet support portion 51. In the motor 10, the component in which the field ring portion 70 and the magnet support portion 51 are integrated is sometimes referred to as a motor component.

[0034] The annular field portion 70 has a plurality of magnets 90. The plurality of magnets 90 are arranged in a row in the circumferential direction CD along the outer peripheral surface of the magnet support portion 51. Each of the plurality of magnets 90 extends in the axial direction AD, and the plurality of magnets 90 are not arranged in the axial direction AD. The plurality of magnets 90 form a first annular surface 73 and a second annular surface 74 of the annular field portion 70. Note that a configuration in which the plurality of magnets 90 are arranged in a row in the axial direction AD may also be employed.

[0035] When power is supplied to the motor 10 from the power supply unit, a magnetic field is generated as current flows through the coils 35. In this magnetic field, multiple magnetic fluxes MF are passed between the stator 30 and the rotor 40. The magnetic path through which this magnetic flux MF passes is determined by the magnetic fluxes emitted from the stator 30 and the rotor 40, as well as the surrounding housing 11 and other components. On the stator 30 side, the magnetic flux passes through the core teeth 32, the core outer periphery 33, and other components. On the rotor 40 side, the magnetic flux passes through the magnets 90, the magnet support portion 51, and other components.

[0036] 3, the multiple magnetic fluxes MF include a first magnetic flux MF1 and a second magnetic flux MF2. The magnetic fluxes MF1 and MF2 flow from the stator 30 toward the rotor 40. The magnetic fluxes MF1 and MF2 then make a U-turn at the rotor 40 and flow from the rotor 40 toward the stator 30. For example, the magnetic fluxes MF1 and MF2 flow so as to be passed between the two core teeth 32 via the field annular portion 70. The first magnetic flux MF1 does not extend beyond the field annular portion 70 to the side opposite the core teeth 32 in the radial direction RD.

[0037] The first magnetic flux MF1 and the second magnetic flux MF2 coexist in the rotor 40. In the rotor 40, the magnetic path through which the first magnetic flux MF1 passes is a closed magnetic path within the field annular portion 70. The magnetic path through which the second magnetic flux MF2 passes is a magnetic path that passes through the magnet support portion 51 (back core).

[0038] In the motor 10, the orientation OR of the magnet 90 is set so as to reduce the number of second magnetic fluxes MF2. The orientation OR of the magnet 90 is also set so as to increase the number of first magnetic fluxes MF1. For example, in the magnet 90, the orientation OR is set so that magnetic fluxes MF, such as interlinkage magnetic fluxes, are concentrated near the center of the magnet 90. The orientation OR is also the orientation of the field annular portion 70. The orientation OR faces the direction of easy magnetization in the magnet 90. The direction of easy magnetization is the direction in which magnet 90 is easily magnetized. The orientation OR is sometimes referred to as magnet orientation. In the motor 10, the presence of an orientation OR in the magnet 90 is sometimes expressed as the magnet 90 having multiple orientations OR. The magnet 90 is sometimes referred to as an anisotropic magnet.

[0039] As shown in Figures 3 and 4, in the magnet 90, the orientation OR as a whole faces the circumferential direction CD. As shown in Figure 4, the orientation OR is not inclined toward the axial direction AD with respect to the radial direction RD. On the other hand, as shown in Figure 3, in the magnet 90, at least some of the orientations OR are inclined toward the circumferential direction CD with respect to the radial direction RD. In Figure 3 and other figures, the orientations OR are indicated by hollow arrows. The hollow arrows indicate the direction of the orientations OR. For convenience, if the orientations OR have a size, the size of the orientations OR is the same for all orientations OR. In other words, in the magnet 90, the size of the orientations OR is constant. Note that it is conceivable that an infinite number of orientations OR may exist in the magnet 90, but for convenience, only a predetermined number are illustrated in Figure 3 and other figures. Although some bias may occur in an actual magnet, the illustration shows a predetermined number of orientations OR as being evenly distributed.

[0040] The direction of the orientation OR is expressed by the size and angle of the orientation component. As shown in FIG. 6 , the orientation OR has a first orientation component ORa and a second orientation component ORb. The first orientation component ORa is an orientation component in the radial direction RD. The second orientation component ORb is an orientation component in the circumferential direction CD. The orientation OR is decomposed into the radial direction RD and the circumferential direction CD, and is decomposed into the first orientation component ORa and the second orientation component ORb. The orientation OR is obtained by combining the first orientation component ORa and the second orientation component ORb. The orientation components ORa and ORb have sizes corresponding to the direction of the orientation OR. As described above, in the magnet 90, the size of the orientation OR is constant, so the orientation components ORa and ORb have a relationship such that as the second orientation component ORb increases, the first orientation component ORa decreases, and as the second orientation component ORb decreases, the first orientation component ORa increases.

[0041] In this embodiment, the radial direction RD corresponds to the first direction, and the circumferential direction CD corresponds to the second direction. The first orientation component ORa is an orientation component in the first direction. The second orientation component ORb is an orientation component in the second direction. The magnet 90 corresponds to the motor magnet. A configuration in which the magnet 90 and the stator 30 are arranged side by side in the radial direction RD corresponds to a configuration in which the motor magnet and the exciter are arranged side by side in the first direction.

[0042] The orientation components of the orientation OR include the first orientation component ORa, the second orientation component ORb, and a third orientation component. The third orientation component is an orientation component in the axial direction AD. In this embodiment, a magnet 90 is assumed in which the third orientation component of the orientation OR is zero. The orientation OR is not inclined with respect to the axial direction AD. For example, the orientation OR faces one side in a direction perpendicular to the motor axis Cm. In this embodiment, the axial direction AD corresponds to the third direction. The third orientation component is an orientation component in the third direction.

[0043] The orientation OR may be inclined toward the axial direction AD with respect to the radial direction RD. For example, the third orientation component of the orientation OR may not be zero. Even with this configuration, the magnitude of the orientation OR in a planar view is constant in the magnet 90, regardless of the magnitude of the third orientation component. For example, in the magnet 90, the magnitude of the orientation OR obtained by combining the first orientation component ORa and the second orientation component ORb is constant regardless of the magnitude of the third orientation component.

[0044] As shown in FIG. 5 , the orientation OR has an orientation angle θ. The orientation angle θ is the angle of the orientation OR. The orientation angle θ is the angle between the radial direction RD and the orientation OR. Two angles are formed by the radial direction RD and the orientation OR, and the orientation angle θ is the smaller of the two angles. The orientation angle θ is 90° or less. The orientation angle θ is the inclination angle of the orientation OR inclined toward the circumferential direction CD with respect to the radial direction RD. For example, the orientation angle θ is the inclination angle of the orientation OR inclined toward the second reference line Lr2 with respect to the first reference line Lr1. The first reference line Lr1 is a reference line extending in the first direction. For example, the first reference line Lr1 is a virtual line that passes through the motor axis Cm and extends linearly in the radial direction RD. The second reference line Lr2 is a reference line that extends in the second direction. For example, the second reference line Lr2 is a virtual line that extends linearly in the circumferential direction CD. The first reference line Lr1 and the second reference line Lr2 are perpendicular to each other and perpendicular to the motor axis Cm.

[0045] The first reference line Lr1 is a normal to the annular outer peripheral surface 71 and the annular inner peripheral surface 72 of the field annular portion 70. The radial direction RD is sometimes referred to as the normal direction in which a normal line extends. The second reference line Lr2 is a tangent to the annular outer peripheral surface 71 of the field annular portion 70 or the outer peripheral surface 51a of the magnet support portion 51. The circumferential direction CD is sometimes referred to as the tangential direction in which a tangent line extends. The circumferential direction CD is also sometimes referred to as the rotation direction or movement direction. There can be an infinite number of first reference lines Lr1, but for convenience, only one or more are illustrated in Figure 1 and the like. There can also be an infinite number of second reference lines Lr2, but for convenience, only one or more are illustrated in Figure 1 and the like.

[0046] The orientation angle θ is in the range of 0° or more and 90° or less. The relationship of 0°≦θ≦90° holds for the orientation angle θ. The orientation angle θ indicates the angle between the orientation OR and the first reference line Lr1, based on the orientation of the orientation OR. For example, in FIG. 5, the orientation angle θ is the angle between the head of the arrow in the orientation OR and the first reference line Lr1. Therefore, for convenience, the orientation angle θ may be the same for multiple orientations OR that are oriented differently from each other. For example, the orientation angle θ may be the same for an orientation OR facing the upper left of the page in FIG. 5 and an orientation OR facing the lower left of the page in FIG. 5. Furthermore, the orientation angle θ may be the same for an orientation OR facing the upper left of the page in FIG. 5 and an orientation OR facing the upper right of the page in FIG. 5.

[0047] As described above, since the magnitude of the orientation OR is constant in magnet 90, the orientation angle θ is determined by the magnitude relationship between the first orientation component ORa and the second orientation component ORb. For magnet 90, Equations 1 and 2 hold true.

[0048] A1=A cos θ (Equation 1) A2=A sin θ (Equation 2) In Equations 1 and 2, for convenience, the magnitude of the alignment OR is designated as A, the magnitude of the first alignment component ORa is designated as A1, and the magnitude of the second alignment component ORb is designated as A2.

[0049] The magnet 90 is a magnetic member formed from a magnetic material or the like. Examples of magnetic members include sintered magnets and bonded magnets. One magnet 90 is formed from one magnetic member. The magnetic material is a material containing magnetic powder. The magnet 90 is formed containing magnetic powder. The magnetic powder is sometimes referred to as magnetic powder or magnetic powder. In the magnet 90, the magnetic powder is in a magnetized state. In the field annular portion 70, multiple magnets 90 are fixed to each other with an adhesive or the like. Note that in this embodiment, the magnet 90 is the smallest component of the field annular portion 70, but this is not limiting. The smallest component may be smaller or larger than the magnet 90 shown in this embodiment. For example, the smallest component may be half or twice the size of the magnet 90.

[0050] In the magnet 90, the direction of the orientation OR is set by magnetization or the like. Fine magnetic powder is used as the magnetic powder of the magnet 90. In the magnet 90, the degree of freedom regarding the orientation OR is increased due to the fine magnetic powder. In the magnet 90, the arrangement of the orientation OR is complex. In the magnet 90, multiple orientations OR are distributed so as to reduce the number of second magnetic fluxes MF2.

[0051] The magnetic powder forming the magnet 90 includes magnetic powder made of a metal material. Magnetic powder made of a metal material includes base metal magnetic powder, rare metal magnetic powder, and rare earth magnetic powder. Base metal magnetic powder is magnetic powder made of a base metal. Rare metal magnetic powder is magnetic powder made of a rare metal. Rare earth magnetic powder is magnetic powder made of a rare earth. The magnet 90 is formed including at least one of base metal magnetic powder, rare metal magnetic powder, and rare earth magnetic powder.

[0052] The magnet 90 is formed in a substantially rectangular parallelepiped shape. In reality, the magnet 90 has a shape that extends along an arc, as shown in Figure 2. In Figure 6 and other figures, the curved lines that extend along the arc of the magnet 90 are illustrated as straight lines. As shown in Figure 6, the magnet 90 has a first opposing surface 91, a second opposing surface 92, a first end surface 93, a second end surface 94, a first side surface 95, and a second side surface 96. These surfaces 91 to 96 are included in the outer surface of the magnet 90.

[0053] The opposing surfaces 91, 92 extend in a direction perpendicular to the radial direction RD. The opposing surfaces 91, 92 extend in the circumferential direction CD so as to span between a first end surface 93 and a second end surface 94. The first opposing surface 91 and the second opposing surface 92 are aligned in the radial direction RD via surfaces 93 to 96. In the annular field portion 70, the first opposing surface 91 is located on the outer circumferential side, and the second opposing surface 92 is located on the inner circumferential side. The first opposing surface 91 is included in the annular outer circumferential surface 71. The second opposing surface 92 is included in the annular inner circumferential surface 72. The first opposing surface 91 faces the stator 30 across the radial gap 20. The second opposing surface 92 is on the opposite side of the stator 30 in the radial direction RD. The second opposing surface 92 is superimposed on the outer circumferential surface 51a of the magnet support portion 51. The first opposing surface 91 corresponds to the first surface, and the second opposing surface 92 corresponds to the second surface.

[0054] The end faces 93, 94 extend in a direction perpendicular to the circumferential direction CD. The end faces 93, 94 extend in the radial direction RD so as to bridge the first opposing surface 91 and the second opposing surface 92. The first end face 93 and the second end face 94 are aligned in the circumferential direction CD via the surfaces 91, 92, 95, and 96. In two magnets 90 adjacent to each other in the circumferential direction CD, the first end face 93 of one magnet 90 and the second end face 94 of the other magnet 90 are overlapped with each other. The first end face 93 corresponds to the first end, and the second end face 94 corresponds to the second end.

[0055] The side surfaces 95, 96 extend in a direction perpendicular to the axial direction AD. The first side surface 95 and the second side surface 96 are aligned in the axial direction AD via the end surfaces 93, 94 and the opposing surfaces 91, 92. The first side surface 95 is included in the first annular surface 73. The second side surface 96 is included in the second annular surface 74.

[0056] In the following, to explain the magnet 90 in more detail, the magnet 90 will be subdivided. When subdivided, the magnet 90 has a vertical central portion 97, opposing parallel portions 98, and end surface parallel portions 99. These subdivided elements are set for the sake of convenience, and in reality, some of them are not clearly separate entities. Some of the vertical central portion 97, opposing parallel portions 98, and end surface parallel portions 99 may be included in the rest. These subdivided elements are set to explain specific locations on the magnet 90.

[0057] The vertical central portion 97 is the central portion of the magnet 90 in the circumferential direction CD. The vertical central portion 97 is located midway between the first end face 93 and the second end face 94 in the circumferential direction CD. The vertical central portion 97 extends in the radial direction RD so as to span between the first opposing surface 91 and the second opposing surface 92. The vertical central portion 97 corresponds to the center. The vertical central portion 97 is sometimes referred to as the middle portion of the magnetic pole.

[0058] The vertical central portion 97 does not have to be exactly at the center between the first end face 93 and the second end face 94. The vertical central portion 97 may be located on the first end face 93 side or the second end face 94 side from this center position. Furthermore, the vertical central portion 97 may not be a line, but may have a certain width in the circumferential direction CD. This width may be, for example, one to one-third of the length of the magnet 90 in the circumferential direction CD. When the vertical central portion 97 has a width in the circumferential direction CD in this way, the vertical central portion 97 includes the exact center position between the first end face 93 and the second end face 94.

[0059] The opposing parallel portions 98 are regions of the magnet 90 that extend parallel to the first opposing surface 91 and the second opposing surface 92. A plurality of opposing parallel portions 98 are arranged in the radial direction RD of the magnet 90. The plurality of opposing parallel portions 98 include a region that extends in the circumferential direction CD along the first opposing surface 91, a region that extends in the circumferential direction CD along the second opposing surface 92, and a region that extends in the circumferential direction CD through the center of the magnet 90. Although the magnet 90 has many opposing parallel portions 98, for convenience, only three opposing parallel portions 98 are illustrated in FIG. 6 in accordance with the outline arrows indicating the orientation OR.

[0060] In magnet 90, the orientation OR at the opposing parallel portion 98 that is closest to the first opposing surface 91 among the multiple opposing parallel portions 98 is the orientation OR on the first opposing surface 91 side. The orientation components ORa and ORb at this opposing parallel portion 98 are the orientation components ORa and ORb on the first opposing surface 91 side. Also, in magnet 90, the orientation OR at the opposing parallel portion 98 that is closest to the second opposing surface 92 among the multiple opposing parallel portions 98 is the orientation OR on the second opposing surface 92 side. The orientation components ORa and ORb at this opposing parallel portion 98 are the orientation components ORa and ORb on the second opposing surface 92 side.

[0061] The end face parallel portions 99 are regions of the magnet 90 that extend parallel to the first end face 93 and the second end face 94. A plurality of the end face parallel portions 99 are arranged in the circumferential direction CD on the magnet 90. The plurality of end face parallel portions 99 include a region extending in the radial direction RD along the first end face 93, a region extending in the radial direction RD along the second end face 94, and a region extending in the radial direction RD along the vertical central portion 97. For example, a plurality of the end face parallel portions 99 are arranged in the circumferential direction CD between the first end face 93 and the vertical central portion 97, and between the second end face 94 and the vertical central portion 97. While the magnet 90 has many end face parallel portions 99, FIG. 6 illustrates only six end face parallel portions 99 for convenience, in accordance with the outline arrows indicating the orientation OR.

[0062] In magnet 90, the orientation OR at the end face parallel portion 99 closest to the first end face 93 among the multiple end face parallel portions 99 is the orientation on the first end face 93 side. The orientation components ORa and ORb at this end face parallel portion 99 are the orientation components ORa and ORb on the first end face 93 side. Also, in magnet 90, the orientation OR at the end face parallel portion 99 closest to the second end face 94 among the multiple end face parallel portions 99 is the orientation on the second end face 94 side. The orientation components ORa and ORb at this end face parallel portion 99 are the orientation components ORa and ORb on the second end face 94 side.

[0063] In Figure 6 and other figures, the magnet 90 is shown as a rectangular shape in plan view as a schematic plan view of the magnet 90. However, in reality, as shown in Figures 1 and 2, the magnet 90 is formed in a roughly fan shape in plan view. Therefore, in the magnet 90, the opposing surfaces 91 and 92 are curved so as to bulge outward. The distance between the first end surface 93 and the second end surface 94 gradually increases toward the outer periphery. Meanwhile, the first side surface 95 and the second side surface 96 extend parallel to each other with a constant distance between them.

[0064] The intervening core 100 is formed in a substantially rectangular parallelepiped shape. In reality, the intervening core 100 has a shape that extends along an arc, as shown in Fig. 2 . In Fig. 5 and other figures, the curved lines that extend along the arcs of the intervening core 100 are illustrated as straight lines. As shown in Fig. 5 , the intervening core 100 has a first core facing surface 101, a second core facing surface 102, a first core end face 103, a second core end face 104, a first core face 105, and a second core face 106. These faces 101 to 106 are included in the outer surface of the intervening core 100.

[0065] The core opposing surfaces 101, 102 extend in a direction perpendicular to the radial direction RD. The core opposing surfaces 101, 102 extend in the circumferential direction CD so as to span between the first core end face 103 and the second core end face 104. The first core opposing surface 101 and the second core opposing surface 102 are aligned in the radial direction RD via surfaces 103 to 106. In the field annular portion 70, the first core opposing surface 101 faces the outer periphery, and the second core opposing surface 102 faces the inner periphery. The first core opposing surface 101 is included in the annular outer periphery surface 71. The second core opposing surface 102 is included in the annular inner periphery surface 72. The first core opposing surface 101 faces the stator 30 across the radial gap 20. The second core opposing surface 102 faces the opposite side of the stator 30 in the radial direction RD. The second core facing surface 102 is placed over the outer peripheral surface of the magnet support portion 51. The second core facing surface 102 is included in the boundary between the intermediate core 100 and the magnet support portion 51.

[0066] The core end faces 103, 104 extend in a direction perpendicular to the circumferential direction CD. The core end faces 103, 104 extend in the radial direction RD along the first reference line Lr1. For example, the core end faces 103, 104 are not inclined in the circumferential direction CD with respect to the first reference line Lr1. The core end faces 103, 104 extend in the radial direction RD so as to bridge between the first core opposing surface 101 and the second core opposing surface 102. The first core end face 103 and the second core end face 104 are aligned in the circumferential direction CD via the surfaces 101, 102, 105, and 106. In the field annular portion 70, the first core end face 103 faces one side in the circumferential direction CD, and the second core end face 104 faces the other side in the circumferential direction CD.

[0067] The core surfaces 105, 106 extend in a direction perpendicular to the axial direction AD. The first core surface 105 and the second core surface 106 are aligned in the axial direction AD via the core end surfaces 103, 104 and the core facing surfaces 101, 102. The first core surface 105 is included in the first annular surface 73. The second core surface 106 is included in the second annular surface 74.

[0068] In the field annular portion 70, the magnet 90 and the intermediate core 100 are adjacent to each other in the circumferential direction CD. At the boundary between the magnet 90 and the intermediate core 100, one of the end faces 93, 94 and one of the core end faces 103, 104 overlap each other. For example, in the intermediate core 100 located between two magnets 90 adjacent to each other in the circumferential direction CD, the first core end face 103 overlaps the second end face 94 of one of the magnets 90, and the second core end face 104 overlaps the first end face 93 of the other magnet 90.

[0069] Magnet 90 has an S pole and an N pole as magnetic poles. Magnet 90 has an S pole face, which is the surface that forms the S pole, and an N pole face, which is the surface that forms the N pole. In magnet 90, magnetic flux MF is generated so that it enters the interior of magnet 90 through the S pole face. In addition, magnetic flux MF is generated so that it leaves the interior of magnet 90 through the N pole face.

[0070] 3 and 5, the motor 10 has N magnets 90N as the magnets 90. In the field annular portion 70, all of the magnets 90 are N magnets 90N. In the field annular portion 70, the N magnets 90N and the intervening cores 100 are arranged alternately one by one in the circumferential direction CD. In the field annular portion 70, the intervening core 100 is provided between two N magnets 90N adjacent to each other in the circumferential direction CD.

[0071] As shown in Figures 3, 5, and 6, the N magnet 90N passes magnetic flux in a direction approaching the stator 30 in the radial direction RD. The N magnet 90N is set so that the orientation OR faces the first opposing surface 91 as a whole. For example, the N magnet 90N is set so that the orientation OR does not face the second opposing surface 92 or the end faces 93 and 94. The first opposing surface 91 of the N magnet 90N is the N-pole surface. The strength of the N-pole at the first opposing surface 91 of the N magnet 90N is not uniform.

[0072] In the N magnet 90N, the second opposing surface 92, the first end surface 93, and the second end surface 94 are S-pole surfaces. In the N magnet 90N, the strength of the S-pole is not uniform in each of the second opposing surface 92, the first end surface 93, and the second end surface 94. In the second opposing surface 92, there is an S-pole portion at a position away from the vertical center portion 97 toward the first end surface 93, and at a position away from the vertical center portion 97 toward the second end surface 94. For example, there is an S-pole portion at the corner where the second opposing surface 92 and the first end surface 93 intersect, and at the corner where the second opposing surface 92 and the second end surface 94 intersect.

[0073] In the north magnet 90N, the first opposing surface 91, which is the north pole surface, may be referred to as the first opposing surface 91N. In addition, in the north magnet 90N, the second opposing surface 92, which is the south pole surface, the first end surface 93, and the second end surface 94 may be referred to as the second opposing surface 92S, the first end surface 93S, and the second end surface 94S.

[0074] 3, 5, and 6, in the N magnet 90N, the orientations OR are set so as to change the direction of the magnetic flux MF flowing within the N magnet 90N from the circumferential direction CD to the radial direction RD. In the N magnet 90N, multiple orientations OR are distributed between the first opposing surface 91 and the second opposing surface 92, and between the first end face 93 and the second end face 94. In the N magnet 90N, the orientations of the multiple orientations OR are set so as to bend the magnetic flux MF flowing in the circumferential direction CD from the S magnet 90S toward the N magnet 90N toward the radial direction RD from the N magnet 90N toward the stator 30.

[0075] In the N magnet 90N, as a whole, the multiple orientations OR face the first opposing surface 91 in the radial direction RD. In the N magnet 90N, at least some of the multiple orientations OR have a first orientation component ORa along the radial direction RD. In the N magnet 90N, the first orientation component ORa faces from the second opposing surface 92 to the first opposing surface 91 in the radial direction RD. The N magnet 90N has multiple orientations OR with a first orientation component ORa facing from the second opposing surface 92 to the first opposing surface 91. The N magnet 90N corresponds to the second motor magnet.

[0076] In the N magnet 90N, the orientations of the orientations OR in the circumferential direction CD are different between the first end face 93 side and the second end face 94 side across the vertical center portion 97. On the first end face 93 side of the vertical center portion 97, the multiple orientations OR face toward the vertical center portion 97 as a whole. On the second end face 94 side of the vertical center portion 97, the multiple orientations OR face toward the vertical center portion 97 as a whole. The orientations OR on the first end face 93 side of the vertical center portion 97 and the orientations OR on the second end face 94 side of the vertical center portion 97 face each other as a whole in the circumferential direction CD.

[0077] In the N magnet 90N, at least some of the multiple orientations OR have a second orientation component ORb along the circumferential direction CD. In the N magnet 90N, the second orientation component ORb is oriented in opposite directions between the first end face 93 and the vertical central portion 97 and between the second end face 94 and the vertical central portion 97. In the N magnet 90N, between the first end face 93 and the vertical central portion 97, the second orientation component ORb is oriented from the first end face 93 to the vertical central portion 97 in the circumferential direction CD. In the N magnet 90N, between the second end face 94 and the vertical central portion 97, the second orientation component ORb is oriented from the second end face 94 to the vertical central portion 97 in the circumferential direction CD.

[0078] The intermediate core 100 functions as a pseudo pole by being disposed between two magnets 90 adjacent in the circumferential direction CD. In this embodiment, the intermediate core 100 functions as a pseudo south magnet by being disposed between two north magnets 90N adjacent in the circumferential direction CD. In the intermediate core 100 functioning as a pseudo south magnet, the first core facing surface 101 functions as a pseudo south pole surface. Note that the intermediate core 100 functioning as a pseudo south magnet performs the same function as the south magnet 90S in the third embodiment described below. The intermediate core 100 is sometimes referred to as a pseudo pole portion.

[0079] On the annular outer peripheral surface 71, a first core opposing surface 101 is provided between two first opposing surfaces 91 adjacent to each other in the circumferential direction CD. In this embodiment, the two first opposing surfaces 91 adjacent to each other in the circumferential direction CD with the first core opposing surface 101 interposed therebetween are both N-pole surfaces, and therefore the first core opposing surface 101 functions as a pseudo S-pole surface by being located between the two N-pole surfaces. The interposed core 100 functions as a pseudo pole, and is therefore included in the magnetic path through which the magnetic flux MF passes, as shown in FIG. 3 .

[0080] The motor 10 is a consequen-pole motor. A consequen-pole motor is sometimes called a consequen-pole motor. A consequen-pole motor is equipped with only one of an N magnet and an S magnet. In this embodiment, the motor 10 is equipped with an N magnet 90N and an interposed core 100, but does not have an S magnet, thereby realizing a consequen-pole motor.

[0081] As shown in FIG. 6 , in the N magnet 90N, the magnitude of the second orientation component ORb varies among the orientations OR. The second orientation component ORb is larger on the second opposing surface 92 side than on the first opposing surface 91 side in the radial direction RD. That is, the second orientation component ORb is smaller on the stator 30 side than on the side farther from the stator 30 in the radial direction RD. The second orientation component ORb gradually increases from the first opposing surface 91 side toward the second opposing surface 92 side. For example, the second orientation component ORb gradually increases continuously from the first opposing surface 91 side toward the second opposing surface 92 side. Note that the second orientation component ORb may also gradually increase in stages from the first opposing surface 91 side toward the second opposing surface 92 side.

[0082] In each of the plurality of end surface parallel portions 99, the second alignment component ORb is larger on the second opposing surface 92 side than on the first opposing surface 91 side. For example, in the end surface parallel portion 99 at the left end in Figures 6 and 7, the second alignment component ORb of the alignment ORmn on the second opposing surface 92 side is larger than the second alignment component ORb of the alignment OR1n on the first opposing surface 91 side.

[0083] Furthermore, the second alignment component ORb gradually increases from the first opposing surface 91 side toward the second opposing surface 92 side in each of the multiple end surface parallel portions 99. For example, in the end surface parallel portion 99 at the left end in Figures 6 and 7, the second alignment component ORb of the alignment OR2n at the intermediate position is larger than the second alignment component ORb of the alignment OR1n, but is smaller than the second alignment component ORb of the alignment ORmn.

[0084] It should be noted that the relationship in which the second orientation component ORb is larger on the second opposing surface 92 side than on the first opposing surface 91 side does not necessarily have to hold for the entire N magnet 90N. In other words, the relationship between the multiple end face parallel portions 99 does not necessarily have to hold such that the second orientation component ORb is larger on the second opposing surface 92 side than on the first opposing surface 91 side. For example, the second orientation component ORb of the orientation ORm1 on the second opposing surface 92 side of the third end face parallel portion 99 from the left in Figure 6 does not have to be larger than the second orientation component ORb of the orientation OR1n on the first opposing surface 91 side of the leftmost end face parallel portion 99 in Figure 6.

[0085] Furthermore, the relationship in which the second orientation component ORb gradually increases from the first opposing surface 91 toward the second opposing surface 92 does not necessarily have to hold for the entire N magnet 90N.

[0086] The second alignment component ORb is larger on each of the first end face 93 side and the second end face 94 side than on the vertical central portion 97 side in the circumferential direction CD. The second alignment component ORb gradually increases from the vertical central portion 97 side toward the first end face 93 side and the second end face 94 side. For example, the second alignment component ORb gradually increases continuously from the vertical central portion 97 side toward the end faces 93, 94 side. Note that the second alignment component ORb may also gradually increase in stages from the vertical central portion 97 side toward the end faces 93, 94 side. The degree of change in the second alignment component ORb is not particularly limited.

[0087] In each of the plurality of opposing parallel portions 98, the second alignment component ORb is larger on the first end face 93 side and the second end face 94 side than on the vertical central portion 97 side. For example, in the opposing parallel portion 98 at the top in Figures 6 and 7, the second alignment component ORb of the alignment OR1n on the first end face 93 side is larger than the second alignment component ORb of the alignment OR11 on the vertical central portion 97 side.

[0088] Furthermore, the second alignment component ORb gradually increases from the vertical central portion 97 toward the first end surface 93 and the second end surface 94 in each of the multiple opposing parallel portions 98. For example, in the opposing parallel portion 98 at the upper end in Figures 6 and 7, the second alignment component ORb of the alignment OR12 at the intermediate position is larger than the second alignment component ORb of the alignment OR11, but smaller than the second alignment component ORb of the alignment OR1n.

[0089] The relationship in which the second orientation component ORb is larger on each of the first end face 93 side and the second end face 94 side than on the vertical central portion 97 side does not necessarily have to hold for the entire N magnet 90N. In other words, the relationship between the multiple opposing parallel portions 98 does not necessarily have to hold such that the second orientation component ORb is larger on each of the first end face 93 side and the second end face 94 side than on the vertical central portion 97 side. For example, in Figure 6, the second orientation component ORb of the orientation OR1n on the vertical central portion 97 side of the lower opposing parallel portion 98 does not have to be larger than the second orientation component ORb of the orientation ORm1 on the first end face 93 side of the upper opposing parallel portion 98 in Figure 6.

[0090] Furthermore, the relationship in which the second orientation component ORb gradually increases from the vertical center portion 97 toward the first end face 93 and the second end face 94 does not necessarily have to hold true for the entire N magnet 90N.

[0091] In the N magnet 90N, the magnitude of the first orientation component ORa varies among the orientations OR. In the radial direction RD, the first orientation component ORa is larger on the first opposing surface 91 side than on the second opposing surface 92 side. The first orientation component ORa gradually increases from the second opposing surface 92 side toward the first opposing surface 91 side.

[0092] In each of the plurality of end face parallel portions 99, the first alignment component ORa is larger on the first opposing surface 91 side than on the second opposing surface 92 side. In addition, in each of the plurality of end face parallel portions 99, the first alignment component ORa gradually increases from the second opposing surface 92 side toward the first opposing surface 91 side.

[0093] It should be noted that the relationship that the first orientation component ORa is larger on the first opposing surface 91 side than on the second opposing surface 92 side does not necessarily have to hold for the entire N magnet 90N. Similarly, the relationship that the first orientation component ORa gradually increases from the second opposing surface 92 toward the first opposing surface 91 side does not necessarily have to hold for the entire N magnet 90N.

[0094] The first alignment component ORa is larger in the circumferential direction CD on the side of the vertical central portion 97 than on the side of the first end face 93 and the side of the second end face 94. The first alignment component ORa gradually increases from the side of the first end face 93 and the side of the second end face 94 toward the side of the vertical central portion 97.

[0095] In each of the plurality of opposing parallel portions 98, the first alignment component ORa is larger on the vertical central portion 97 side than on the first end face 93 side and the second end face 94 side. In each of the plurality of opposing parallel portions 98, the first alignment component ORa gradually increases from the first end face 93 side and the second end face 94 side toward the vertical central portion 97 side.

[0096] The relationship that the first orientation component ORa is larger on the vertical center portion 97 side than on each of the first end face 93 side and the second end face 94 side does not necessarily have to hold for the entire N magnet 90N. Similarly, the relationship that the first orientation component ORa gradually increases from each of the first end face 93 side and the second end face 94 side toward the vertical center portion 97 side does not necessarily have to hold for the entire N magnet 90N.

[0097] As shown in Figure 5, the orientation angle θ of the N magnet 90N varies among the multiple orientations OR. The orientation angle θ is larger on the second opposing surface 92 side than on the first opposing surface 91 side in the radial direction RD. That is, the orientation angle θ is smaller on the stator 30 side in the radial direction RD than on the side farther from the stator 30. The orientation angle θ gradually increases from the first opposing surface 91 side toward the second opposing surface 92 side. That is, the orientation angle θ gradually decreases from the side farther from the stator 30 toward the stator 30 in the radial direction RD.

[0098] In the N magnet 90N, in each of the multiple end face parallel portions 99, the orientation angle θ on the second opposing surface 92 side is larger than the orientation angle θ on the first opposing surface 91 side. For example, in the end face parallel portion 99 at the left end in Figure 6, the orientation angle θmn on the second opposing surface 92 side is larger than the orientation angle θ1n on the first opposing surface 91 side (see Figure 5).

[0099] Furthermore, in the N magnet 90N, the orientation angle θ of each of the multiple end face parallel portions 99 increases the closer to the second opposing surface 92 in the radial direction RD. That is, the orientation angle θ increases the farther from the first opposing surface 91 in the radial direction RD. For example, in the end face parallel portion 99 at the left end in Figure 6, the orientation angle θ2n at the intermediate position is larger than the orientation angle θ1n on the first opposing surface 91 side, but smaller than the orientation angle θmn on the second opposing surface 92 side (see Figure 5).

[0100] Note that the relationship that the orientation angle θ on the second opposing surface 92 side is larger than the orientation angle θ on the first opposing surface 91 side does not necessarily have to hold for the entire N magnet 90N. In other words, the relationship between the multiple end face parallel portions 99 does not necessarily have to hold that the orientation angle θ on the second opposing surface 92 side is larger than the orientation angle θ on the first opposing surface 91 side. For example, in the first magnet piece 60N1, the orientation angle θm1 on the second opposing surface 92 side of the third end face parallel portion 99 from the left in Figure 6 does not have to be larger than the orientation angle θ1n on the first opposing surface 91 side of the end face parallel portion 99 at the left end in Figure 6 (see Figure 5).

[0101] Furthermore, the relationship that the orientation angle θ increases the closer to the second opposing surface 92 in the radial direction RD does not necessarily have to hold for the entire N magnet 90N.

[0102] The orientation angle θ is larger in the circumferential direction CD on the first end face 93 side and the second end face 94 side than on the vertical central portion 97 side. The orientation angle θ gradually increases from the vertical central portion 97 side toward the first end face 93 side and the second end face 94 side.

[0103] In each of the plurality of opposing parallel portions 98, the orientation angle θ is larger on the first end face 93 side and the second end face 94 side than on the vertical central portion 97 side. For example, in the opposing parallel portion 98 at the top in Fig. 6, the orientation angle θ1n on the first end face 93 side is larger than the orientation angle θ11 on the vertical central portion 97 side (see Fig. 5).

[0104] Furthermore, in the N magnet 90N, the orientation angle θ in each of the multiple opposing parallel portions 98 is larger the closer it is to the first end face 93 and the second end face 94 in the circumferential direction CD. That is, the orientation angle θ is larger the farther it is from the vertical center portion 97 in the radial direction RD. For example, in the opposing parallel portion 98 at the upper end in Figure 6, the orientation angle θ12 at the intermediate position is larger than the orientation angle θ11 on the vertical center portion 97 side, but is smaller than the orientation angle θ1n on the first end face 93 side.

[0105] It should be noted that the relationship that the orientation angle θ is larger on the end face 93, 94 side than on the vertical central portion 97 side does not necessarily have to hold for the entire N magnet 90N. In other words, the relationship between the multiple opposing parallel portions 98 does not necessarily have to hold that the orientation angle θ is larger on the end face 93, 94 side than on the vertical central portion 97 side. For example, in the N magnet 90N, the orientation angle θ1n on the first end face 93 side of the lower opposing parallel portion 98 in Figure 6 does not have to be larger than the orientation angle θm1 on the vertical central portion 97 side of the upper opposing parallel portion 98 in Figure 6 (see Figure 5).

[0106] Furthermore, the relationship that the orientation angle θ is larger the closer to the end faces 93, 94 in the circumferential direction CD does not necessarily have to hold for the entire N magnet 90N.

[0107] In this embodiment, as shown in Figure 5, the reference for the orientation angle θ is set separately on the first end face 93 side and the second end face 94 side of the N magnet 90N via the vertical central portion 97 so that the orientation angle θ is within the range of 0° to 90°.

[0108] In the N magnet 90N, the reference state for the orientation angle θ is when the orientation OR overlaps the first reference line Lr1 and faces the first opposing surface 91. Between the vertical center portion 97 and the first end face 93 of the N magnet 90N, the orientation angle θ is set from 0° to 90° clockwise, with 0° as the reference, corresponding to the orientation OR being tilted toward the vertical center portion 97 with respect to the first reference line Lr1. Meanwhile, between the vertical center portion 97 and the second end face 94 of the N magnet 90N, the orientation angle θ is set from 0° to 90° counterclockwise, with 0° as the reference, corresponding to the orientation OR being tilted toward the vertical center portion 97 with respect to the first reference line Lr1.

[0109] In FIG. 7 , the angle obtained by converting the length of one magnet 90 in the circumferential direction CD into an electrical angle is equal to or greater than the length corresponding to an electrical angle of 180° in the circumferential direction CD. In the motor 10, the magnet angle α of the magnet 90 is greater than the reference electrical angle β. The magnet angle α is an angle indicating the length of the magnet 90 in the circumferential direction CD. The angle obtained by converting this length into an electrical angle is greater than the reference electrical angle β. If the distance between the motor axis Cm and the magnet 90 in the radial direction RD is constant, the greater the magnet angle α, the greater the length dimension of the magnet 90 in the circumferential direction CD. The reference electrical angle β is a mechanical angle corresponding to an electrical angle of 180°.

[0110] In magnet 90, magnet angle α is the same in every region in radial direction RD. Magnet angle α is a value that indicates the distance between first end face 93 and second end face 94 in degrees. In magnet 90, end faces 93, 94 are not inclined toward the circumferential direction CD with respect to first reference line Lr1, so magnet angle α is constant in every region in radial direction RD. In magnet 90, magnet angle α at first opposing surface 91 and magnet angle α at second opposing surface 92 are the same value.

[0111] In the intervening core 100, the core angle γ (see FIG. 28 ) is constant at any position in the radial direction RD. The core angle γ is an angle indicating the length of the intervening core 100 in the circumferential direction CD. If the distance between the motor axis Cm and the intervening core 100 in the radial direction RD is constant, the larger the core angle γ, the greater the length dimension of the intervening core 100 in the circumferential direction CD. The core angle γ is a value indicating the distance between the first core end face 103 and the second core end face 104 in degrees. In the intervening core 100, the core angle γ is constant throughout the radial direction RD because the core end faces 103, 104 are not inclined toward the circumferential direction CD with respect to the first reference line Lr1. In the intervening core 100, the core angle γ at the first core facing surface 101 and the core angle γ at the second core facing surface 102 are the same value.

[0112] γ = (360° - α) / M Equation 3 Equation 3 holds for the core angle γ. In Equation 3, the number of magnetic pole pairs is M. For example, FIG. 1 shows an example in which the number of magnetic pole pairs is 5. In this example, Equation 3 holds when M is 5.

[0113] Next, a method for manufacturing the motor 10 will be described. The manufacturing process for manufacturing the motor 10 includes a process for manufacturing the rotor 40. As a preparation process, a worker prepares the housing 11, shaft 12, stator 30, rotor core 50, magnet 90, and the like. The worker then attaches the magnet 90 to the rotor core 50. For example, the worker fits two magnets 90 between two adjacent intervening cores 100 from the outer periphery, and fixes the magnet 90 to the magnet support portion 51 or the intervening core 100 with an adhesive or the like. Note that the magnet 90 may be magnetized before or after the magnet 90 is attached to the rotor core 50.

[0114] Next, measuring the orientation of a motor magnet such as magnet 90 will be described. An operator can measure the orientation of a motor magnet by using a measuring device, for example. For example, the operator removes at least a portion of the motor magnet from the motor as the measurement target and measures the orientation of the measurement target. The orientation measured by the measuring device is displayed on a display screen or the like of the measuring device, with only multiple positions on the motor magnet sampled.

[0115] For example, as shown in FIG. 8 , when the orientation of the north-south magnet 90N is measured using a measuring device, the actual measured ORc orientations are displayed on a display screen or the like for multiple positions on the north-south magnet 90N. The actual ORc orientations are displayed using shapes such as triangles. The measurement results shown in FIG. 8 show that the multiple actual ORc orientations distributed on the north-south magnet 90N are oriented in the same direction as the multiple ORc orientations shown in FIG. 6 . In FIG. 8 , the locations where the actual ORc orientations are shown are the measurement locations where the orientations of the actual ORc orientations were measured. Furthermore, an operator may perform orientation analysis using electron backscatter diffraction (EBSD). Electron backscatter diffraction (EBSD) is a method for measuring the crystal orientation of a motor magnet. Electron backscatter diffraction (EBSD) can quantitatively evaluate the degree to which the easy axis of magnetization, which is the orientation of a magnet, is oriented in a given direction.

[0116] The worker may also perform orientation analysis on the motor magnet. In the orientation analysis, tasks and processes are performed to analyze the orientation of the motor magnet. For example, as part of the orientation analysis, the worker may detect the magnetic flux generated in the motor magnet using a detection device or the like, and use the detected magnetic flux to perform a process of estimating or calculating the orientation of the motor magnet. The worker may also use the results of the orientation analysis to identify the magnetic path through magnetic circuit analysis.

[0117] Next, we will explain the motor 10 in detail. In motors, polar anisotropic orientation of magnets is sometimes used to increase torque. With polar anisotropic orientation, the magnetic flux density distribution on the magnet surface becomes sinusoidal, increasing the effective magnetic flux and contributing to improving the torque of the motor.

[0118] However, with polar anisotropic orientation, the orientation path of the magnet and the magnetic path through which the magnetic flux passes tend to become concentric, so motors with a small number of magnetic poles require thicker magnets. For example, in radial motors, the magnets need to be thicker in the radial direction RD. Therefore, as the amount of magnet used increases, there are concerns that the weight of the motor will increase, the inertia of the motor will increase unnecessarily, and the torque efficiency will decrease relative to the amount of magnet used.

[0119] On the other hand, in a configuration where the orientation is parallel to make the magnet thinner, the back core of the soft magnetic material must be thickened to prevent magnetic saturation. This configuration, in addition to the inability to concentrate the magnetic flux, also raises the above-mentioned concerns about the motor. For example, in a radial motor, the orientation is oriented to one side of the radial direction RD due to parallel orientation. In parallel orientation, the orientation OR is oriented in the same direction. For example, in a parallel orientation region, the magnitude of the second orientation component ORb is the same in all orientations OR. Furthermore, in a parallel orientation region, the orientation angle θ is the same in all orientations OR.

[0120] In contrast, in this embodiment, as shown in FIG. 3 and other figures, a gradually changing orientation is employed for the magnet 90, thereby increasing the effective magnetic flux without increasing the magnet thickness or the back core. With the gradually changing orientation, the orientation OR gradually changes from one side to the other in each of the two directions, the radial direction RD and the circumferential direction CD. In the field annular portion 70, the orientation angle θ increases from the vertical center portion 97 toward the end faces 93 and 94, so that the orientation OR shifts from the radial direction RD toward the circumferential direction CD. Furthermore, in the field annular portion 70, the orientation angle θ increases from the armature side toward the anti-armature side, so that the orientation OR shifts from the radial direction RD toward the circumferential direction CD. The armature side is the stator 30 side and the radial gap 20 side of the field annular portion 70. The anti-armature side is the opposite side of the field annular portion 70 from the armature.

[0121] In the magnet 90, the change in the orientation angle θ from the first opposing surface 91 toward the second opposing surface 92 is greater than the change determined by the arc of the concentric circles resulting from polar anisotropic orientation. Furthermore, the change in the orientation angle θ from the vertical center portion 97 toward the first end surface 93 or the second end surface 94 is greater than the change determined by the arc of the concentric circles resulting from polar anisotropic orientation. For these reasons, the motor 10 employing gradual orientation can reduce the thickness of the magnet 90 and the back core compared to motors employing polar anisotropic orientation. Therefore, the motor 10 can maximize the concentration of the interlinkage magnetic flux while minimizing the thickness of the magnet 90 and the back core. By maximizing the concentration of the interlinkage magnetic flux, the motor 10 can achieve high torque generation efficiency relative to the amount of material used. In other words, the motor 10 can suppress magnetic saturation even with a thin back core, thereby achieving the desired motor torque while minimizing the amount of magnet and core used.

[0122] Examples of torque generation efficiency relative to the amount of material used include torque generation efficiency relative to the amount of magnets used and torque generation efficiency relative to the amount of cores used. The amount of magnets used is, for example, the amount of magnetic powder forming the field annular portion 70 and the magnets 90. The amount of cores used is the amount of soft magnetic material forming the back core of the magnet support portion 51. Examples of material used include the volume and weight of the material. For example, the amount of magnets used is the volume and weight of the magnetic powder. The amount of cores used is the volume and weight of the soft magnetic material.

[0123] According to the present embodiment described so far, the formation of a magnetic path on the second opposing surface 92 side of the magnet 90 is suppressed. In a configuration in which the magnet 90 is incorporated into the motor 10, an increase in magnetic flux MF on the second opposing surface 92 side of the magnet 90 is suppressed. In addition, a decrease in the magnetic flux MF passing from the magnet 90 through the intervening core 100 is suppressed. As a result, a decrease in the function of the intervening core 100 as a pseudo pole is suppressed. When converting magnetic flux into torque, an increase in magnetic flux is suppressed in areas (specific areas) where the magnet support portion 51 is required.

[0124] According to this embodiment, the second orientation component ORb is larger in the circumferential direction CD on the first end face 93 side and the second end face 94 side than on the vertical center portion 97 side. In this configuration, the magnetic flux MF passing through the first opposing surface 91 in the radial direction RD is more likely to bend toward the circumferential direction CD at positions closer to the first end face 93 or the second end face 94 in the circumferential direction CD.

[0125] Furthermore, the second orientation component ORb is larger on the second opposing surface 92 side than on the first opposing surface 91 side in the radial direction RD. In this configuration, the magnetic flux MF passing through the first opposing surface 91 in the radial direction RD is more likely to bend toward the circumferential direction CD the closer it is to the second opposing surface 92 in the radial direction RD. Therefore, it is less likely that the magnetic flux MF passing through the first opposing surface 91 in the radial direction RD will pass through the second opposing surface 92 in the radial direction RD without bending toward the circumferential direction CD. In other words, the magnetic flux MF passing through the first opposing surface 91 in the radial direction RD is more likely to pass through the first end surface 93 and the second end surface 94 in the circumferential direction CD by being bent toward the circumferential direction CD. Therefore, it is possible to prevent the magnetic flux MF passing through the first opposing surface 91 in the radial direction RD from leaking from the second opposing surface 92 to the outside of the magnet 90.

[0126] According to the present embodiment and the following, the first orientation component ORa is smaller in the circumferential direction CD on the first end face 93 side and the second end face 94 side than on the vertical central portion 97 side. In this configuration, the magnetic flux MF passing through the first opposing surface 91 in the radial direction RD tends to concentrate on the vertical central portion 97 side.

[0127] Furthermore, the first orientation component ORa is smaller in the radial direction RD on the second opposing surface 92 side than on the first opposing surface 91 side. In this configuration, it is possible to reduce the magnetic flux MF passing through the second opposing surface 92 in the radial direction RD toward the side opposite to the stator 30.

[0128] Furthermore, an intervening core 100 is provided between two adjacent magnets 90 in the circumferential direction CD. Therefore, the second orientation component ORb is larger on the intervening core 100 side than on the longitudinal center portion 97 side in the circumferential direction CD. In this configuration, the magnetic flux MF passing through the first opposing surface 91 in the radial direction RD tends to bend toward the intervening core 100 in the circumferential direction CD the closer it is to the intervening core 100 in the circumferential direction CD. Therefore, even in a consequencial pole motor 10 having only one of the north magnets and south magnets, a configuration can be realized in which the magnetic flux MF passing through the intervening core 100, which functions as a pseudo pole, tends to concentrate. This allows the desired motor torque to be obtained while reducing the amount of magnet material used.

[0129] According to the embodiment, the magnet 90 is provided on the rotor 40 as a field element. In this configuration, as described above, the magnetic flux MF is less likely to leak from the second opposing surface 92 of the magnet 90, and this makes it possible to prevent the magnetic flux MF from leaking to the outside from the rotor 40 in the radial direction RD.

[0130] According to the present embodiment, the second orientation component ORb gradually increases in the circumferential direction CD from the vertical central portion 97 toward the first end face 93 and the second end face 94. In this configuration, the tendency of the magnetic flux MF passing through the first opposing surface 91 in the radial direction RD to bend toward the circumferential direction CD gradually increases from the vertical central portion 97 toward the first end face 93 and the second end face 94. Therefore, the magnetic flux MF passing through the first opposing surface 91 in the radial direction RD is more likely to concentrate toward the vertical central portion 97.

[0131] According to the present embodiment, the second orientation component ORb gradually increases in the radial direction RD from the first opposing surface 91 side toward the second opposing surface 92 side. In this configuration, the tendency of the magnetic flux MF passing through the first opposing surface 91 in the radial direction RD to bend toward the circumferential direction CD gradually increases from the first opposing surface 91 side toward the second opposing surface 92 side. Therefore, the magnetic flux MF passing through the first opposing surface 91 in the radial direction RD is further likely to bend toward the circumferential direction CD, and is more likely to pass through the first end surface 93 and the second end surface 94.

[0132] According to this embodiment, the first orientation component ORa gradually decreases in the circumferential direction CD from the vertical central portion 97 toward the first end face 93 and the second end face 94. In this configuration, the flow of magnetic flux MF in the radial direction RD gradually increases from the first end face 93 or the second end face 94 toward the vertical central portion 97. Therefore, the magnetic flux MF passing through the first opposing surface 91 in the radial direction RD is more likely to concentrate toward the vertical central portion 97.

[0133] According to the present embodiment, the first orientation component ORa gradually decreases in the radial direction RD from the first opposing surface 91 toward the second opposing surface 92. In this configuration, the magnetic flux MF passing through the second opposing surface 92 in the radial direction RD toward the side opposite to the stator 30 can be reduced.

[0134] According to this embodiment, the angle obtained by converting the length of one magnet 90 in the circumferential direction CD into an electrical angle is equal to or greater than an electrical angle of 180° in the circumferential direction CD. This configuration makes it possible to avoid a situation where the angle indicating the size of the magnet 90 in the circumferential direction CD is insufficient for the electrical angle of 180°. Therefore, the effective magnetic flux can be increased without increasing the thickness of the magnet 90 in the radial direction RD.

[0135] For example, consider a comparative example in which the magnets 90 are oriented in a parallel configuration, unlike the present embodiment. In this comparative example, if the angle obtained by converting the length of one magnet 90 into an electrical angle is equal to or greater than 180° electrical angle, a north pole will be present at the position of a south pole in the field annular portion 70, raising concerns about a reduction in effective magnetic flux. In contrast, in this embodiment, magnetic flux MF tends to concentrate near the vertical center portion 97. In this configuration, even if the angle obtained by converting the length of one magnet 90 into an electrical angle is equal to or greater than 180° electrical angle, magnetic flux MF extending in the radial direction RD is unlikely to be generated near the first end face 93 or the second end face 94, making it less likely that the effective magnetic flux will be reduced as in the comparative example.

[0136] According to this embodiment, the magnet 90 is provided on the rotor 40. In this configuration, as described above, the magnetic flux MF is less likely to leak from the second opposing surface 92 of the magnet 90, and therefore the magnet support portion 51, which is the magnetic path inside the magnet 90, can be made thinner in the radial direction RD.

[0137] According to this embodiment, the N magnet 90N has a first orientation component ORa that extends from the second opposing surface 92 toward the first opposing surface 91 in the radial direction RD. Therefore, as shown in Figure 3, in the N magnet 90N, the magnetic flux MF that extends in the circumferential direction CD from the intermediate core 100 toward the end faces 93, 94 is more likely to bend in the radial direction RD so as to extend toward the first opposing surface 91 the closer it is to the first opposing surface 91 on the end faces 93, 94. Also, in the N magnet 90N, the magnetic flux MF that has passed through the first end face 93 or the second end face 94 in the circumferential direction CD is more likely to bend in the radial direction RD the closer it is to the vertical center portion 97.

[0138] Moreover, in the field annular portion 70, the intervening core 100 functions as a pseudo S-magnet. For example, in the intervening core 100, the magnetic flux MF extending in the radial direction RD from the stator 30 side toward the first core opposing surface 101 is more likely to bend in the circumferential direction CD toward the core end faces 103 and 104 the closer it is to the core end faces 103 and 104 on the first core opposing surface 101. Also, in this intervening core 100, the magnetic flux MF passing through the first core opposing surface 101 in the radial direction RD is more likely to bend in the circumferential direction CD the closer it is to the second core opposing surface 102. This makes it possible to prevent the magnetic flux MF from passing through the second core opposing surface 102 in the radial direction RD and leaking to the side opposite the stator 30.

[0139] Furthermore, in the rotor 40, the N magnets 90N and the intervening cores 100, which function as pseudo-S magnets, are arranged alternately in the circumferential direction CD. Therefore, the magnetic flux MF extending in the radial direction RD from the stator 30 side toward the intervening core 100 is bent in the intervening core 100 so as to extend from the first core opposing surface 101 toward the core end faces 103 and 104, making it easy to extend in the circumferential direction CD toward the N magnet 90N. The magnetic flux MF extending from the intervening core 100 to the N magnet 90N is bent in the N magnet 90N so as to extend from the end faces 93 and 94 toward the first opposing surface 91, making it easy to pass through the first opposing surface 91 and extend in the radial direction RD toward the stator 30 side. Therefore, the N magnet 90N and the intervening core 100 can prevent the magnetic flux MF from leaking in the radial direction RD from the second opposing surface 92 or the second core opposing surface 102 to the side opposite the stator 30.

[0140] According to this embodiment, the second opposing surface 92 of the magnet 90 faces the magnet support portion 51, and the magnet 90 is provided on the magnet support portion 51. With this configuration, magnetic saturation of the magnet support portion 51 due to magnetic flux MF emitted from the second opposing surface 92 of the magnet 90 is suppressed. To avoid magnetic flux leakage due to magnetic saturation of the magnet support portion 51, an increase in the thickness of the magnet support portion 51 in the radial direction RD is suppressed. As a result, an increase in the size of the magnet 90 in the radial direction RD is suppressed.

[0141] In the rotor 40 of this embodiment, the magnet support portion 51 is provided on the opposite side of the stator 30 with the N-type magnet 90N and the intervening core 100 interposed therebetween. As described above, the N-type magnet 90N and the intervening core 100 prevent the magnetic flux MF from leaking to the outside from the second opposing surface 92. Therefore, in the rotor 40, the second magnetic flux MF2 that passes from the N-type magnet 90N through the magnet support portion 51 and reaches the intervening core 100 tends to be reduced. Therefore, the cross-sectional area of ​​the magnet support portion 51 can be reduced according to the amount of the second magnetic flux MF2 that passes through the magnet support portion 51. This allows the thickness dimension of the magnet support portion 51 in the radial direction RD to be reduced. The cross-sectional area of ​​the magnet support portion 51 is the cross-sectional area of ​​a plane obtained by cutting the magnet support portion 51 in a direction perpendicular to the circumferential direction CD.

[0142] The first magnetic flux MF1 flows from the inside of the S magnet 90S to the inside of the N magnet 90N in a magnetic path that passes only through the S magnet 90S, the N magnet 90N, and any intervening objects between the N magnet 90N and the S magnet 90S, without passing through anything other than the field ring-shaped portion 70, such as the magnet support portion 51. The first magnetic flux MF1 passes through a magnetic path that is completed only within the field ring-shaped portion 70 (a completed magnetic path). The second magnetic flux MF2 forms a back-core magnetic path that includes the magnetic pole, pseudo pole, and magnet support portion 51 (back core). The back-core magnetic path is a magnetic path through which the second magnetic flux MF2 passes, and is formed by including the magnet 90, the intermediate core 100, and the magnet support portion 51. The second magnetic flux MF2 passes through the back-core magnetic path, protruding from the completed magnetic path into the magnet support portion 51. In the rotor 40, the magnetic paths through which the magnetic flux MF passes include a mixture of a complete magnetic path and a back-core magnetic path.

[0143] Furthermore, in rotor 40, the amount of second magnetic flux MF2 passing through magnet support portion 51 is reduced, making it less likely that magnetic saturation will occur in magnet support portion 51. Therefore, in rotor 40, even if magnet support portion 51 is made thinner in radial direction RD, magnetic saturation can be suppressed in magnet support portion 51. In magnet support portion 51, magnetic saturation occurs when the amount of magnetic flux MF passing through magnet support portion 51 reaches the upper limit value of magnet support portion 51.

[0144] According to this embodiment, the rotor 40 having the magnets 90 is aligned in the radial direction RD with the stator 30, which is excited by energization, and moves relative to the stator 30 in the circumferential direction CD. Therefore, the magnetic flux MF generated when energization of the stator 30 is likely to extend in the radial direction RD so as to be applied between the stator 30 and the rotor 40. With this configuration, as described above, leakage from the second opposing surface 92 of the magnets 90 is suppressed, and therefore leakage of the magnetic flux MF from the magnet support portion 51 to the side opposite the stator 30 in the rotor 40 can be suppressed. This suppresses weakening of the magnetic field generated by the motor 10 due to leakage magnetic flux from the magnet support portion 51. Therefore, by increasing the torque generation rate relative to the amount of magnet used, it is possible to achieve both improved output and a more compact motor 10.

[0145] Furthermore, as described above, in magnet 90, second orientation component ORb is larger on the end faces 93, 94 side than on the vertical center portion 97 side. In this configuration, magnetic flux MF extending across stator 30 and rotor 40 tends to concentrate at a position on the vertical center portion 97 side in the circumferential direction CD. In this way, the magnetic flux MF tends to concentrate around vertical center portion 97, which strengthens the magnetic field generated when current is applied to coil 35, thereby increasing motor output such as motor torque.

[0146] According to this embodiment, the magnet 90 is provided in a radial motor. In the radial motor, the first opposing surface 91 and the second opposing surface 92 are aligned in a radial direction RD perpendicular to the shaft 12. Furthermore, the first end surface 93 and the second end surface 94 are aligned in a circumferential direction CD around the shaft 12. With this configuration, an increase in magnetic flux MF on the second opposing surface 92 side of the magnet 90 can be suppressed in the radial motor.

[0147] Second Embodiment In a second embodiment, one magnet 90 may be divided into multiple pieces. The configuration, operation, and effects not specifically described in the second embodiment are the same as those in the first embodiment. The second embodiment will be described mainly focusing on the differences from the first embodiment. Hereinafter, the other embodiments will also be described mainly focusing on the differences from the previously described embodiments.

[0148] As shown in Figures 9 and 10, the magnet 90 has a plurality of magnet pieces 60. In this embodiment, one magnet 90 has two magnet pieces 60. In one magnet 90, the two magnet pieces 60 are arranged in the circumferential direction CD. In the field annular portion 70, a configuration in which a plurality of magnet pieces 60 are arranged in the circumferential direction CD is realized. The magnet pieces 60 are magnet members formed from a magnetic material or the like. One magnet piece 60 is formed from one magnet member.

[0149] The N magnet 90N has a first magnet piece 60N1 and a second magnet piece 60N2. The first magnet piece 60N1 and the second magnet piece 60N2 are magnet pieces 60. The first magnet piece 60N1 and the second magnet piece 60N2 are arranged adjacent to each other in the circumferential direction CD. The boundary between the first magnet piece 60N1 and the second magnet piece 60N2 extends in the radial direction RD so as to span the first opposing surface 91 and the second opposing surface 92 of the N magnet 90N. The boundary between the first magnet piece 60N1 and the second magnet piece 60N2 coincides with the vertical center portion 97 of the N magnet 90N.

[0150] The first magnet piece 60N1 and the second magnet piece 60N2 do not have to have exactly the same shape. For example, if the lengths of the first magnet piece 60N1 and the second magnet piece 60N2 are different in the circumferential direction CD, the boundary between the first magnet piece 60N1 and the second magnet piece 60N2 will not be exactly in the middle between the first end face 93 of the first magnet piece 60N1 and the second end face 94 of the second magnet piece 60N2. If the vertical center portion 97 shown in the first embodiment is a line and is located exactly in the middle between the first end face 93 of the first magnet piece 60N1 and the second end face 94 of the second magnet piece 60N2, the boundary between the first magnet piece 60N1 and the second magnet piece 60N2 will be offset in the circumferential direction CD from the vertical center portion 97.

[0151] In the N magnet 90N, the first magnet piece 60N1 and the second magnet piece 60N2 are separated by a vertical center portion 97. In the N magnet 90N, a first end face 93 is formed by the first magnet piece 60N1. The first magnet piece 60N1 has the first end face 93. In addition, in the N magnet 90N, a second end face 94 is formed by the second magnet piece 60N2. The second magnet piece 60N2 has the second end face 94.

[0152] Third Embodiment In the first embodiment, the magnets 90 included in the rotor 40 are north magnets 90N. In contrast, in the third embodiment, the magnets 90 included in the rotor 40 are south magnets 90S.

[0153] 11 to 13, the motor 10 has S magnets 90S as the magnets 90. In the field annular portion 70, all of the magnets 90 are S magnets 90S. In the field annular portion 70, the S magnets 90S and the intervening cores 100 are arranged alternately one by one in the circumferential direction CD. In the field annular portion 70, the intervening core 100 is provided between two S magnets 90S adjacent to each other in the circumferential direction CD.

[0154] 12, 14, and 15, magnetic flux MF passes through the S magnet 90S in the radial direction RD, away from the stator 30. The S magnet 90S is configured so that its orientation OR does not face the first opposing surface 91 as a whole. For example, the S magnet 90S is configured so that its orientation OR faces the second opposing surface 92 and the end faces 93 and 94 as a whole.

[0155] In the S magnet 90S, the first opposing surface 91 is the S pole surface. The S pole surface is the surface that forms the S pole of the magnet 90. The S pole is the magnetic pole of the magnet 90. In the magnet 90, magnetic flux MF is generated so that it enters the interior of the magnet 90 through the S pole surface. In the S magnet 90S, the strength of the S pole on the first opposing surface 91 is not uniform.

[0156] In the S magnet 90S, the second opposing surface 92, the first end surface 93, and the second end surface 94 are N-pole surfaces. The N-pole surface is the surface that forms the N-pole in the magnet 90. The N-pole is the magnetic pole of the magnet 90. In the magnet 90, magnetic flux MF is generated so as to exit the interior of the magnet 90 through the N-pole surface. In the S magnet 90S, the strength of the N-pole is not uniform on each of the second opposing surface 92, the first end surface 93, and the second end surface 94.

[0157] In the S magnet 90S, the first opposing surface 91, which is the S pole face, is sometimes referred to as the first opposing surface 91S. Also, in the S magnet 90S, the second opposing surface 92, which is the N pole face, the first end surface 93, and the second end surface 94 are sometimes referred to as the second opposing surface 92N, the first end surface 93N, and the second end surface 94N.

[0158] In the S magnet 90S, the orientations OR are set so as to change the direction of the magnetic flux MF flowing within the S magnet 90S from the radial direction RD to the circumferential direction CD. In the S magnet 90S, multiple orientations OR are distributed between the first opposing surface 91 and the second opposing surface 92, and between the first end face 93 and the second end face 94. In the S magnet 90S, the orientation of each of the multiple orientations OR is set so as to bend the magnetic flux MF flowing in the radial direction RD from the stator 30 toward the S magnet 90S toward the circumferential direction CD from the S magnet 90S toward the N magnet 90N.

[0159] In the S magnet 90S, as a whole, the multiple orientations OR face the second opposing surface 92 in the radial direction RD. In the S magnet 90S, at least some of the multiple orientations OR have a first orientation component ORa that is along the radial direction RD. In the S magnet 90S, the first orientation component ORa faces from the first opposing surface 91 to the second opposing surface 92 in the radial direction RD. The S magnet 90S has multiple orientations OR that have a first orientation component ORa that faces from the first opposing surface 91 to the second opposing surface 92. The S magnet 90S corresponds to the first motor magnet.

[0160] In the S magnet 90S, the orientations of the orientations OR in the circumferential direction CD are different on the first end face 93 side and the second end face 94 side, with the vertical center portion 97 in between. On the first end face 93 side of the vertical center portion 97, the multiple orientations OR face as a whole toward the first end face 93. On the second end face 94 side of the vertical center portion 97, the multiple orientations OR face as a whole toward the second end face 94. The orientations OR on the first end face 93 side of the vertical center portion 97 and the orientations OR on the second end face 94 side of the vertical center portion 97 face in opposite directions to each other as a whole in the circumferential direction CD.

[0161] In the S magnet 90S, at least some of the orientations OR have a second orientation component ORb along the circumferential direction CD. In the S magnet 90S, the second orientation component ORb is oriented in opposite directions between the first end face 93 and the vertical central portion 97 and between the second end face 94 and the vertical central portion 97. In the S magnet 90S, between the first end face 93 and the vertical central portion 97, the second orientation component ORb is oriented from the vertical central portion 97 to the first end face 93 in the circumferential direction CD. In the S magnet 90S, between the second end face 94 and the vertical central portion 97, the second orientation component ORb is oriented from the vertical central portion 97 to the second end face 94 in the circumferential direction CD.

[0162] In this embodiment, the intermediate core 100 functions as a pseudo-N magnet by being disposed between two S magnets 90S adjacent in the circumferential direction CD. In the intermediate core 100 functioning as a pseudo-N magnet, the first core facing surface 101 functions as a pseudo-N pole surface, and the core end faces 103 and 104 function as pseudo-S pole surfaces.

[0163] In this embodiment, the two first opposing surfaces 91 adjacent to each other in the circumferential direction CD via the first core opposing surface 101 are both S-pole surfaces, and therefore the first core opposing surface 101 functions as a pseudo-N-pole surface by being located between the two S-pole surfaces.

[0164] In this embodiment, the motor 10 is equipped with an S magnet 90S and an interposed core 100, but does not have an N magnet, thereby realizing a consequent pole motor.

[0165] As shown in Figure 15, in the S magnet 90S, the size of the second orientation component ORb varies among the multiple orientations OR. Similar to the second orientation component ORb in the N magnet 90N of the first embodiment, the second orientation component ORb in the S magnet 90S is larger in the radial direction RD on the second opposing surface 92 side than on the first opposing surface 91 side. Since the configuration of the S magnet 90S is similar to the configuration of the N magnet 90N of the first embodiment, detailed explanation of the size of the second orientation component ORb will be omitted.

[0166] Furthermore, in the S magnet 90S, the size of the first orientation component ORa varies among the multiple orientations OR. Similar to the first orientation component ORa in the N magnet 90N of the first embodiment, the first orientation component ORa in the S magnet 90S is larger in the radial direction RD on the first opposing surface 91 side than on the second opposing surface 92 side. As the configuration of the S magnet 90S is similar to the configuration of the S magnet 90S of the first embodiment, detailed explanation of the size of the first orientation component ORa will be omitted.

[0167] As shown in Figure 14, the orientation angle θ of the S magnet 90S varies among the multiple orientations OR. Similar to the orientation angle θ of the N magnet 90N of the first embodiment, the orientation angle θ of the S magnet 90S is larger in the radial direction RD on the second opposing surface 92 side than on the first opposing surface 91 side. Since the size of the orientation angle θ of the S magnet 90S is similar to that of the N magnet 90N of the first embodiment, a detailed description will be omitted.

[0168] In this embodiment, as shown in Figure 14, the standard for the orientation angle θ is set individually for each of the first magnet piece 60S1 and the second magnet piece 60S2 so that the orientation angle θ is within the range of 0° to 90°.

[0169] For example, in the first magnet piece 60S1 and the second magnet piece 60S2, the orientation angle θ is based on a state in which the orientation OR overlaps the first reference line Lr1 and faces the second opposing surface 92. In the first magnet piece 60S1, the orientation angle θ is set from 0° to 90° clockwise, corresponding to tilting the orientation OR relative to the first reference line Lr1 toward the opposite side of the second magnet piece 60N2. On the other hand, in the second magnet piece 60S2, the orientation angle θ is set from 0° to 90° counterclockwise, corresponding to tilting the orientation OR relative to the first reference line Lr1 toward the opposite side of the first magnet piece 60N1.

[0170] The reference for the orientation angle θ may be the same for the first magnet piece 60S1 and the second magnet piece 60S2. In this case, the orientation angle θ of the first magnet piece 60S1 is set in the range of 90° to 180°. For the first magnet piece 60S1 set in this manner, the orientation angle θ of 180° to 90° corresponds to the orientation angle θ of 0° to 90° in this embodiment. For the second magnet piece 60S2, the orientation angle θ of 180° to 270° corresponds to the orientation angle θ of 0° to 90° in this embodiment.

[0171] According to this embodiment, the S magnet 90S has a first orientation component ORa that extends in the radial direction RD from the first opposing surface 91 to the second opposing surface 92. For this reason, as shown in Figure 12, in the S magnet 90S, the magnetic flux MF that extends in the radial direction RD from the outside toward the first opposing surface 91 tends to bend in the circumferential direction CD so as to extend toward the end faces 93, 94 the closer it is to the end faces 93, 94 on the first opposing surface 91. Furthermore, in the S magnet 90S, the magnetic flux MF that has passed through the first opposing surface 91 in the radial direction RD tends to bend in the circumferential direction CD the closer it is to the second opposing surface 92.

[0172] Furthermore, in the field annular portion 70, the intervening core 100 functions as a pseudo-N magnet. For example, in the intervening core 100, the magnetic flux MF extending in the circumferential direction CD from the S magnet 90S toward the core end faces 103, 104 bends toward the radial direction RD so as to extend toward the first core facing surface 101 the closer it is to the first core facing surface 101 on the end faces 103, 104. Also, in this intervening core 100, the magnetic flux MF passing through the core end faces 103, 104 in the circumferential direction CD is more likely to bend toward the radial direction RD the farther it is from the S magnet 90S in the circumferential direction CD. This makes it possible to prevent the magnetic flux MF from passing through the first core end face 103 or the second core end face 104 in the circumferential direction CD.

[0173] Furthermore, in the rotor 40, the south magnets 90S and the intervening cores 100, which function as pseudo north magnets, are arranged alternately in the circumferential direction CD. Therefore, the magnetic flux MF extending in the radial direction RD from the stator 30 side toward the south magnets 90S is bent in the south magnets 90S so as to extend from the first opposing surface 91 toward the end faces 93 and 94, and thus tends to extend in the circumferential direction CD toward the intervening core 100. Then, the magnetic flux MF extending from the south magnets 90S toward the intervening core 100 is bent in the intervening core 100 so as to extend from the core end faces 103 and 104 toward the first core opposing surface 101. This magnetic flux MF passes through the first core opposing surface 101 and tends to extend in the radial direction RD toward the stator 30 side. Therefore, the S magnet 90S and the intermediate core 100 can prevent the magnetic flux MF from leaking from the second opposing surface 92 or the second core opposing surface 102 to the side opposite the stator 30 in the radial direction RD.

[0174] Fourth Embodiment In a fourth embodiment, one magnet 90 may be divided into a plurality of magnets.

[0175] As shown in Figures 16 and 17, the S magnet 90S has a first magnet piece 60S1 and a second magnet piece 60S2. The first magnet piece 60S1 and the second magnet piece 60S2 are magnet pieces 60. The first magnet piece 60S1 and the second magnet piece 60S2 are adjacent to each other in the circumferential direction CD. The boundary between the first magnet piece 60S1 and the second magnet piece 60S2 extends in the radial direction RD so as to span the first opposing surface 91 and the second opposing surface 92 of the S magnet 90S. The boundary between the first magnet piece 60S1 and the second magnet piece 60S2 coincides with the vertical center portion 97 of the S magnet 90S. However, this boundary may be located at a position offset from the vertical center portion 97 in the circumferential direction CD.

[0176] In the S magnet 90S, the first magnet piece 60S1 and the second magnet piece 60S2 are separated by a vertical center portion 97. In the S magnet 90S, a first end face 93 is formed by the first magnet piece 60S1. The first magnet piece 60S1 has the first end face 93. In addition, in the S magnet 90S, a second end face 94 is formed by the second magnet piece 60S2. The second magnet piece 60S2 has the second end face 94.

[0177] Fifth Embodiment In a fifth embodiment, the orientation OR of at least a portion of the magnet 90 does not have to be inclined with respect to the radial direction RD.

[0178] In this embodiment, as in the first embodiment, the magnet 90 is formed from a single magnet member. As shown in Figures 18 and 19, in a portion of the magnet 90, the orientation OR is not inclined toward the circumferential direction CD with respect to the radial direction RD. In the magnet 90, some of the orientations OR among the multiple orientations OR are not inclined with respect to the radial direction RD. The orientation OR that is not inclined with respect to the radial direction RD has a first orientation component ORa but does not have a second orientation component ORb. The orientation angle θ of the orientation OR that is not inclined with respect to the radial direction RD is 0°. The orientation of the orientation OR that is not inclined with respect to the radial direction RD is parallel to the first reference line Lr1.

[0179] In the magnet 90, the orientation OR is not tilted with respect to the radial direction RD in at least a portion of the side of the vertical central portion 97. For example, in the N magnet 90N, the orientation OR is not tilted with respect to the radial direction RD in the entire end face parallel portion 99 closest to the vertical central portion 97.

[0180] For example, as shown in FIG. 19, in the N magnet 90N, the end face parallel portion 99 closest to the vertical center portion 97 is included in the parallel orientation region.

[0181] In this embodiment, the orientation angle θ is equal between the first opposing surface 91 and the second opposing surface 92 near the magnetic pole center of the field annular portion 70. The orientation angle θ is, for example, 0° near the magnetic pole center.

[0182] In this embodiment, as in the fourth embodiment, the magnet 90 may have two magnet pieces 60. For example, in an S magnet 90S having a first magnet piece 60S1 and a second magnet piece 60S2, the end surface parallel portion 99 closest to the vertical center portion 97 is included in the parallel orientation region. In each of the first magnet piece 60S1 and the second magnet piece 60S2, the end surface parallel portion 99 closest to the vertical center portion 97 is included in the parallel orientation region.

[0183] In addition, in the N-type magnet 90N having the first magnet piece 60N1 and the second magnet piece 60N2, the end face parallel portion 99 closest to the vertical center portion 97 is included in the parallel orientation region. In each of the first magnet piece 60N1 and the second magnet piece 60N2, the end face parallel portion 99 closest to the vertical center portion 97 is included in the parallel orientation region.

[0184] Sixth Embodiment In a sixth embodiment, the orientation OR may be orthogonal to the radial direction RD in at least a portion of the magnet 90 .

[0185] As shown in Figures 21 and 21A, in part of the magnet 90, the orientation OR is perpendicular to the radial direction RD. In the magnet 90, some of the orientations OR among the multiple orientations OR are perpendicular to the radial direction RD. The orientations OR perpendicular to the radial direction RD have a second orientation component ORb but do not have a first orientation component ORa. The orientation angle θ of the orientation OR perpendicular to the radial direction RD is 90°. The direction of the orientation OR perpendicular to the radial direction RD is parallel to the second reference line Lr2.

[0186] In magnet 90, the orientation OR is perpendicular to the radial direction RD in at least a portion of the first end face 93 side and at least a portion of the second end face 94 side. For example, in magnets 90N and 90S, the orientation OR is perpendicular to the radial direction RD over the entire end face parallel portion 99 closest to end faces 93 and 94.

[0187] In this embodiment, similar to the fifth embodiment, the orientation OR is not inclined with respect to the radial direction RD in at least a portion of the magnet 90. For example, as shown in Figures 20 and 21, in the magnets 90N and 90S, the orientation OR is not inclined with respect to the radial direction RD in the entire end face parallel portion 99 closest to the vertical center portion 97.

[0188] In this embodiment, the orientation angle θ is equal between the first opposing surface 91 and the second opposing surface 92 near the magnetic pole end of the field annular portion 70. The orientation angle θ is, for example, 90° near the magnetic pole end.

[0189] Depending on the number of motor poles and design guidelines, the ratio of regions containing only one of the first and second orientation components to regions containing both the first and second orientation components can be changed. This makes it easier to design a system that maximizes torque generation efficiency relative to the amount of magnet used. Design guidelines include reducing the amount of magnet used. Furthermore, depending on the combination of the motor's number of poles and slots, it is expected that the torque generation efficiency relative to the amount of magnet used can be further improved.

[0190] Seventh Embodiment In a seventh embodiment, one magnet 90 is formed by a plurality of magnet members.

[0191] As shown in FIG. 22 , the magnet 90 includes three or more magnet pieces 60. The multiple magnet pieces 60 are arranged in the circumferential direction CD and the radial direction RD in the field annular portion 70 and the magnet 90. A first joint 81 and a second joint 82 are formed in the field annular portion 70 and the magnet 90. The joints 81 and 82 include the joining surfaces of the magnet pieces 60. Two adjacent magnet pieces 60 are joined at the joints 81 and 82 with an adhesive or the like. The joints 81 and 82 include the boundary between the magnet pieces 60. The first joint 81 includes the boundary between two magnet pieces 60 adjacent in the circumferential direction CD. The first joint 81 extends in the radial direction RD. The second joint 82 includes the boundary between two magnet pieces 60 adjacent in the radial direction RD. The second joint 82 extends in the circumferential direction CD.

[0192] The magnet pieces 60 are anisotropic magnets. The orientation OR is the same for each magnet piece 60. The entire magnet piece 60 is a region of parallel orientation. The magnet pieces 60 are sometimes referred to as parallel-oriented magnets. In the magnet 90, multiple magnet pieces 60 are arranged side by side, so that the orientation OR changes stepwise in the radial direction RD and the circumferential direction CD. The orientation OR of two adjacent magnet pieces 60 in the radial direction RD and the circumferential direction CD is different from each other.

[0193] In magnet 90, the gradually varying orientation region is formed by combining magnet pieces 60, which are relatively easy to manufacture, such as parallel-oriented magnets. In this way, a gradually varying orientation magnet is easily produced in a configuration in which multiple parallel-oriented magnets are used to form a gradually varying orientation magnet. This allows for simplification of the manufacturing equipment for producing gradually varying orientation magnets, such as magnet 90. Furthermore, a collection of parallel-oriented magnets allows for a simple approximation of gradually varying orientation to be achieved.

[0194] In the magnet 90, the multiple magnet pieces 60 are arranged so as to be line-symmetrical between the portion on the first end face 93 side and the portion on the second end face 94 side with respect to the vertical center portion 97. The magnet 90 includes multiple magnet pieces 60 that differ from one another in shape and size. For example, two magnet pieces 60 adjacent to one another in the circumferential direction CD or the radial direction RD have different shapes and sizes.

[0195] In the magnet 90, a plurality of second joints 82 extending in the circumferential direction CD are arranged in the radial direction RD. In the magnet 90, the plurality of magnet pieces 60 are arranged so that the plurality of second joints 82 arranged in the radial direction RD are not parallel to each other. One of the plurality of second joints 82 arranged in the radial direction RD is inclined toward the radial direction RD relative to the others. As a result, the plurality of second joints 82 are not concentric.

[0196] In the magnet 90, a plurality of first joints 81 extending in the radial direction RD are arranged in the circumferential direction CD. In the magnet 90, the plurality of magnet pieces 60 are arranged so that the plurality of first joints 81 arranged in the circumferential direction CD are not arranged radially. One of the plurality of first joints 81 arranged in the circumferential direction CD is inclined toward the circumferential direction CD relative to the others. As a result, the plurality of first joints 81 are not arranged radially.

[0197] In this embodiment, as described above, the multiple magnet pieces 60 are arranged so that the multiple second joints 82 are not arranged concentrically and the multiple first joints 81 are not arranged radially. Therefore, in a configuration in which an approximate gradually varying orientation is formed using multiple magnet pieces 60 that are parallel magnets, the magnetic flux MF generated by the multiple magnet pieces 60 tends to connect smoothly. This makes it easier to ensure appropriate torque generation efficiency for the magnet pieces 60. Furthermore, the smooth connection of the magnetic flux MF can also be expected to have the effect of suppressing torque ripple.

[0198] For example, unlike the present embodiment, in a configuration in which multiple second joints 82 are arranged concentrically or multiple first joints 81 are arranged radially, there are concerns that torque generation efficiency will decrease and torque ripple will be more likely to occur.

[0199] In the magnet 90, the size and shape of the magnet pieces 60 may be the same for the multiple magnet pieces 60. For example, in the magnet 90, the multiple magnet pieces 60 may be arranged so that the multiple second joints 82 are arranged concentrically. Also, the multiple magnet pieces 60 may be arranged so that the multiple first joints 81 are arranged radially.

[0200] Eighth Embodiment In the first embodiment, the outer peripheral edge of the field annular portion 70 is formed in a circular shape in a plan view. In contrast to this, in the eighth embodiment, at least a part of the outer peripheral edge of the field annular portion 70 extends linearly.

[0201] As shown in FIG. 23 , in the field annular portion 70, a portion of the outer peripheral edge extends linearly, so that the outer peripheral edge and the inner peripheral edge are not concentric. The outer peripheral edge of the magnet 90 includes multiple linear portions. The outer peripheral edge of the magnet 90 is the outer portion of the outer peripheral edge of the first side surface 95 in the radial direction RD. For example, the outer peripheral edge of the magnet 90 is the portion of the outer peripheral edge of the magnet 90 that extends along the first opposing surface 91. In this embodiment, the outer peripheral edge of the magnet 90 includes two linear portions. The outer peripheral edge of the magnet 90 includes an outer peripheral corner. The outer peripheral corner is a corner formed by two linear portions adjacent to each other in the circumferential direction CD at the outer peripheral edge of the magnet 90. The outer peripheral corner is located relative to the vertical center portion 97. For example, the outer peripheral corner is located at the boundary between two magnet pieces 60 adjacent to each other in the circumferential direction CD. The outer peripheral corners protrude outward in the radial direction RD from the outer peripheral edge of the magnet 90 .

[0202] In magnet 90, the straight line portion included in the outer peripheral edge portion is formed by first opposing surface 91. In magnet 90, at least a portion of first opposing surface 91 is a flat surface. In first opposing surface 91, multiple flat surfaces are arranged in the circumferential direction CD, thereby forming multiple straight line portions in the outer peripheral edge portion of magnet 90. The flat surface formed in first opposing surface 91 extends flatly in a direction perpendicular to radial direction RD.

[0203] The outer peripheral edge of the field annular portion 70 is shaped and sized so that the outer peripheral corners of the magnets 90 are inscribed in the outer peripheral edge of the field annular portion 70 in the first embodiment. Therefore, in this embodiment, the linear portion at the outer peripheral edge of the magnets 90 is partially inside the outer peripheral edge of the field annular portion 70 in the first embodiment, thereby reducing the volume of the field annular portion 70 and the magnets 90 compared to the first embodiment. In the field annular portion 70 and magnets 90 of this embodiment, the area between the linear portion at the outer peripheral edge of the magnets 90 and the outer peripheral end of the field annular portion 70 in the first embodiment is shaved away to a small area. This suppresses fluctuations in motor torque due to ripples, etc. This, among other things, increases the torque generation efficiency relative to the amount of magnet used. Furthermore, the orientation OR and the shape of the outer peripheral edge in a plan view of the field annular portion 70 are set to suppress ripples in the motor torque.

[0204] The annular field portion 70 may have any shape or size as long as it includes a straight portion at its outer peripheral end. For example, the outer peripheral end of the annular field portion 70 may be formed into a polygonal shape by arranging multiple straight portions in the circumferential direction CD. In this configuration, at least one straight portion may be included in the outer peripheral edge of the intervening core 100. For example, the corners of the polygon at the outer peripheral end of the annular field portion 70 may be provided between the vertical center portion 97 and the end faces 93, 94. Furthermore, one or more corners of the polygon at the outer peripheral end of the annular field portion 70 may be provided for one magnet 90 or intervening core 100, or one corner may be provided for multiple magnets 90 or intervening cores 100.

[0205] Ninth Embodiment In the eighth embodiment, a plurality of straight line portions are included in the outer peripheral edge portion of the magnet 90. In contrast to this, in the ninth embodiment, only one straight line portion is included in the outer peripheral edge portion of the magnet 90.

[0206] As shown in Figure 24, the outer peripheral edge of magnet 90 includes only one straight portion. This straight portion extends linearly in the circumferential direction CD at the outer peripheral edge of magnet 90, spanning between first end face 93 and second end face 94. In this magnet 90, the entire first opposing surface 91 is a flat surface. In this magnet 90, the single flat surface formed on first opposing surface 91 spans between first end face 93 and second end face 94.

[0207] Tenth Embodiment In the first embodiment, the inner peripheral end of the field annular portion 70 is formed in a circular shape in a plan view. In contrast to this, in the tenth embodiment, at least a part of the inner peripheral end of the field annular portion 70 extends linearly.

[0208] As shown in FIG. 25 , in the field annular portion 70, a portion of the inner peripheral edge extends linearly, so that the outer peripheral edge and the inner peripheral edge are not concentric. The inner peripheral edge of the field annular portion 70 includes multiple linear portions that extend linearly. The inner peripheral edge of the magnet 90 is the outer portion of the inner peripheral edge of the first side surface 95 in the radial direction RD. For example, the inner peripheral edge of the magnet 90 is the portion of the outer peripheral edge of the magnet 90 that extends along the second opposing surface 92. In this embodiment, the inner peripheral edge of the magnet 90 includes two linear portions. An inner peripheral corner is formed on the inner peripheral edge of the magnet 90. The inner peripheral corner is a corner formed by two linear portions adjacent to each other in the circumferential direction CD at the inner peripheral edge of the magnet 90. The inner peripheral corner is provided relative to the vertical center portion 97. For example, the inner peripheral corner is provided at the boundary between two magnet pieces 60 adjacent in the circumferential direction CD. In the magnet 90, the inner peripheral corner is recessed outward in the radial direction RD.

[0209] In magnet 90, the straight line portion included in the inner peripheral edge portion is formed by second opposing surface 92. In magnet 90, at least a portion of second opposing surface 92 is a flat surface. In second opposing surface 92, multiple flat surfaces are arranged in the circumferential direction CD, thereby forming multiple straight line portions in the outer peripheral edge portion of magnet 90. The flat surface formed in second opposing surface 92 extends flatly in a direction perpendicular to radial direction RD.

[0210] The field annular portion 70 is fitted onto the magnet support portion 51. The outer peripheral end of the magnet support portion 51 is shaped to restrict displacement of the field annular portion 70 in the circumferential direction CD relative to the magnet support portion 51. The outer peripheral end of the magnet support portion 51 is shaped to hook onto an inner peripheral corner of the magnet 90. A corner is formed at the outer peripheral end of the magnet support portion 51, similar to the outer peripheral corner of the magnet 90 in the eighth embodiment. At the outer peripheral end of the magnet support portion 51, a corner is formed by two straight portions extending linearly in the circumferential direction CD. The corner of the magnet support portion 51 fits into an inner peripheral corner of the magnet 90. The corner of the magnet support portion 51 and the inner peripheral corner of the magnet 90 are hooked onto each other, restricting displacement of the field annular portion 70 in the circumferential direction CD relative to the magnet support portion 51.

[0211] In this embodiment, the linear portion formed on the outer peripheral edge of the magnet support portion 51 and the linear portion formed on the inner peripheral edge of the magnet 90 overlap each other. With this configuration, the annular inner peripheral surface 72 of the field annular portion 70 and the outer peripheral surface of the magnet support portion 51 can be brought into contact with each other at their flat surfaces. This allows a stable installation surface for installing the field annular portion 70 on the magnet support portion 51 as a back core. For example, the outer peripheral surface of the magnet support portion 51 can be brought into contact with each of the multiple magnet pieces 60 individually at their flat surfaces.

[0212] For example, unlike this embodiment, a configuration is assumed in which both the inner peripheral end of the field annular portion 70 and the outer peripheral end of the magnet support portion 51 extend in an arc shape in the circumferential direction CD. In this configuration, if the field annular portion 70 is misaligned in the radial direction RD relative to the magnet support portion 51, there is a concern that the inner peripheral end of the field annular portion 70 and the outer peripheral end of the magnet support portion 51 will come into point contact. An example of a case in which the field annular portion 70 is misaligned in the radial direction RD relative to the magnet support portion 51 is when the center of the field annular portion 70 is misaligned from the center of the magnet support portion 51.

[0213] Eleventh Embodiment In the tenth embodiment, a plurality of straight line portions are included in the inner peripheral edge portion of the magnet 90. In contrast, in the eleventh embodiment, only one straight line portion is included in the inner peripheral edge portion of the magnet 90.

[0214] As shown in Figure 26, the inner peripheral edge of magnet 90 includes only one straight line portion. This straight line portion extends linearly in the circumferential direction CD at the inner peripheral edge of magnet 90, spanning between first end face 93 and second end face 94. In this magnet 90, the entire second opposing surface 92 is a flat surface. In this magnet 90, the single flat surface formed on second opposing surface 92 spans between first end face 93 and second end face 94.

[0215] Twelfth Embodiment In the tenth embodiment, both the outer peripheral end and the inner peripheral end of the field annular portion 70 are formed to be circular in plan view. In contrast, in the twelfth embodiment, both the outer peripheral end and the inner peripheral end of the field annular portion 70 are not circular in plan view.

[0216] 27 , magnet 90 includes at least one straight section on both its outer and inner peripheral edges. For example, magnet 90 includes only one straight section on its outer peripheral edge and two straight sections on its inner peripheral edge. In this embodiment, magnet 90 and magnet support part 51 have a shape that combines the shape of magnet 90 in the ninth embodiment with the shape of magnet 90 and magnet support part 51 in the tenth embodiment.

[0217] <Thirteenth embodiment> In the first embodiment, the core end faces 103, 104 of the intermediate core 100 are not inclined toward the circumferential direction CD with respect to the first reference line Lr1. In contrast, in the thirteenth embodiment, the core end faces 103, 104 are inclined toward the circumferential direction CD with respect to the first reference line Lr1.

[0218] As shown in FIG. 28 , at the boundary between the magnet 90 and the intermediate core 100, the end faces 93, 94 and the core end faces 103, 104 are each inclined toward the circumferential direction CD with respect to the radial direction RD. The end faces 93, 94 are inclined toward the circumferential direction CD with respect to the first reference line Lr1 so as to face outward in the radial direction RD. In the magnet 90, the magnet angle α (see FIG. 7 ) gradually decreases from the second opposing surface 92 to the first opposing surface 91. That is, the magnet angle α gradually decreases from the side opposite the armature to the side facing the armature. In the magnet 90, the rate of change of the magnet angle α from the second opposing surface 92 to the first opposing surface 91 is constant. The rate of change of the magnet angle α is the ratio of the change in the magnet angle α to the length dimension of the end faces 93, 94 in the radial direction RD.

[0219] The core end faces 103, 104 are inclined toward the circumferential direction CD with respect to the first reference line Lr1 so as to face inward in the radial direction RD. In the interposed core 100, the core angle γ gradually increases from the second core opposing surface 102 to the first core opposing surface 101. That is, the core angle γ gradually increases from the side opposite the armature to the side opposite the armature. In the interposed core 100, the rate of change of the core angle γ from the second core opposing surface 102 to the first core opposing surface 101 is constant. For example, the core end faces 103, 104 extend straight and flat across the first opposing surface 91 and the second opposing surface 92 while inclining toward the circumferential direction CD with respect to the first reference line Lr1. The rate of change of the core angle γ is the ratio of the change in the core angle γ to the length of the end faces 103, 104 in the radial direction RD. The core angle γ is sometimes referred to as the open angle of the pseudo-pole portion.

[0220] For example, in the interposed core 100, the core angle γ1 at the second core facing surface 102 is smallest, and the core angle γ3 at the first core facing surface 101 is largest. Furthermore, in the interposed core 100, the core angle γ2 at a position between the first core facing surface 101 and the second core facing surface 102 is larger than the core angle γ1 but smaller than the core angle γ3.

[0221] In the field annular portion 70, the magnet 90 is caught on the intervening core 100 from the radially inner side. For example, the first core end face 103 is overlapped on the second end face 94 from the radially outer side. The second core end face 104 is overlapped on the first end face 93 from the radially outer side. Therefore, in the field annular portion 70, the intervening core 100 restricts the magnet 90 from displacing radially outward relative to the rotor core 50. Therefore, the pseudo-pole portion effectively restrains the motor magnet in the radial direction RD, and the intervening core 100 can prevent the magnet from scattering.

[0222] In the field annular portion 70, the length in the circumferential direction CD of the side of the intervening core 100 facing the magnet 90 increases from the second opposing surface 92 side toward the first opposing surface 91 side in the radial direction RD. The side of the intervening core 100 facing the magnet 90 is aligned with the magnet 90 in the radial direction RD. The side of the intervening core 100 facing the magnet 90 is the first core end face 103 or the second core end face 104. The change in the length in the circumferential direction CD of the side of the intervening core 100 facing the magnet 90, which increases from the second opposing surface 92 side toward the first opposing surface 91 side in the radial direction RD, is constant.

[0223] According to this embodiment, the length in the circumferential direction CD of the side of the intervening core 100 facing the magnet 90 increases from the second opposing surface 92 side toward the first opposing surface 91 side in the radial direction RD. This configuration can suppress magnetic flux short-circuiting on the armature-facing side of the intervening core 100. For example, it is possible to suppress the generation of magnetic flux MF that passes through both of two magnets 90 adjacent in the circumferential direction CD via the intervening core 100. Therefore, it is possible to increase effective magnetic flux such as the first magnetic flux MF1 and the second magnetic flux MF2.

[0224] According to this embodiment, the amount of change in the length in the circumferential direction CD of the side of the intermediate core 100 facing the magnet 90, which increases in the radial direction RD from the second opposing surface 92 side toward the first opposing surface 91 side, is constant. With this configuration, the radially outer corners and radially inner corners of the magnet 90 and the intermediate core 100 are less likely to become narrow. This makes it possible to suppress deformation of the magnet 90 and the intermediate core 100, such as deformation of the corners of the magnet 90 and the intermediate core 100.

[0225] <Fourteenth Embodiment> In the thirteenth embodiment, the core end faces 103 and 104 are flat surfaces that extend flatly, whereas in the fourteenth embodiment, the core end faces 103 and 104 are curved in the circumferential direction CD.

[0226] As shown in Figure 29, the end faces 93, 94 of the magnet 90 are curved so as to bulge in the circumferential direction CD. The end faces 93, 94 are curved so that the middle portions in the radial direction RD bulge. The first end face 93 bulges toward one side in the circumferential direction CD. The second end face 94 bulges toward the other side in the circumferential direction CD.

[0227] In magnet 90, end faces 93, 94 are curved so that magnetic angle α gradually decreases from second opposing surface 92 to first opposing surface 91. In magnet 90, the rate of change of magnetic angle α gradually increases from second opposing surface 92 to first opposing surface 91. For example, the rate of change of magnetic angle α continuously increases outward in radial direction RD. In magnet 90, the curve of end faces 93, 94 becomes sharper the closer they are to first opposing surface 91 in radial direction RD.

[0228] In the interposed core 100, the core end faces 103, 104 are curved so as to be concave in the circumferential direction CD. The core end faces 103, 104 are curved surfaces that are concave at their intermediate portions in the radial direction RD. The first core end face 103 is concave toward one side in the circumferential direction CD. The second core end face 104 is concave toward the other side in the circumferential direction CD.

[0229] In the intervening core 100, the core end faces 103, 104 are curved so that the core angle γ gradually decreases from the second core facing surface 102 to the first core facing surface 101. In the intervening core 100, the rate of change of the core angle γ gradually increases from the second core facing surface 102 to the first core facing surface 101. For example, the rate of change of the core angle γ continuously increases outward in the radial direction RD. In the intervening core 100, the curve of the core end faces 103, 104 becomes tighter the closer they are to the first core facing surface 101 in the radial direction RD.

[0230] According to this embodiment, the length of the magnet 90-side side of the interposed core 100 in the circumferential direction CD, which increases from the second opposing surface 92 side toward the first opposing surface 91 side in the radial direction RD, increases. This configuration increases the inflow area and outflow area of ​​the magnetic flux MF between the magnet 90 and the pseudo pole, thereby increasing the effective magnetic flux, such as the first magnetic flux MF1. For example, by curving the end faces 93, 94 and the core end faces 103, 104 in the circumferential direction CD, the areas of the end faces 93, 94 and the core end faces 103, 104 can be increased. This prevents the areas of the end faces 93, 94 and the core end faces 103, 104 from becoming insufficient for the amount of magnetic flux MF.

[0231] <Fifteenth embodiment> In the fourteenth embodiment, the curve of the core end faces 103, 104 becomes sharper toward the outside in the radial direction RD of the intervening core 100. In contrast, in the fifteenth embodiment, the curve of the core end faces 103, 104 becomes sharper toward the inside in the radial direction RD of the intervening core 100.

[0232] 30 , in magnet 90, the rate of change of magnet angle α gradually decreases from second opposing surface 92 to first opposing surface 91. For example, the rate of change of magnet angle α continuously decreases outward in radial direction RD. In magnet 90, the curve of end faces 93, 94 becomes gentler the closer to first opposing surface 91 in radial direction RD.

[0233] In the interposed core 100, the rate of change of the core angle γ gradually decreases from the second core facing surface 102 toward the first core facing surface 101. For example, the rate of change of the core angle γ continuously decreases toward the outside in the radial direction RD. In the interposed core 100, the curvature of the core end faces 103, 104 becomes gentler the closer they are to the first core facing surface 101 in the radial direction RD.

[0234] According to this embodiment, the change in the length in the circumferential direction CD of the side of the intervening core 100 facing the magnet 90, which increases in the radial direction RD from the second opposing surface 92 toward the first opposing surface 91, is reduced. With this configuration, as with the fourteenth embodiment, the inflow area and outflow area of ​​the magnetic flux MF between the magnet 90 and the pseudo pole are increased, thereby increasing the effective magnetic flux, such as the first magnetic flux MF1. Furthermore, with this configuration, the radially outer corners of the magnet 90 and the intervening core 100 are less likely to become narrow. This makes it possible to suppress deformation of the radially outer corners of the magnet 90 and the intervening core 100.

[0235] Sixteenth Embodiment In the fourteenth embodiment, the core end faces 103, 104 are curved so as to bulge toward one side in the circumferential direction CD. In contrast, in the sixteenth embodiment, the core end faces 103, 104 are formed in an uneven shape.

[0236] As shown in Figure 31, magnet 90 has end faces 93, 94 that are formed with an uneven shape. End faces 93, 94 have portions that curve so as to bulge in the circumferential direction CD and portions that curve so as to recess in the circumferential direction CD. Magnet 90 has portions where the magnet angle α gradually increases radially outward and portions where the magnet angle α gradually decreases radially outward.

[0237] The intervening core 100 has core end faces 103, 104 formed in an uneven shape. The core end faces 103, 104 are shaped to mesh with the end faces 93, 94 at the boundary between the magnet 90 and the intervening core 100. The core end faces 103, 104 have a portion that curves to bulge in the circumferential direction CD and a portion that curves to recess in the circumferential direction CD. The intervening core 100 has a portion where the core angle γ gradually increases radially outward and a portion where the core angle γ gradually decreases radially outward.

[0238] Seventeenth Embodiment In a seventeenth embodiment, the magnet 90 is attached to both the rotor core 50 and the intervening core 100 during the manufacturing process of the motor 10 .

[0239] In the manufacturing process of the rotor 40, the magnet 90 is attached to the rotor core 50. In this process, as shown in Figure 32, a worker inserts the magnet 90 from one side in the axial direction AD between two intermediate cores 100 that are adjacent in the circumferential direction CD. The worker then fixes the magnet 90 to the rotor core 50 and the intermediate cores 100 with an adhesive or the like.

[0240] In this embodiment, in the manufacturing process of the rotor 40, the magnet 90 is inserted between the two intermediate cores 100 from one side in the axial direction AD, which increases the degree of freedom regarding the shape of the magnet 90 and the shape of the intermediate core 100. For example, even in a configuration in which the intermediate core 100 is hooked onto the magnet 90 from the radially outer side, as in the fourteenth embodiment, it is possible to insert the magnet 90 between the two intermediate cores 100 from one side in the axial direction AD.

[0241] Eighteenth Embodiment In an eighteenth embodiment, in the manufacturing process of the motor 10, manufacturing of the magnet 90 and attachment of the magnet 90 to the rotor core 50 are performed simultaneously.

[0242] In this embodiment, the magnet 90 is formed from a plurality of magnet members. For example, similar to the seventh embodiment, the magnet 90 is formed to include a plurality of magnet pieces 60. In the manufacturing process of the rotor 40, similar to the seventeenth embodiment, as shown in FIG. 33 , a worker inserts the magnet piece 60 from one side in the axial direction AD between two intervening cores 100 adjacent in the circumferential direction CD. Then, the worker fixes the magnet piece 60 to the rotor core 50 with an adhesive or the like. In this way, the worker simultaneously performs the work of installing the plurality of magnet pieces 60 between the two intervening cores 100 and the work of manufacturing the magnet 90 from the plurality of magnet pieces 60.

[0243] As long as the magnet 90 can be placed in the inter-core gap, the worker can place it in any way. For example, the worker can process the magnet 90 into the desired shape and then fit the magnet 90 into the inter-core gap. This method can be applied to sintered magnets and can increase magnetic flux. The worker can also insert-molde the magnet 90 into the inter-core gap. This method can be applied to magnetic resin and can form the magnet 90 into a complex shape.

[0244] Nineteenth Embodiment In the first embodiment, the motor 10 is a radial gap inner rotor type motor, whereas in the nineteenth embodiment, the motor 10 is a radial gap outer rotor type motor.

[0245] As shown in Figure 34, in the motor 10 of this embodiment, the rotor 40 is provided on the outer peripheral side of the stator 30. A motor 10 in which the rotor 40 is provided on the outer peripheral side of the stator 30 is sometimes referred to as an outer rotor type motor. A rotor 40 provided on the outer peripheral side of the stator 30 is sometimes referred to as an outer rotor. In this embodiment, a field element such as the rotor 40 is provided on the outer peripheral side of an exciter such as the stator 30. The housing 11 and the shaft 12 are not shown in Figure 34.

[0246] In the rotor 40, the field annular portion 70, the magnet 90, and the intervening core 100 are provided on the inner circumferential side of the rotor core 50. The field annular portion 70, the magnet 90, and the intervening core 100 are provided on the outer circumferential side of the stator 30. In the magnet 90, a first surface such as a first opposing surface 91 faces the inner circumferential side, and a second surface such as a second opposing surface 92 faces the outer circumferential side.

[0247] Twentieth Embodiment In the first embodiment, the stator 30 is an exciter and the rotor 40 is a field element. In contrast to this, in the twentieth embodiment, the rotor 40 is an exciter and the stator 30 is a field element.

[0248] As shown in Figure 35, in the motor 10 of this embodiment, the stator 30 has a rotor core 50, magnet pieces 60, a field annular portion 70, a magnet 90, and an intervening core 100. The rotor 40 has a stator core 31 and a coil 35. The rotor 40 is excited by passing current through the coil 35. In this embodiment, the rotor 40, which is an exciter, is provided on the inner periphery of the stator 30, which is a field element. The motor 10 is an inner rotor type motor. For example, the motor 10 is a brushed motor. In the motor 10, the rotor core 50, the magnet 90, and the intervening core 100 are fixed to the housing 11.

[0249] According to the present embodiment, the magnet 90 is provided in the stator 30 as a field element. In this configuration, as described above, the magnetic flux MF is less likely to leak from the second opposing surface 92 of the magnet 90, which makes it possible to prevent the magnetic flux MF from leaking to the outside from the rotor 40 in the radial direction RD.

[0250] The motor 10 may be an outer rotor type motor. For example, the stator 30, which is a field element, may be provided on the inner circumferential side of the rotor 40, which is an exciter.

[0251] Twenty-first embodiment In the first embodiment, the motor 10 is a radial motor, whereas in the twenty-first embodiment, the motor is an axial motor.

[0252] The motor 110 shown in FIG. 36 is an axial gap motor. An axial gap motor is sometimes called an axial motor. The motor 110 is sometimes called a rotary motor. In the motor 110, a stator 130 and a rotor 140 are aligned in the axial direction AD along a shaft 112. The motor 110 has an axial gap 120. The axial gap 120 is a gap between the stator 130 and the rotor 140. The axial gap 120 extends in a direction perpendicular to the axial direction AD. The stator 130 and the rotor 140 are aligned in the axial direction AD via the axial gap 120.

[0253] In this embodiment, the motor 110, shaft 112, stator 130, and rotor 140 are configured to correspond to the motor 10, shaft 12, stator 30, and rotor 40 of the first embodiment. The motor 110 of this embodiment differs significantly from the motor 10 of the first embodiment in that the stator 130 and rotor 140 are aligned in the axial direction AD. In this embodiment, the stator 130 corresponds to the exciter, and the rotor 140 corresponds to the field element. The shaft 112 corresponds to the rotation axis. The circumferential direction CD is the direction around the rotation axis.

[0254] 37 and 38 , in the magnet 90, the first annular surface 73 faces the stator 130 across the axial gap 120. The second annular surface 74 faces the opposite side from the stator 130. In the magnet 90, the first opposing surface 91 faces the stator 130 across the axial gap 120. The first opposing surface 91 is included in the first annular surface 73. In addition, the second opposing surface 92 faces the opposite side from the stator 130 in the axial direction AD.

[0255] As shown in Figure 38, in the magnet 90, the first opposing surface 91 and the second opposing surface 92 are aligned in the axial direction AD. The first end surface 93 and the second end surface 94 are aligned in the circumferential direction CD. In the magnet 90, at least a portion of the orientation OR is inclined toward the circumferential direction CD with respect to the axial direction AD. In this embodiment, the axial direction AD corresponds to the first direction, and the circumferential direction CD corresponds to the second direction. The orientation of the orientation OR relative to the first and second directions is the same as in the first embodiment.

[0256] In the interposed core 100, the first core facing surface 101 and the second core facing surface 102 are aligned in the axial direction AD. The first core end face 103 and the second core end face 104 are aligned in the circumferential direction CD.

[0257] In the magnet 90, the orientation OR as a whole faces the circumferential direction CD. In the magnet 90, the orientation OR is not inclined toward the radial direction RD with respect to the circumferential direction CD. For example, in the magnet piece 60, all of the orientations OR extend in a direction perpendicular to a single third reference line Lr3 that passes through the magnet piece 60. The radial direction RD corresponds to the third direction. The third reference line Lr3 is a reference line that extends in the third direction. For example, the third reference line Lr3 is a virtual line that passes through the motor axis Cm and extends linearly in the radial direction RD.

[0258] According to this embodiment, the magnet 90 is provided in an axial motor. In the axial motor, the first opposing surface 91 and the second opposing surface 92 are aligned in the axial direction AD along the shaft 112. The first end surface 93 and the second end surface 94 are aligned in the circumferential direction CD. With this configuration, an increase in the mass of the magnet 90 on the second opposing surface 92 side can be suppressed in the axial motor.

[0259] An axial motor may be provided with a plurality of stators 130 and rotors 140. For example, in the motor 110, two rotors 140 may be arranged side by side in the axial direction AD with the stator 130 interposed therebetween. This motor 110 is sometimes referred to as a double-rotor motor. Also, two stators 130 may be arranged side by side in the axial direction AD with the rotor 140 interposed therebetween. This motor 110 is sometimes referred to as a double-stator motor.

[0260] Twenty-Second Embodiment In the first embodiment, the motor 10 is a rotary motor, whereas in the twenty-second embodiment, the motor is a linear motor.

[0261] The motor 210 shown in Figure 39 is a linear motor that performs linear motion. In the motor 210, a stator 230 and a mover 240 are aligned in the radial direction RD. The mover 240 and a shaft 212 are movable in the axial direction AD relative to the stator 230. The mover 240 is provided on the shaft 212. The shaft 212 moves linearly in the axial direction AD. The motor 210 has a linear gap 220. The linear gap 220 is a gap between the stator 230 and the mover 240. The linear gap 220 extends in a direction perpendicular to the radial direction RD. The stator 230 and the mover 240 are aligned in the radial direction RD via the linear gap 220.

[0262] A plurality of magnets 90 and intervening cores 100 are arranged in a straight line along the axial direction AD. In the mover 240, the magnet support portion 51 and the field assembly extend along the axial direction AD. The field assembly is a region of the mover 240 that corresponds to the field annular portion 70 of the first embodiment. The field assembly is formed to include a plurality of magnets 90 and a plurality of intervening cores 100. In the field assembly, the plurality of magnets 90 and the plurality of intervening cores 100 are integrated. For example, in the field assembly, the plurality of magnets 90 and the plurality of intervening cores 100 are connected by the magnet support portion 51 or the like.

[0263] In this embodiment, the motor 210, shaft 212, stator 230, and mover 240 are configured to correspond to the motor 10, shaft 12, stator 30, and rotor 40 of the first embodiment. The motor 210 of this embodiment differs significantly from the motor 10 of the first embodiment in that the mover 240 moves in the axial direction AD relative to the stator 230. In this embodiment, the stator 230 corresponds to the exciter, and the mover 240 corresponds to the field element. The shaft 212 corresponds to the linear motion axis. The axial direction AD is the direction along the linear motion axis.

[0264] 40 , in the stator 230, multiple core teeth 32 and coils 35 are arranged in the axial direction AD. In the mover 240, multiple magnets 90 and intervening cores 100 are arranged in the axial direction AD. In the magnet 90, a first opposing surface 91 faces the stator 230 across a linear gap 220. A second opposing surface 92 faces the opposite side from the stator 230 in the radial direction RD.

[0265] In the magnet 90, the first opposing surface 91 and the second opposing surface 92 are aligned in the radial direction RD. The first end surface 93 and the second end surface 94 are aligned in the axial direction AD. In the magnet 90, at least a portion of the orientation OR is inclined toward the axial direction AD with respect to the radial direction RD. In this embodiment, the radial direction RD corresponds to the first direction, and the axial direction AD corresponds to the second direction. The orientation of the orientation OR with respect to the first direction and the second direction is the same as in the first embodiment.

[0266] In the interposed core 100, the first core facing surface 101 and the second core facing surface 102 are aligned in the radial direction RD. The first core end face 103 and the second core end face 104 are aligned in the axial direction AD.

[0267] In the magnet 90, the orientation OR is generally oriented in the axial direction AD. In the magnet 90, the orientation OR is not inclined toward the circumferential direction CD with respect to the axial direction AD. In this embodiment, the circumferential direction CD corresponds to the third direction.

[0268] According to this embodiment, the magnet 90 is provided in a linear motor. In the linear motor, the first opposing surface 91 and the second opposing surface 92 are aligned in the radial direction RD. Furthermore, the first end surface 93 and the second end surface 94 are aligned in the axial direction AD. With this configuration, an increase in magnetic flux MF on the second opposing surface 92 side of the magnet 90 can be suppressed in the linear motor.

[0269] In addition, in a linear motor, the arrangement direction of the stator 230 and the mover 240 does not have to be the radial direction RD. For example, a configuration in which the stator 230 and the mover 240 are arranged in the Y direction, and the mover 240 moves in the X direction relative to the stator 230, is also possible. In this configuration, if the depth direction of the stator 230 and the mover 240 is defined as the Z direction, the X direction, the Y direction, and the Z direction are perpendicular to each other. In this configuration, the Y direction corresponds to the first direction, and the X direction corresponds to the second direction. Furthermore, in this configuration, the stator 230 does not have to be formed in an annular shape. A plurality of stators 230 and movers 240 may be arranged in the X direction or the Z direction.

[0270] <Other Embodiments> The disclosure of this specification is not limited to the exemplified embodiments. The disclosure encompasses the exemplified embodiments and modifications thereto by those skilled in the art. For example, the disclosure is not limited to the combinations of parts and elements shown in the embodiments, and can be implemented in various modifications. The disclosure can be implemented in various combinations. The disclosure can have additional parts that can be added to the embodiments. The disclosure encompasses the omission of parts and elements from the embodiments. The disclosure encompasses the substitution or combination of parts and elements between one embodiment and another embodiment. The disclosed technical scope is not limited to the description of the embodiments. The disclosed technical scope is defined by the claims, and should be interpreted as including all modifications within the meaning and scope equivalent to the claims.

[0271] In each embodiment, the orientation of the orientation OR in the magnet 90 may be set in any manner as long as the second orientation component ORb is larger on the second opposing surface 92 side than on the first opposing surface 91 side and larger on the end surface 93, 94 side than on the vertical center portion 97 side. For example, the orientation OR may be set so that it is a gradually varying orientation in at least one of the multiple opposing parallel portions 98. Furthermore, the orientation OR may be set so that it is a gradually varying orientation in at least one of the multiple end surface parallel portions 99. Furthermore, the orientation OR may be set in at least two stages in each of the first direction and the second direction. Additionally, the gradually varying orientation may be adopted in at least one of the first direction and the second direction in the magnet 90.

[0272] In each embodiment, the magnitude of the orientations OR may not be the same for all orientations OR. For example, one of two orientations OR may be larger than the other orientation OR. In one orientation OR, both the first orientation component ORa and the second orientation component ORb may be larger than either the first orientation component ORa or the second orientation component ORb in the other orientation OR.

[0273] In each embodiment, the magnet 90 serving as a motor magnet may have any shape. For example, in the first embodiment, the first opposing surface 91 and the second opposing surface 92 do not have to extend in a direction perpendicular to the radial direction RD. For example, the first opposing surface 91 and the second opposing surface 92 may be inclined with respect to the radial direction RD so as to face one side in the circumferential direction CD or one side in the axial direction AD. Furthermore, the first end surface 93 and the second end surface 94 do not have to extend in a direction perpendicular to the circumferential direction CD. For example, the first end surface 93 and the second end surface 94 may be inclined with respect to the circumferential direction CD so as to face one side in the radial direction RD or one side in the axial direction AD. Furthermore, the first side surface 95 and the second side surface 96 do not have to extend in a direction perpendicular to the axial direction AD.

[0274] In each embodiment, the rotor core 50 does not have to form a back core for the magnet 90. For example, the back core may be provided for the magnet 90 as a separate member from the rotor core 50. In this configuration, the rotor core 50 does not have to be made of a soft magnetic material. Also, a back core does not have to be provided for the magnet 90.

[0275] In each embodiment, motor magnets such as magnet 90 may be provided in the stator, rotor, or mover, regardless of the type of motor, as long as they are included in the field magnet of the motor.

[0276] In each embodiment, the intermediate core 100 may be formed of at least one core member. For example, the intermediate core 100 may be formed to include a plurality of core members.

[0277] In each embodiment, the interposed core 100 may have any shape. For example, in the first embodiment, the first core facing surface 101 and the second core facing surface 102 do not have to extend in a direction perpendicular to the radial direction RD. The first core facing surface 101 and the second core facing surface 102 may be inclined with respect to the radial direction RD so as to face one side in the circumferential direction CD or one side in the axial direction AD. Furthermore, the first core end face 103 and the second core end face 104 do not have to extend in a direction perpendicular to the circumferential direction CD. For example, the first core end face 103 and the second core end face 104 may be inclined with respect to the circumferential direction CD so as to face one side in the radial direction RD or one side in the axial direction AD. Furthermore, the first core face 105 and the second core face 106 do not have to extend in a direction perpendicular to the axial direction AD.

[0278] In each embodiment, the intervening core 100 may be provided in a stator, rotor, or mover, regardless of the type of motor, as long as it is included in the field core of the motor. Furthermore, the intervening core 100 may be a component in the rotor core 50 that is independent of the magnet support portion 51. For example, the intervening core 100 may be fixed to the magnet support portion 51 by welding or the like. Furthermore, the intervening core 100 does not have to be included in the rotor core 50. In this configuration, the intervening core 100 is fixed to the rotor core 50 together with the magnet 90.

[0279] In each embodiment, the first direction and the second direction do not have to be orthogonal as long as they intersect with each other. For example, in the first embodiment, the radial direction RD, which is the first direction, and the circumferential direction CD, which is the second direction, do not have to be orthogonal as long as they intersect with each other. In the fifteenth embodiment, the radial direction RD or the Y direction, which is the first direction, and the axial direction AD or the X direction, which is the second direction, do not have to be orthogonal as long as they intersect with each other.

[0280] In each embodiment, the magnetic powder and other materials contained in the motor magnet, such as magnet 90, can be appropriately selected as long as they satisfy the performance of the motor magnet. The motor magnet will have characteristics resulting from the combination of the selected magnetic powder and other materials. A motor magnet with such characteristics is used in a motor. Note that materials other than the magnetic powder do not necessarily need to be included in the motor magnet.

[0281] The magnetic powder may be a rare earth magnetic powder containing a rare earth as a component, or a rare earth-free magnetic powder containing no rare earth as a component. The magnetic powder may contain at least one type of rare earth magnetic powder. The magnetic powder may contain at least one type of rare earth-free magnetic powder. The magnetic powder may contain at least one type of rare earth magnetic powder and at least one type of rare earth-free magnetic powder.

[0282] If the motor magnet requires at least one of small size and light weight and ease of modification, then a finer particle size of the magnetic powder is preferable. The particle size of the magnetic powder can be either micro- or nano-scale. If ease of material procurement is required, then it is desirable that the magnetic powder has simple and abundant components and does not contain rare earth elements. If it is required to withstand use under harsh conditions, then it is desirable that the magnetic powder has high heat resistance, radiation resistance, etc.

[0283] Motor magnets containing magnetic powders with the above-mentioned properties, such as nanoscale, simple and abundant components, rare earth-free, high heat resistance, and radiation resistance, are expected to generally have the properties of such magnetic powders. Therefore, motor magnets containing such magnetic powders are expected to have properties such as small size and light weight, easy improvement, easy material procurement, high recycling efficiency, high heat resistance, and radiation resistance. Such motor magnets can be widely adopted in motors in general. At the same time, such motor magnets can also be adopted in motors in certain small-scale technical fields where these properties are required.

[0284] Of course, motor magnets used in motors are required to produce output appropriate for their intended use. The magnetic powder contained in the motor magnet can be any magnetic powder expected to produce the output appropriate for the intended use. Examples of magnets include ceramic magnets such as ferrite magnets, metal magnets such as rare earth magnets and ordered alloy magnets, and bonded magnets such as rubber magnets and plastic magnets. Ferrites include hexagonal ferrites such as barium ferrite and strontium ferrite, and spinel ferrites such as cobalt ferrite. Rare earths include R-T systems such as Sm-Co, R-T-B systems such as Nd-Fe-B, and R-T-N systems such as Sm-Fe-N. Ordered alloys include L10-FePt, L10-FeNi, and τ-MnAl. Other metal magnet materials include spinodal decomposition systems such as alnico and Fe-Cr-Co, and Fe16N2. The above R stands for rare earth, which includes Nd, Sm, Dy, etc. The T stands for transition metal, which includes Fe, Co, Ni, etc.

[0285] In each embodiment, the motor magnet, field element, and various devices in which the motor is installed are not particularly limited. In other words, the application of the motor employing the motor magnet is not particularly limited. The motor can be used for consumer, commercial, industrial, medical, and other purposes. For example, the motor can be used in mobility products that move people and objects, robotic products involved in the production and control of objects, and equipment that generates energy such as electricity. In addition, even if not specifically exemplified, the motor magnet can be widely and generally applied to any device that includes a motor.

[0286] Mobility products include cars for land transportation, aircraft for air transportation, ships for water transportation, submarines and submersibles for underwater transportation, and spacecraft for space travel.

[0287] These means of transportation on land, air, water, and space include manned and unmanned aircraft. Vehicles include manned and unmanned automobiles. Specifically for transporting goods, vehicles include manned and unmanned guided vehicles. Unmanned guided vehicles are sometimes called AGVs. AGV is an abbreviation for Automated Guided Vehicle. Aircraft include manned and unmanned aircraft. Unmanned aircraft are sometimes called UAVs. UAV is an abbreviation for Unmanned Aerial Vehicle. Specifically for transporting goods, ships include manned and unmanned ships. Submarines and submarines include manned and unmanned submersibles. Spacecraft include manned and unmanned spacecraft. Manned spacecraft are sometimes called spaceships.

[0288] The power source of these vehicles, including manned and unmanned vehicles, may be various types of energy, such as thermal energy, electrical energy, light energy, renewable energy, chemical energy, nuclear energy, etc. One or a combination of these various types of energy may be used as the power source of the vehicle.

[0289] Robot products, when classified by use, include industrial robots, industrial robots, domestic robots, service robots, medical robots, educational robots, agricultural robots, exploration robots, and leisure robots.

[0290] An example of a facility that generates energy is a power plant, which produces electrical energy using energy sources such as oil, coal, natural gas, biomass, nuclear power, wind power, hydroelectric power, geothermal power, solar power, and chemical reactions.

[0291] (Disclosure of Technical Ideas) This specification discloses multiple technical ideas described in the following multiple clauses. Some clauses may be described in a multiple dependent form, with the subsequent clause alternatively referring to the preceding clause. Furthermore, some clauses may be described in a multiple dependent form, with the subsequent clause referring to another multiple dependent clause. These multiple dependent clauses define multiple technical ideas.

[0292] (Technical Idea 1) A motor component (40; 140; 240) comprising a plurality of motor magnets (90) aligned in a second direction (CD; CD; AD) intersecting a first direction (RD; AD; RD), and an intervening portion (100) including a soft magnetic material and provided between two of the motor magnets aligned adjacent to each other in the second direction, wherein the motor magnets have: a first surface (91) and a second surface (92) aligned in the first direction; a first end portion (93) and a second end portion (94) aligned in the second direction; and a plurality of orientations (OR) distributed between the first surface and the second surface and between the first end portion and the second end portion, at least a portion of the plurality of orientations having a first orientation component (ORa) aligned along the first direction and a second orientation component (ORb) aligned along the second direction, A motor component in which the first orientation component extends from one of the first surface and the second surface to the other in the first direction, is smaller on the second surface side than on the first surface side in the first direction, and is smaller on the first end side and the second end side than on the central portion (97) between the first end and the second end side in the second direction; the second orientation component is larger on the second surface side than on the first surface side in the first direction, and is larger on the first end side and the second end side than on the central portion (97) between the first end and the second end side in the second direction; and the second orientation component is in opposite directions between the central portion and the first end and between the central portion and the second end.

[0293] (Technical Concept 2) The motor component according to Technical Concept 1, wherein the second orientation component gradually increases in the second direction from the central portion toward the first end portion and the second end portion.

[0294] (Technical Concept 3) The motor component according to Technical Concept 1 or 2, wherein the second orientation component gradually increases in the first direction from the first surface side toward the second surface side.

[0295] (Technical Idea 4) A motor component according to any one of Technical Ideas 1 to 3, wherein the first orientation component gradually becomes smaller in the second direction from the central portion side toward the first end portion side and the second end portion side, respectively.

[0296] (Technical Concept 5) The motor component according to any one of Technical Concepts 1 to 4, wherein the first orientation component gradually decreases in the first direction from the first surface side toward the second surface side.

[0297] (Technical Idea 6) A motor component according to any one of Technical Ideas 1 to 5, wherein the angle obtained by converting the length of one of the motor magnets in the second direction into an electrical angle is equal to or greater than an angle equivalent to an electrical angle of 180° in the second direction.

[0298] (Technical Idea 7) A motor component according to any one of Technical Ideas 1 to 6, wherein the length in the second direction of the side portion (103, 104) of the interposed portion on the motor magnet side increases from the second surface side toward the first surface side in the first direction, and the side portion is aligned with the motor magnet in the first direction.

[0299] (Technical Idea 8) A motor component according to Technical Idea 7, wherein the amount of change in the length of the side portion in the second direction, which increases from the second surface side toward the first surface side in the first direction, is constant, decreases, or increases.

[0300] (Technical Idea 9) A motor component according to any one of Technical Ideas 1 to 8, having a support portion (51) including a soft magnetic material, wherein the second surface side of the motor magnet faces the support portion, and the motor magnet is provided on the support portion.

[0301] (Technical Idea 10) A motor component according to any one of Technical Ideas 1 to 9, wherein the motor magnet is a first motor magnet (90S) having a plurality of orientations with the first orientation component directed from the first surface to the second surface in the first direction, or a second motor magnet (90N) having a plurality of orientations with the first orientation component directed from the second surface to the first surface in the first direction.

[0302] (Technical Idea 11) A motor (10; 110; 210) comprising an exciter (30; 130; 230) that is excited when current is applied, and a field element (40; 140; 240) that is aligned with the exciter in a first direction (RD; AD; RD) and moves relatively to the exciter in a second direction (CD; CD; AD) that intersects with the first direction, wherein the field element comprises a plurality of motor magnets (90) aligned in the second direction, and an intervening portion (100) that is provided between two of the motor magnets that are aligned adjacent to each other in the second direction and that forms a magnetic path through which magnetic flux passes, and wherein the motor magnet has: a first surface (91) and a second surface (92) aligned in the first direction; a first end (93) and a second end (94) aligned in the second direction; a plurality of orientations (OR) distributed between the first surface and the second surface and between the first end and the second end, at least some of the plurality of orientations having a first orientation component (ORa) along the first direction and a second orientation component (ORb) along the second direction, the first orientation component extending from one of the first surface and the second surface to the other in the first direction, being smaller on the second surface side than on the first surface side in the first direction, and being smaller on each of the first end side and the second end side than on a central portion (97) between the first end and the second end in the second direction, the second orientation component being larger on the second surface side than on the first surface side in the first direction, and being larger on each of the first end side and the second end side than on a central portion (97) between the first end and the second end in the second direction, the second orientation component being opposite between the central portion and the first end and between the central portion and the second end.

[0303] (Technical Concept 12) The motor according to Technical Concept 11, further comprising a support portion (51) including a soft magnetic material, wherein the second surface side of the motor magnet faces the support portion, and the motor magnet is provided on the support portion.

[0304] (Technical Idea 13) A motor according to Technical Idea 11 or 12, wherein the first direction is a radial direction (RD) perpendicular to a rotation axis (12) on which the field element is provided, and the second direction is a circumferential direction (CD) around the rotation axis.

[0305] (Technical Idea 14) A motor according to Technical Idea 11 or 12, wherein the first direction is an axial direction (AD) along a rotation axis (112) on which the field element is provided, and the second direction is a circumferential direction (CD) around the rotation axis.

[0306] (Technical Idea 15) A motor according to Technical Idea 11 or 12, wherein the first direction is a direction (RD) perpendicular to a linear motion axis (212) on which the field element is provided, and the second direction is an axial direction (AD) along the linear motion axis.

Claims

1. A motor component (40; 140; 240) comprising a plurality of motor magnets (90) aligned in a second direction (CD; CD; AD) intersecting a first direction (RD; AD; RD), and an intervening portion (100) including a soft magnetic material and provided between two adjacent motor magnets aligned in the second direction, wherein the motor magnets have: a first surface (91) and a second surface (92) aligned in the first direction; a first end (93) and a second end (94) aligned in the second direction; and a plurality of orientations (OR) distributed between the first surface and the second surface and between the first end and the second end, wherein at least a portion of the plurality of orientations has a first orientation component (ORa) along the first direction and a second orientation component (ORb) along the second direction, A motor component in which the first orientation component extends from one of the first surface and the second surface to the other in the first direction, is smaller on the second surface side than on the first surface side in the first direction, and is smaller on the first end side and the second end side than on the central portion (97) between the first end and the second end side in the second direction; the second orientation component is larger on the second surface side than on the first surface side in the first direction, and is larger on the first end side and the second end side than on the central portion (97) between the first end and the second end side in the second direction; and the second orientation component is in opposite directions between the central portion and the first end and between the central portion and the second end.

2. The motor component according to claim 1, wherein the second orientation component gradually increases in the second direction from the central portion toward the first end portion and the second end portion.

3. A motor component according to claim 1 or 2, wherein the second orientation component gradually increases in the first direction from the first surface side toward the second surface side.

4. A motor component according to claim 1 or 2, wherein the first orientation component gradually decreases in the second direction from the central portion toward the first end portion and the second end portion.

5. A motor component according to claim 1 or 2, wherein the first orientation component gradually decreases in the first direction from the first surface side toward the second surface side.

6. A motor component according to claim 1 or 2, wherein the angle obtained by converting the length of one of the motor magnets in the second direction into an electrical angle is equal to or greater than an angle equivalent to an electrical angle of 180° in the second direction.

7. A motor component as described in claim 1 or 2, wherein the length in the second direction of the side portion (103, 104) of the interposed portion on the motor magnet side increases from the second surface side toward the first surface side in the first direction, and the side portion is aligned with the motor magnet in the first direction.

8. A motor component as described in claim 7, wherein the amount of change in the length of the side portion in the second direction, which increases from the second surface side toward the first surface side in the first direction, is constant, decreases, or increases.

9. A motor component according to claim 1 or 2, which has a support portion (51) containing a soft magnetic material, wherein the second surface side of the motor magnet faces the support portion, and the motor magnet is provided on the support portion.

10. A motor component as described in claim 1 or 2, wherein the motor magnet is a first motor magnet (90S) having a plurality of orientations with the first orientation component directed from the first surface to the second surface in the first direction, or a second motor magnet (90N) having a plurality of orientations with the first orientation component directed from the second surface to the first surface in the first direction.

11. A motor (10; 110; 210) comprising an exciter (30; 130; 230) that is excited when current is applied, and a field element (40; 140; 240) that is aligned with the exciter in a first direction (RD; AD; RD) and moves relative to the exciter in a second direction (CD; CD; AD) that intersects the first direction, wherein the field element comprises a plurality of motor magnets (90) aligned in the second direction, and an intervening portion (100) that is provided between two adjacent motor magnets aligned in the second direction and forms a magnetic path through magnetic flux, and the motor magnet comprises: a first surface (91) and a second surface (92) aligned in the first direction, a first end (93) and a second end (94) aligned in the second direction, and a plurality of orientations (OR) distributed between the first surface and the second surface and between the first end and the second end, At least some of the multiple orientations have a first orientation component (ORa) along the first direction and a second orientation component (ORb) along the second direction, the first orientation component extending from one of the first surface and the second surface to the other in the first direction, being smaller on the second surface side than on the first surface side in the first direction, and being smaller on the first end side and the second end side than on a central portion (97) between the first end and the second end in the second direction, the second orientation component being larger on the second surface side than on the first surface side in the first direction, and being larger on the first end side and the second end side than on a central portion (97) between the first end and the second end in the second direction, and the second orientation component being opposite between the central portion and the first end and between the central portion and the second end.

12. The motor according to claim 11, further comprising a support portion (51) made of a soft magnetic material, wherein the second surface side of the motor magnet faces the support portion, and the motor magnet is provided on the support portion.

13. A motor according to claim 11 or 12, wherein the first direction is a radial direction (RD) perpendicular to a rotation axis (12) on which the field element is provided, and the second direction is a circumferential direction (CD) around the rotation axis.

14. A motor according to claim 11 or 12, wherein the first direction is an axial direction (AD) along a rotation axis (112) on which the field element is provided, and the second direction is a circumferential direction (CD) around the rotation axis.

15. A motor according to claim 11 or 12, wherein the first direction is a direction (RD) perpendicular to a linear motion axis (212) along which the field element is provided, and the second direction is an axial direction (AD) along the linear motion axis.

Images