Stator and motor

Abstract

A stator (20A) is provided with: a stator core (30A) comprising a molded body of magnetic powder, the stator core (30A) having an annular yoke (31) extending in the circumferential direction and teeth (32) protruding from the inner circumferential surface of the yoke (31) in the radial direction of the yoke (31); a coil (40A) comprising a winding (41) wound around the teeth (32); and a terminal plate (50A) fixed to an end surface (31a) of the yoke (31) in the axial direction of the stator core (30A), the terminal plate (50A) having a plate portion (51) and a terminal portion (52a) fixed to the plate portion (51), the plate portion (51) having, in the axial direction, a first main surface (51a) located on the end surface (31a) side of the yoke (31) and a second main surface (51b) located on the opposite side of the yoke (31) from the end surface (31a), the terminal portion (52a) protruding in the axial direction from at least the second main surface (51b) of the plate portion (51), and the terminal portion (52a) being fixed to the plate portion (51). One end portion (41a) of the winding (41) is fixed in a state of being wound around the terminal portion (52a).

Description

Technical Field

[0001] The present invention relates to a stator and a motor. Background Art

[0002] Patent document 1 discloses an electric motor comprising: a rotor having a plurality of magnetic poles separated in a circumferential direction, and a stator surrounding the rotor, the stator including an annular stator core formed by molding magnetic powder, the stator core having an annular yoke, and a plurality of teeth protruding toward the inner circumference of the yoke and separated from each other by narrow slots in the circumferential direction of the yoke, and slots for coil winding are provided at both axial ends of the stator core corresponding to each tooth.

[0003] Patent Document 1: Japanese Patent Application Publication No. 2008-61408

[0004] In the electric motor described in Patent Document 1, a bus bar is used to lead out the coil electricity. Figure 4 As shown in the patent document 1, the busbar connected to the coil is fixed to the stator core by threaded fastening. However, when the busbar is fixed to the stator core by threaded fastening, after the stator core is manufactured, additional processing is required to form threaded holes in the stator core, thereby reducing the manufacturing efficiency. In addition, since the stator core is damaged when the threaded holes are formed, the strength of the stator core is reduced. Thus, in the electric motor described in patent document 1, there is room for improvement in achieving the electrical extraction of the coil while suppressing the reduction in manufacturing efficiency and strength. Summary of the invention

[0005] The present invention has been made to solve the above-mentioned problems, and an object thereof is to provide a stator capable of realizing electric derivation of a coil while suppressing a decrease in manufacturing efficiency and strength. Another object of the present invention is to provide a motor having the above-mentioned stator.

[0006] The stator of the present invention is characterized in that it comprises: a stator core, having an annular yoke along a circumferential direction and teeth protruding radially from the inner circumferential surface of the yoke toward the yoke, and composed of a molded body of magnetic powder; a coil, composed of a winding wound on the teeth; and a terminal plate, fixed to the end face of the yoke in the axial direction of the stator core, the terminal plate having a plate portion and a terminal portion fixed to the plate portion, the plate portion having a first main surface located on the end face side of the yoke in the axial direction, and a second main surface located on the opposite side of the yoke to the end face, the terminal portion protruding from at least the second main surface of the plate portion toward the axial direction, and one end of the winding being fixed in a state wound around the terminal portion.

[0007] A motor according to the present invention is characterized by comprising the stator according to the present invention and a rotor provided so as to face the inner peripheral surface of the stator.

[0008] According to the present invention, it is possible to provide a stator that can realize electrical extraction of a coil while suppressing a decrease in manufacturing efficiency and strength. In addition, according to the present invention, it is possible to provide a motor having the above-mentioned stator. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is a schematic perspective view showing an example of a stator according to Embodiment 1 of the present invention.

[0010] Figure 2 Yes means Figure 1 A three-dimensional schematic diagram of the coil unit in FIG.

[0011] Figure 3 Yes means Figure 2 A three-dimensional schematic diagram of the split iron core in FIG.

[0012] Figure 4 Yes means Figure 2 A three-dimensional schematic diagram of an example of a state in which the split iron core and the terminal plate are disassembled.

[0013] Figure 5 This is a schematic perspective view showing an example of a coil unit constituting a stator according to Modification 1 of Embodiment 1 of the present invention.

[0014] Figure 6 Yes means Figure 5 A three-dimensional schematic diagram of an example of a state in which the split iron core and the terminal plate are disassembled.

[0015] Figure 7 It is a schematic perspective view showing an example of a coil unit constituting a stator according to a second modification of the first embodiment of the present invention.

[0016] Figure 8 Yes means Figure 7 A three-dimensional schematic diagram of an example of a state in which the split iron core and the terminal plate are disassembled.

[0017] Fig. 9 It is a schematic perspective view showing an example of a coil unit constituting a stator according to a third modification of the first embodiment of the present invention.

[0018] Fig.10 Yes means Fig. 9 A three-dimensional schematic diagram of the split iron core and the terminal board after being disassembled.

[0019] Fig.11 It is a perspective schematic diagram showing an example of a coil unit constituting a stator according to Embodiment 2 of the present invention.

[0020] Fig.12 Yes means Fig.11A three-dimensional schematic diagram of an example of a state in which the split iron core and the terminal plate are disassembled.

[0021] Fig.13 It means along Fig.11 1 is a schematic cross-sectional view of an example of a cross section of a line segment a1 - a2 of the coil unit (excluding the winding).

[0022] Fig.14 It is a schematic perspective view showing an example of a coil unit constituting a stator according to a third embodiment of the present invention.

[0023] Fig.15 Yes means Fig.14 A three-dimensional schematic diagram of the split iron core and the terminal board after being disassembled.

[0024] Fig.16 It is a perspective schematic diagram showing an example of a coil unit constituting a stator according to a fourth embodiment of the present invention.

[0025] Fig.17 Yes means Fig.16 A three-dimensional schematic diagram of an example of a state in which the split iron core and the terminal plate are disassembled.

[0026] Fig.18 It is a perspective schematic diagram showing an example of a coil unit constituting a stator according to Embodiment 5 of the present invention.

[0027] Fig.19 Yes means Fig.18 A three-dimensional schematic diagram of an example of a state in which the split iron core and the terminal plate are disassembled.

[0028] Fig. 20 It means along Fig.18 1 is a schematic cross-sectional view of an example of a cross section of a line segment b1 - b2 of the coil unit (excluding the winding).

[0029] Fig.21 It is a perspective schematic diagram showing an example of a coil unit constituting a stator according to Embodiment 6 of the present invention.

[0030] Fig. 22 Yes means Fig.21 A three-dimensional schematic diagram of an example of a state in which the split iron core and the terminal plate are disassembled.

[0031] Fig.23 It means along Fig.21 1 is a schematic cross-sectional view of an example of a cross section of a line segment c1 - c2 of the coil unit shown.

[0032] Fig.24 It means along Fig.212 is a schematic cross-sectional view of another example of the cross section of the line segment c1 - c2 of the coil unit shown.

[0033] Fig.25 It is a perspective schematic diagram showing an example of a stator according to Embodiment 7 of the present invention.

[0034] Fig.26 Yes means Fig.25 A three-dimensional schematic diagram of the coil unit in FIG.

[0035] Fig. 27 It is a perspective schematic diagram showing an example of a motor according to an eighth embodiment of the present invention.

[0036] Fig.28 It is a perspective schematic diagram showing an example of a motor according to a ninth embodiment of the present invention. DETAILED DESCRIPTION

[0037] The stator of the present invention and the motor of the present invention are described below. In addition, the present invention is not limited to the following structure, and can also be appropriately changed within the scope of the main purpose of the present invention. In addition, a structure in which a plurality of the preferred structures described below are combined is also the present invention.

[0038] The embodiments shown below are examples, and it is of course possible to replace or combine parts of the structures shown in different embodiments. After the second embodiment, the same items as those in the first embodiment are omitted, and the description is mainly based on the different points. In particular, the same effects brought about by the same structure are not mentioned in sequence in each embodiment.

[0039] In the following description, when the embodiments are not particularly distinguished, they are simply referred to as “the stator of the present invention” and “the motor of the present invention”.

[0040] The drawings shown below are schematic diagrams, and the dimensions, aspect ratios, and the like may differ from those of actual products.

[0041] [stator]

[0042] The stator of the present invention is characterized in that it comprises: a stator core, having an annular yoke along a circumferential direction and teeth protruding radially from the inner circumferential surface of the yoke toward the yoke, and composed of a molded body of magnetic powder; a coil, composed of a winding wound on the teeth; and a terminal plate, fixed to the end face of the yoke in the axial direction of the stator core, the terminal plate having a plate portion and a terminal portion fixed to the plate portion, the plate portion having a first main surface located on the end face side of the yoke in the axial direction, and a second main surface located on the opposite side of the yoke to the end face, the terminal portion protruding from at least the second main surface of the plate portion toward the axial direction, and one end of the winding is fixed in a state of being wound around the terminal portion.

[0043] <Implementation method 1>

[0044] An example of the stator of the present invention will be described as a stator according to Embodiment 1 of the present invention.

[0045] Figure 1 This is a schematic perspective view showing an example of a stator according to Embodiment 1 of the present invention.

[0046] Figure 1 The stator 20A shown has a stator core 30A, a plurality of coils 40A, and a plurality of terminal boards 50A.

[0047] The stator core 30A has a yoke (also referred to as a core back) 31 and a plurality of teeth 32 .

[0048] In this specification, the direction in which the axis of the stator core extends is defined as the axial direction. In addition, the direction along the outer peripheral surface of the yoke when viewed from the axial direction is defined as the circumferential direction. Furthermore, the direction perpendicular to the axial direction and in which the outer peripheral surface and the inner peripheral surface of the yoke are opposite is defined as the radial direction.

[0049] The yoke 31 has an annular shape along the circumferential direction.

[0050] The plurality of teeth 32 independently protrude from the inner peripheral surface of the yoke 31 in the radial direction of the yoke 31 so as to be separated from each other in the circumferential direction. In this way, the plurality of teeth 32 are integrated with the yoke 31 .

[0051] The stator core 30A is formed of a molded body of magnetic powder. In other words, the yoke 31 and the teeth 32 of the stator core 30A are formed by integrating the molded body of magnetic powder.

[0052] In the stator of the present invention, it is preferable that the stator core is formed of a powder magnetic core.

[0053] In the stator 20A, the stator core 30A is preferably formed of a powder core. In other words, the yoke 31 and the teeth 32 of the stator core 30A are preferably formed by integrating the powder core.

[0054] The stator core 30A may be formed of a molded body of a composite material including magnetic powder and resin instead of a powder core.

[0055] Each of the plurality of coils 40A is constituted by a winding 41 wound around the tooth 32. Each of the plurality of coils 40A is independently provided on the tooth 32 so as to be separated from each other in the circumferential direction.

[0056] Each of the plurality of coils 40A is insulated from the teeth 32 via an insulating member described later, for example.

[0057] For example, in the case of three phases, the plurality of coils 40A include a coil composed of a U-phase winding, a coil composed of a V-phase winding, and a coil composed of a W-phase winding. In this case, the U-phase winding, the V-phase winding, and the W-phase winding are connected by star connection or delta connection.

[0058] As the winding 41 , for example, polyurethane copper wire (UEW) or the like is cited.

[0059] The plurality of terminal plates 50A are respectively fixed to the end surfaces 31 a of the yoke 31 in the axial direction of the stator core 30A.

[0060] The terminal plate 50A includes a plate portion 51 , a terminal portion 52 a , and a terminal portion 52 b .

[0061] The plate portion 51 has a first main surface 51 a located on the end surface 31 a side of the yoke 31 and a second main surface 51 b located on the opposite side of the end surface 31 a of the yoke 31 in the axial direction.

[0062] The plate portion 51 is preferably made of an insulating material.

[0063] Examples of the insulating material constituting the plate portion 51 include resins such as polyphenylene sulfide (PPS).

[0064] The terminal portion 52 a and the terminal portion 52 b are fixed to the plate portion 51 .

[0065] The terminal portion 52 a and the terminal portion 52 b protrude in the axial direction from at least the second main surface 51 b of the plate portion 51 .

[0066] The terminal portion 52a and the terminal portion 52b are separated from each other in the circumferential direction.

[0067] In the stator of the present invention, it is preferable that the terminal portion is made of a conductive material.

[0068] In the stator 20A, the terminal portion 52a and the terminal portion 52b are preferably made of a conductive material. In this case, the one end portion 41a of the winding 41 and the terminal of the wiring substrate described later can be easily connected via the terminal portion 52a. In addition, the other end portion 41b of the winding 41 and the terminal of the wiring substrate described later can be easily connected via the terminal portion 52b.

[0069] As a conductive material constituting the terminal portion 52a and the terminal portion 52b, metal such as phosphor bronze is mentioned, for example.

[0070] The terminal portion 52a and the terminal portion 52b may also be made of an insulating material. In this case, there is no need to consider the insulation between the terminal portion 52a and the stator core 30A, and the insulation between the terminal portion 52b and the stator core 30A, so the terminal portion 52a and the terminal portion 52b can be easily fixed to the plate portion 51. In addition, by integrally molding the terminal portion 52a and the terminal portion 52b with the plate portion 51, the terminal plate 50A can be easily manufactured.

[0071] Examples of insulating materials constituting the terminal portions 52 a and 52 b include resins such as polyphenylene sulfide.

[0072] The terminal portion 52 a and the terminal portion 52 b are preferably formed of the same structural material, but may be formed of different structural materials.

[0073] Examples of the three-dimensional shapes of the terminal portions 52 a and 52 b include a cylindrical shape and a prism shape.

[0074] The three-dimensional shapes of the terminal portion 52 a and the terminal portion 52 b are preferably the same as each other, but may be different from each other.

[0075] As described above, the terminal plate 50A is fixed to the end surface 31 a of the yoke 31 . That is, the terminal plate 50A is fixed to the end surface 31 a of the yoke 31 on the first main surface 51 a side of the plate portion 51 .

[0076] The terminal plate 50A is preferably fixed to the end face 31a of the yoke 31 via an insulating member (not shown). In other words, the insulating member is preferably interposed between the end face 31a of the yoke 31 and the first main surface 51a of the plate portion 51. In this case, insulation between the yoke 31 and the terminal plate 50A is ensured, and in particular, insulation between the yoke 31 and the terminal portion 52a and insulation between the yoke 31 and the terminal portion 52b are ensured.

[0077] The insulating member may be an insulating film covering at least one of the end face 31a of the yoke 31 and the first main face 51a of the plate portion 51. In this case, the end face 31a of the yoke 31 may be covered with the insulating film, the first main face 51a of the plate portion 51 may be covered with the insulating film, or both the end face 31a of the yoke 31 and the first main face 51a of the plate portion 51 may be covered with the insulating film.

[0078] When the end surface 31a of the yoke 31 is covered with an insulating film, the entire surface of the stator core 30A is preferably covered with the insulating film. When the end surface 31a of the yoke 31 is covered with an insulating film, the entire surface of the stator core 30A may not be covered.

[0079] When the first main surface 51a of the plate portion 51 is covered with an insulating film, the entire surface of the plate portion 51 is preferably covered with the insulating film. When the first main surface 51a of the plate portion 51 is covered with an insulating film, the entire surface of the plate portion 51 may not be covered.

[0080] Examples of a method for covering target surfaces such as the end surface 31 a of the yoke 31 and the first main surface 51 a of the plate portion 51 with an insulating film include a method of applying an insulating material to the target surface by a coating method such as electrodeposition coating.

[0081] The insulating member may be an insulating sheet formed in advance from an insulating material. In this case, the insulating sheet is disposed at least between the end surface 31 a of the yoke 31 and the first main surface 51 a of the plate portion 51 .

[0082] As described above, when the plate portion 51 is made of an insulating material, the first main surface 51a of the plate portion 51 may not be covered with an insulating film. However, for example, as described later, when the terminal portion 52a and the terminal portion 52b are exposed from the first main surface 51a of the plate portion 51, it is preferred that the exposed portions of the terminal portion 52a and the terminal portion 52b exposed from the first main surface 51a of the plate portion 51 are covered with an insulating film.

[0083] One end portion 41a of the winding 41 is fixed in a state of being wound around the terminal portion 52a. Thus, one end portion 41a of the winding 41 is led out to the terminal plate 50A.

[0084] One end 41a of the winding 41 may be fixed to the terminal portion 52a by soldering after being wound around the terminal portion 52a. Alternatively, one end 41a of the winding 41 may be fixed to the terminal portion 52a and a terminal of a wiring substrate described later by soldering after being wound around the terminal portion 52a.

[0085] It is preferable that the other end 41b of the winding 41 is fixed in a state of being wound around the terminal portion 52b. In this case, the other end 41b of the winding 41 is led out to the terminal plate 50A.

[0086] The other end 41b of the winding 41 may be fixed to the terminal portion 52b by soldering after being wound around the terminal portion 52b. Alternatively, the other end 41b of the winding 41 may be fixed to the terminal portion 52b and a terminal of a wiring substrate described later by soldering after being wound around the terminal portion 52b.

[0087] In the stator 20A, at least one coil 40A in which one end 41a of the winding 41 is fixed while being wound around the terminal portion 52a is sufficient, and preferably, one end 41a of the winding 41 is fixed while being wound around the terminal portion 52a for all the coils 40A.

[0088] In the stator 20A, if Figure 1 As shown, for all coils 40A, it is particularly preferred that one end 41a of the winding 41 is fixed in a state of being wound around the terminal portion 52a, and the other end 41b of the winding 41 is fixed in a state of being wound around the terminal portion 52b.

[0089] In addition, in the stator 20A, as long as there is at least one coil 40A in which one end 41a of the winding 41 is fixed in a state of being wound around the terminal portion 52a, there may be a coil 40A in which one end 41a of the winding 41 is fixed in a state of being wound around the terminal portion 52a and the other end 41b of the winding 41 is not fixed in a state of being wound around the terminal portion 52b, and there may be a coil 40A in which both ends of the winding 41 are not fixed in a state of being wound around the terminal portion.

[0090] As described above, in the stator 20A, the coil 40A can be electrically led out by using the terminal plate 50A fixed to the end surface 31 a of the yoke 31 , for example, to electrically connect to a wiring substrate described later.

[0091] When manufacturing the stator 20A, as described later, there is no need to perform additional processing on the molded stator core 30A in order to fix the terminal plate 50A to the end surface 31a of the yoke 31. Therefore, a decrease in the manufacturing efficiency of the stator 20A is suppressed.

[0092] When manufacturing the stator 20A, as described later, there is no need to perform additional processing on the formed stator core 30A in order to fix the terminal plate 50A to the end surface 31a of the yoke 31. Therefore, when manufacturing the stator 20A, the stator core 30A is not damaged, and as a result, the strength of the stator 20A (more specifically, the stator core 30A) is suppressed from being reduced.

[0093] Therefore, according to the stator 20A, it is possible to realize the electric conduction of the coil 40A while suppressing a decrease in manufacturing efficiency and a decrease in strength.

[0094] In the stator 20A, the terminal plate 50A is fixed to the end surface 31a of the yoke 31, so the space factor of the coil 40A (winding 41) is not reduced by providing the terminal plate 50A. Thus, the power density of the motor in which the stator 20A is assembled is ensured.

[0095] Hereinafter, a stator in which a plurality of coil units are arranged in a ring shape in the circumferential direction will be described as an example of the stator of the present invention, and a method of fixing the terminal plate and the end surface of the yoke in each coil unit will be described.

[0096] The stator of the present invention may be formed by arranging a plurality of coil units in a ring shape along the circumferential direction, and the plurality of coil units may each independently include a split core obtained by splitting the stator core along the circumferential direction, the coil, and the terminal board.

[0097] Figure 1 The stator 20A shown is formed by arranging a plurality of coil units 70A in a ring shape in the circumferential direction.

[0098] Figure 2 Yes means Figure 1 A three-dimensional schematic diagram of the coil unit in FIG. Figure 3 Yes means Figure 2 A three-dimensional schematic diagram of the split iron core in FIG. Figure 4 Yes means Figure 2 A three-dimensional schematic diagram of the split core and terminal board after being disassembled. Figure 4 In the figure, the coil is not shown for easy understanding of the structure of the split core and the terminal plate. The coil is not shown in the subsequent figures showing the split core and the terminal plate in an exploded state for the same reason.

[0099] Figure 2 The coil unit 70A shown includes a split core 80A, a coil 40A, and a terminal block 50A.

[0100] The split core 80A is formed by splitting the stator core 30A in the circumferential direction. In other words, the stator core 30A is formed by arranging a plurality of split cores 80A in a ring shape in the circumferential direction.

[0101] The split core 80A includes a split yoke 81 and teeth 32 .

[0102] The split yoke 81 is formed by splitting the yoke 31 in the circumferential direction.

[0103] The teeth 32 protrude radially from the inner peripheral surface of the split yoke 81 . In this way, the teeth 32 and the split yoke 81 are integrated.

[0104] The split core 80A is formed of a molded body of magnetic powder. That is, the split yoke 81 and the teeth 32 of the split core 80A are formed by integrating the molded body of magnetic powder.

[0105] When viewed from the axial direction, the outer periphery of the split core 80A along the circumferential direction, that is, the outer periphery of the split yoke 81 along the circumferential direction may be, for example, a curved shape, a straight line shape, or a shape combining the curved shape and the straight line shape. The arrangement of the split yoke 81 along the circumferential direction in which the outer periphery when viewed from the axial direction is the above-mentioned shape is included in the mode in which the yoke 31 is annular along the circumferential direction.

[0106] In the split core 80A, the teeth 32 are preferably thinner on the split yoke 81 side than on the side opposite to the split yoke 81 in at least one direction of the axial direction and the circumferential direction. Figure 3 In the example shown, the teeth 32 are thinner in the circumferential direction on the split yoke 81 side than on the side opposite to the split yoke 81 .

[0107] That is, in the stator core 30A in which the plurality of split cores 80A are annularly arranged in the circumferential direction, the teeth 32 are preferably thinner on the yoke 31 side than on the side opposite to the yoke 31 in at least one of the axial direction and the circumferential direction.

[0108] If the yoke 31 side (segmented yoke 81 side) of the tooth 32 is thinner than the opposite side of the yoke 31 (opposite side of the segmented yoke 81), the number of windings of the coil 40A can be increased by using the thinner portion as the winding axis of the coil 40A. As a result, in the motor assembled with the stator 20A, it is easy to increase the magnetic flux penetrating the coil 40A, so it is easy to increase the output torque of the motor.

[0109] The coil 40A is provided on the teeth 32 of the split core 80A.

[0110] The terminal plate 50A is fixed to the end surface 81 a of the split yoke 81 of the split core 80A in the axial direction.

[0111] like Figure 4 As shown, the terminal portion 52 a and the terminal portion 52 b protrude in the axial direction from the second main surface 51 b of the plate portion 51 .

[0112] The terminal portions 52 a and 52 b penetrate the plate portion 51 in the axial direction and are exposed from the first main surface 51 a of the plate portion 51 .

[0113] The terminal portion 52 a and the terminal portion 52 b do not protrude in the axial direction from the first main surface 51 a of the plate portion 51 .

[0114] In addition, at least one of the terminal portion 52 a and the terminal portion 52 b may protrude in the axial direction from the first main surface 51 a of the plate portion 51 .

[0115] In the stator of the present invention, the end face of the yoke and the first main face of the plate portion may also be fitted together via a fitting portion. In this case, in the stator of the present invention, the fitting portion may be formed by fitting together a convex portion protruding in the axial direction from one direction of the end face of the yoke and the first main face of the plate portion and a concave portion recessed in the axial direction from another direction of the end face of the yoke and the first main face of the plate portion.

[0116] like Figure 3 as well as Figure 4 As shown, the split yoke 81 of the split core 80A is provided with a recessed portion 86 b and a recessed portion 86 c that are recessed in the axial direction from the end surface 81 a .

[0117] The recessed portion 86b and the recessed portion 86c are provided on the periphery of the end surface 81a of the split yoke 81. More specifically, the recessed portion 86b and the recessed portion 86c are provided from the end surface 81a of the split yoke 81 to the inner peripheral surface of the split yoke 81 in the radial direction.

[0118] The recessed portion 86b is separated from the recessed portion 86c in the circumferential direction.

[0119] The three-dimensional shapes of the recessed portion 86b and the recessed portion 86c may be the same as or different from each other.

[0120] like Figure 4 As shown, the plate portion 51 of the terminal plate 50A is provided with a convex portion 55 b and a convex portion 55 c that protrude in the axial direction from the first main surface 51 a .

[0121] The convex portion 55 b and the convex portion 55 c are provided on the peripheral edge of the first main surface 51 a of the plate portion 51 .

[0122] The convex portion 55b is separated from the convex portion 55c in the circumferential direction.

[0123] The three-dimensional shapes of the convex portion 55b and the convex portion 55c may be the same as or different from each other.

[0124] In the coil unit 70A, as Figure 4 As shown, the end face 81a of the split yoke 81 and the first main face 51a of the plate portion 51 are interlocked through the interlocking portion 90A. The interlocking portion 90A includes an interlocking portion 90ba formed by interlocking the recess 86b and the protrusion 55b, and an interlocking portion 90ca formed by interlocking the recess 86c and the protrusion 55c. That is, in the coil unit 70A, the terminal plate 50A is fixed to the end face 81a of the split yoke 81 by interlocking the recess 86b and the protrusion 55b, and interlocking the recess 86c and the protrusion 55c.

[0125] As described above, in coil unit 70A, end surface 81a of split yoke 81 and first main surface 51a of plate portion 51 are fitted by fitting portion 90A, thereby facilitating fixing terminal plate 50A to end surface 81a of split yoke 81 and facilitating positioning of terminal plate 50A.

[0126] In the split core 80A, the recessed portion 86b and the recessed portion 86c are provided on the end surface 81a of the split yoke 81, but the recessed portion 86b and the recessed portion 86c are formed at the same time as the split core 80A is formed. That is, when manufacturing the coil unit 70A, it is not necessary to perform additional processing on the formed split core 80A in order to provide the recessed portion 86b and the recessed portion 86c on the end surface 81a of the split yoke 81. Therefore, the manufacturing efficiency of the coil unit 70A is suppressed from being reduced.

[0127] Furthermore, when providing recessed portions 86b and 86c on end surface 81a of split yoke 81 during manufacture of coil unit 70A, split core 80A is not damaged, thereby suppressing reduction in strength of coil unit 70A (more specifically, split core 80A).

[0128] Therefore, even if the recessed portions 86 b and the recessed portions 86 c are provided in the stator 20A in which the plurality of coil units 70A are arranged in a ring shape in the circumferential direction, a decrease in manufacturing efficiency and a decrease in strength can be suppressed.

[0129] In contrast, in the case where the busbar is fixed to the stator core by screwing, as in the electric motor described in Patent Document 1, after the stator core is manufactured, additional processing is required to form a threaded hole in the stator core, thereby reducing manufacturing efficiency. In addition, the stator core is damaged when the threaded hole is formed, so the strength of the stator core is reduced. In addition, for example, in the case where the stator core is composed of a powder core, since the powder core is brittle, it is difficult to form a threaded hole in the stator core.

[0130] The recessed portion 86b and the recessed portion 86c provided on the end surface 81a of the split yoke 81 can function when the first main surface 51a of the plate portion 51 and the end surface 81a of the split yoke 81 are fitted together, even if they are shallower than the threaded hole described in Patent Document 1. Therefore, in the coil unit 70A, even if the recessed portion 86b and the recessed portion 86c are provided on the end surface 81a of the split yoke 81, the influence on the magnetic characteristics can be suppressed to a minimum. Therefore, in the stator 20A in which a plurality of coil units 70A are arranged in a ring shape along the circumferential direction, even if the recessed portion 86b and the recessed portion 86c are provided, the influence on the magnetic characteristics can be suppressed to a minimum.

[0131] In the stator of the present invention, it is preferable that the winding extends toward the terminal portion so as to contact the protrusion at one end side.

[0132] exist Figure 2 In the coil unit 70A shown, the winding 41 extends toward the terminal portion 52 a so as to come into contact with the protrusion 55 b at one end portion 41 a side.

[0133] The boundary between the end face 81a of the split yoke 81 and the inner peripheral surface of the split yoke 81 is thickened during the manufacturing process of the split core 80A, and burrs may be formed. Therefore, when the one end 41a of the winding 41 is led out to the terminal portion 52a, if the winding 41 contacts the boundary between the end face 81a of the split yoke 81 and the inner peripheral surface of the split yoke 81 on the one end 41a side, the insulating film of the winding 41 may be damaged due to the burrs.

[0134] In contrast, Figure 2 In the coil unit 70A shown, the winding 41 extends toward the terminal portion 52a so as to contact the convex portion 55b on the one end portion 41a side. Thus, when the one end portion 41a of the winding 41 is led out to the terminal portion 52a, the winding 41 on the one end portion 41a side can avoid the boundary between the end face 81a of the split yoke 81 and the inner peripheral surface of the split yoke 81, thereby preventing the insulation film of the winding 41 from being damaged.

[0135] exist Figure 2 In the coil unit 70A shown, the winding 41 preferably extends toward the terminal portion 52b so as to contact the convex portion 55c on the other end portion 41b side. In this case, when the other end portion 41b of the winding 41 is led out to the terminal portion 52b, the winding 41 can avoid the boundary between the end face 81a of the split yoke 81 and the inner peripheral surface of the split yoke 81 on the other end portion 41b side, thereby preventing the insulation film of the winding 41 from being damaged.

[0136] In the stator of the present invention, it is preferable that the inner end of the terminal plate is not located inside the inner end of the yoke in the radial direction.

[0137] exist Figure 2 In the coil unit 70A shown, the inner end of the terminal plate 50A is not located radially inward of the inner end of the split yoke 81 (more specifically, the end face 81a of the split yoke 81). In this case, it is easier to wind one end 41a of the winding 41 around the terminal portion 52a, and further easier to wind the other end 41b of the winding 41 around the terminal portion 52b, compared to a case where the inner end of the terminal plate 50A is located radially inward of the inner end of the split yoke 81.

[0138] In the coil unit 70A, as a mode in which the inner end of the terminal plate 50A is not located radially inward of the inner end of the split yoke 81, the inner end of the terminal plate 50A may be radially located relative to the inner end of the split yoke 81 as follows: Figure 2It is located in the same position as shown, or it can be located on the outside.

[0139] In coil unit 70A, the outer end of terminal plate 50A may be located inside, at the same position, or outside the outer end of split yoke 81 (more specifically, end surface 81 a of split yoke 81 ) in the radial direction.

[0140] In the coil unit 70A, as Figure 2 As shown, it is preferred that the outer end of the terminal plate 50A is not located outside the outer end of the split yoke 81 (more specifically, the end face 81a of the split yoke 81) in the circumferential direction. In this case, compared with a case where the outer end of the terminal plate 50A is located outside the outer end of the split yoke 81 in the circumferential direction, it is easier to arrange the plurality of coil units 70A in a ring shape in the circumferential direction without interfering with each other when manufacturing the stator 20A.

[0141] In the coil unit 70A, as a mode in which the outer end of the terminal plate 50A is not located outside the outer end of the split yoke 81 in the circumferential direction, the outer end of the terminal plate 50A may be located relative to the outer end of the split yoke 81 in the circumferential direction. Figure 2 It is located in the same position as shown, or it can be located on the inside.

[0142] In the stator of the present invention, the fitting portion where the end surface of the yoke and the first main surface of the plate portion are fitted together is not limited to Figure 4 Other aspects of the fitting portion for fitting the end surface of the yoke and the first main surface of the plate portion are described below by citing other embodiments.

[0143] <Variation 1 of Embodiment 1>

[0144] Figure 5 This is a schematic perspective view showing an example of a coil unit constituting a stator according to Modification 1 of Embodiment 1 of the present invention. Figure 6 Yes means Figure 5 A three-dimensional schematic diagram of the split iron core and the terminal board after being disassembled.

[0145] Figure 5 The coil unit 70B shown includes a split core 80B, a coil 40A, and a terminal block 50B.

[0146] like Figure 6 As shown, the split yoke 81 of the split core 80B is provided with a convex portion 85 b and a convex portion 85 c that protrude in the axial direction from the end surface 81 a .

[0147] The convex portion 85 b and the convex portion 85 c are provided on the periphery of the end surface 81 a of the split yoke 81 .

[0148] The convex portion 85b is separated from the convex portion 85c in the circumferential direction.

[0149] The three-dimensional shapes of the convex portion 85b and the convex portion 85c may be the same as or different from each other.

[0150] like Figure 6 As shown, the plate portion 51 of the terminal plate 50B is provided with a recessed portion 56 b and a recessed portion 56 c that are recessed in the axial direction from the first main surface 51 a .

[0151] The recessed portion 56 b and the recessed portion 56 c are provided on the peripheral edge of the first main surface 51 a of the plate portion 51 .

[0152] The recessed portion 56b is separated from the recessed portion 56c in the circumferential direction.

[0153] The three-dimensional shapes of the recessed portion 56 b and the recessed portion 56 c may be the same as or different from each other.

[0154] In the coil unit 70B, as Figure 6 As shown, the end face 81a of the split yoke 81 and the first main face 51a of the plate portion 51 are interlocked through the interlocking portion 90B. The interlocking portion 90B includes an interlocking portion 90bb formed by interlocking the convex portion 85b and the concave portion 56b, and an interlocking portion 90cb formed by interlocking the convex portion 85c and the concave portion 56c. That is, in the coil unit 70B, the terminal plate 50B is fixed to the end face 81a of the split yoke 81 by interlocking the convex portion 85b and the concave portion 56b and interlocking the convex portion 85c and the concave portion 56c.

[0155] As described above, in coil unit 70B, end surface 81a of split yoke 81 and first main surface 51a of plate portion 51 are fitted through fitting portion 90B, thereby facilitating fixing terminal plate 50B to end surface 81a of split yoke 81 and facilitating positioning of terminal plate 50B.

[0156] In the split core 80B, the convex portion 85b and the convex portion 85c are provided on the end face 81a of the split yoke 81, but the convex portion 85b and the convex portion 85c are formed at the same time as the split core 80B is formed. In other words, when manufacturing the coil unit 70B, it is not necessary to perform additional processing on the formed split core 80B in order to provide the convex portion 85b and the convex portion 85c on the end face 81a of the split yoke 81. Therefore, the manufacturing efficiency of the coil unit 70B is suppressed from being reduced, and the strength of the coil unit 70B (more specifically, the split core 80B) is suppressed from being reduced.

[0157] <Variation 2 of Embodiment 1>

[0158] Figure 7 It is a schematic perspective view showing an example of a coil unit constituting a stator according to a second modification of the first embodiment of the present invention. Figure 8 Yes means Figure 7 A three-dimensional schematic diagram of the split iron core and the terminal board after being disassembled.

[0159] Figure 7 The coil unit 70C shown includes a split core 80C, a coil 40A, and a terminal board 50C.

[0160] like Figure 8 As shown, the split yoke 81 of the split core 80C is provided with a convex portion 85a protruding in the axial direction from the end surface 81a. In addition, the split yoke 81 of the split core 80C is provided with a concave portion 86b and a concave portion 86c recessed in the axial direction from the end surface 81a.

[0161] The convex portion 85 a , the concave portion 86 b , and the concave portion 86 c are provided on the periphery of the end surface 81 a of the split yoke 81 .

[0162] The convex portion 85a is located on the inner side than the concave portion 86b and the concave portion 86c in the circumferential direction. In addition, the convex portion 85a is located on the outer side than the concave portion 86b and the concave portion 86c in the radial direction.

[0163] The recessed portion 86b is located outside the convex portion 85a in the circumferential direction. In addition, the recessed portion 86b is located inside the convex portion 85a in the radial direction. Furthermore, the recessed portion 86b is separated from the recessed portion 86c in the circumferential direction.

[0164] The recessed portion 86c is located outside the convex portion 85a in the circumferential direction. In addition, the recessed portion 86c is located inside the convex portion 85a in the radial direction.

[0165] The three-dimensional shapes of the recessed portion 86b and the recessed portion 86c may be the same as or different from each other.

[0166] like Figure 8 As shown, the plate portion 51 of the terminal plate 50C is provided with a recessed portion 56a recessed in the axial direction from the first main surface 51a. Also, the plate portion 51 of the terminal plate 50C is provided with convex portions 55b and 55c protruding in the axial direction from the first main surface 51a.

[0167] The recessed portion 56 a , the raised portion 55 b , and the raised portion 55 c are provided on the periphery of the first main surface 51 a of the plate portion 51 .

[0168] The recessed portion 56a is located inside the convex portion 55b and the convex portion 55c in the circumferential direction. In addition, the recessed portion 56a is located outside the convex portion 55b and the convex portion 55c in the radial direction.

[0169] The convex portion 55b is located outside the concave portion 56a in the circumferential direction. In addition, the convex portion 55b is located inside the concave portion 56a in the radial direction. Furthermore, the convex portion 55b is separated from the convex portion 55c in the circumferential direction.

[0170] The convex portion 55c is located outside the concave portion 56a in the circumferential direction. In addition, the convex portion 55c is located inside the concave portion 56a in the radial direction.

[0171] The three-dimensional shapes of the convex portion 55b and the convex portion 55c may be the same as or different from each other.

[0172] In the coil unit 70C, as Figure 8 As shown, the end face 81a of the split yoke 81 and the first main face 51a of the plate portion 51 are interlocked through the interlocking portion 90C. The interlocking portion 90C includes: an interlocking portion 90ab formed by interlocking the convex portion 85a and the concave portion 56a, an interlocking portion 90ba formed by interlocking the concave portion 86b and the convex portion 55b, and an interlocking portion 90ca formed by interlocking the concave portion 86c and the convex portion 55c. That is, in the coil unit 70C, the terminal plate 50C is fixed to the end face 81a of the split yoke 81 by interlocking the convex portion 85a and the concave portion 56a, interlocking the concave portion 86b and the convex portion 55b, and interlocking the concave portion 86c and the convex portion 55c.

[0173] As described above, in coil unit 70C, end surface 81a of split yoke 81 and first main surface 51a of plate portion 51 are fitted together by fitting portion 90C, thereby facilitating fixing terminal plate 50C to end surface 81a of split yoke 81 and facilitating positioning of terminal plate 50C.

[0174] In the split core 80C, the convex portion 85a, the concave portion 86b, and the concave portion 86c are provided on the end surface 81a of the split yoke 81, but the convex portion 85a, the concave portion 86b, and the concave portion 86c are formed at the same time as the split core 80C is formed. That is, when manufacturing the coil unit 70C, it is not necessary to perform additional processing on the formed split core 80C in order to provide the convex portion 85a, the concave portion 86b, and the concave portion 86c on the end surface 81a of the split yoke 81. Therefore, the manufacturing efficiency of the coil unit 70C is suppressed from being reduced, and the strength of the coil unit 70C (more specifically, the split core 80C) is suppressed from being reduced.

[0175] In the stator of the present invention, the fitting portion may overlap with a peripheral edge of the end surface of the yoke and a peripheral edge of the first main surface of the plate portion in the axial direction.

[0176] Figure 8 The illustrated fitting portions 90C, here fitting portions 90ab, 90ba, and 90ca, overlap with the periphery of the end surface 81a of the split yoke 81 and the periphery of the first main surface 51a of the plate portion 51 in the axial direction.

[0177] In the stator of the present invention, it is preferred that the fitting portion includes a first fitting portion and a second fitting portion located on an inner side than the first fitting portion in the radial direction.

[0178] Figure 8 The illustrated interlocking portion 90C includes an interlocking portion 90ab, and an interlocking portion 90ba or an interlocking portion 90ca located radially inward of the interlocking portion 90ab. That is, in the interlocking portion 90C, the interlocking portion 90ab is equivalent to the first interlocking portion, and the interlocking portion 90ba or the interlocking portion 90ca is equivalent to the second interlocking portion. In this way, the interlocking portion where the end face 81a of the split yoke 81 and the first main face 51a of the plate portion 51 are interlocked is separated and arranged to be separated in the radial direction, so that the terminal plate 50C is difficult to deviate from the end face 81a of the split yoke 81.

[0179] In the stator of the present invention, it is preferred that the fitting portion further includes a third fitting portion that is located inside the first fitting portion in the radial direction and is separated from the second fitting portion in the circumferential direction.

[0180] Figure 8 The illustrated interlocking portion 90C includes an interlocking portion 90ba and an interlocking portion 90ca which are located radially inward of the interlocking portion 90ab and are separated from each other in the circumferential direction. That is, in the interlocking portion 90C, the interlocking portion 90ab is equivalent to the first interlocking portion, one of the interlocking portion 90ba and the interlocking portion 90ca is equivalent to the second interlocking portion, and the other of the interlocking portion 90ba and the interlocking portion 90ca is equivalent to the third interlocking portion. In this way, the interlocking portion where the end face 81a of the split yoke 81 and the first main face 51a of the plate portion 51 are interlocked is separated and arranged to be separated in the radial direction and the circumferential direction, so that the terminal plate 50C is very difficult to deviate from the end face 81a of the split yoke 81.

[0181] exist Figure 8 In the embodiment, three interlocking parts are provided in a set of split yoke 81 and plate 51, but the total number of interlocking parts is not particularly limited. That is, one or more interlocking parts may be provided in a set of split yoke 81 and plate 51.

[0182] exist Figure 8 In the example, in a set of split yokes 81 and plate portion 51, one interlocking portion is provided on the radially outer side and two interlocking portions are provided on the radially inner side, but the number of interlocking portions on the radially outer side and inner side is not particularly limited. For example, in a set of split yokes 81 and plate portion 51, at least one interlocking portion may be provided on the radially outer side and at least one on the radially inner side. In this case, the number of interlocking portions in a set of split yokes 81 and plate portion 51 may be the same or different on the radially outer side and inner side. In addition, in a set of split yokes 81 and plate portion 51, the interlocking portion may not be provided on either the radially outer side or the radially inner side.

[0183] exist Figure 8 In the embodiment, the fitting portions where the end surface 81 a of the split yoke 81 and the first main surface 51 a of the plate portion 51 are fitted are provided to be separated in the radial direction, but the fitting portions do not need to be provided to be separated in the radial direction.

[0184] exist Figure 8 In the embodiment, the fitting portions where the end surface 81 a of the split yoke 81 and the first main surface 51 a of the plate portion 51 are fitted are provided to be separated in the circumferential direction. However, the fitting portions may not be provided to be separated in the circumferential direction.

[0185] <Variation 3 of Embodiment 1>

[0186] Fig. 9 It is a schematic perspective view showing an example of a coil unit constituting a stator according to a third modification of the first embodiment of the present invention. Fig.10 Yes means Fig. 9 A three-dimensional schematic diagram of the split iron core and the terminal board after being disassembled.

[0187] Fig. 9 The coil unit 70D shown includes a split core 80D, a coil 40A, and a terminal board 50D.

[0188] like Fig.10 As shown, the split yoke 81 of the split core 80D is provided with a recessed portion 86 a , a recessed portion 86 b , and a recessed portion 86 c that are recessed in the axial direction from the end surface 81 a .

[0189] The recessed portion 86 a , the recessed portion 86 b , and the recessed portion 86 c are provided on the periphery of the end surface 81 a of the split yoke 81 .

[0190] The recessed portion 86a is located inside the recessed portion 86b and the recessed portion 86c in the circumferential direction. In addition, the recessed portion 86a is located outside the recessed portion 86b and the recessed portion 86c in the radial direction.

[0191] The recessed portion 86b is located outside the recessed portion 86a in the circumferential direction. In addition, the recessed portion 86b is located inside the recessed portion 86a in the radial direction. Furthermore, the recessed portion 86b is separated from the recessed portion 86c in the circumferential direction.

[0192] The recessed portion 86c is located outside the recessed portion 86a in the circumferential direction. In addition, the recessed portion 86c is located inside the recessed portion 86a in the radial direction.

[0193] The three-dimensional shapes of the recessed portion 86a, the recessed portion 86b, and the recessed portion 86c may be the same as each other, may be different from each other, or may be partially different.

[0194] like Fig.10 As shown, the plate portion 51 of the terminal plate 50D is provided with a convex portion 55a, a convex portion 55b, and a convex portion 55c that protrude in the axial direction from the first main surface 51a.

[0195] The convex portion 55 a , the convex portion 55 b , and the convex portion 55 c are provided on the peripheral edge of the first main surface 51 a of the plate portion 51 .

[0196] The convex portion 55a is located inside the convex portion 55b and the convex portion 55c in the circumferential direction. In addition, the convex portion 55a is located outside the convex portion 55b and the convex portion 55c in the radial direction.

[0197] The convex portion 55b is located outside the convex portion 55a in the circumferential direction. In addition, the convex portion 55b is located inside the convex portion 55a in the radial direction. Furthermore, the convex portion 55b is separated from the convex portion 55c in the circumferential direction.

[0198] The convex portion 55c is located outside the convex portion 55a in the circumferential direction. In addition, the convex portion 55c is located inside the convex portion 55a in the radial direction.

[0199] The three-dimensional shapes of the convex portion 55a, the convex portion 55b, and the convex portion 55c may be the same as each other, may be different from each other, or may be partially different.

[0200] In the coil unit 70D, as Fig.10 As shown, the end face 81a of the split yoke 81 and the first main face 51a of the plate portion 51 are interlocked through an interlocking portion 90D. The interlocking portion 90D includes an interlocking portion 90aa formed by interlocking the recess 86a and the convex portion 55a, an interlocking portion 90ba formed by interlocking the recess 86b and the convex portion 55b, and an interlocking portion 90ca formed by interlocking the recess 86c and the convex portion 55c. That is, in the coil unit 70D, the terminal plate 50D is fixed to the end face 81a of the split yoke 81 by interlocking the recess 86a and the convex portion 55a, interlocking the recess 86b and the convex portion 55b, and interlocking the recess 86c and the convex portion 55c.

[0201] As described above, in coil unit 70D, end surface 81a of split yoke 81 and first main surface 51a of plate portion 51 are fitted through fitting portion 90D, thereby facilitating fixing terminal plate 50D to end surface 81a of split yoke 81 and facilitating positioning of terminal plate 50D.

[0202] In the split core 80D, recesses 86a, 86b, and 86c are provided on the end surface 81a of the split yoke 81, but the recesses 86a, 86b, and 86c are formed at the same time as the split core 80D is formed. That is, when manufacturing the coil unit 70D, there is no need to perform additional processing on the formed split core 80D in order to provide the recesses 86a, 86b, and 86c on the end surface 81a of the split yoke 81. Therefore, the manufacturing efficiency of the coil unit 70D is suppressed from being reduced, and the strength of the coil unit 70D (more specifically, the split core 80D) is suppressed from being reduced.

[0203] In the stator of the present invention, the structure of the fitting portion that fits the end surface of the yoke and the first main surface of the plate portion may be a structure other than the above-mentioned first embodiment, first modification of the first embodiment, second modification of the first embodiment, and third modification of the first embodiment.

[0204] <Implementation method 2>

[0205] In the stator of the present invention, the fitting portion may overlap with the terminal portion in the axial direction. In this regard, a stator of a different form from the stator of the first embodiment of the present invention will be described below as a stator of the second embodiment of the present invention.

[0206] In the stator of the present invention, when the engaging portion overlaps with the terminal portion in the axial direction, the convex portion is preferably arranged to protrude from the first main surface of the plate portion in the axial direction, and the concave portion is preferably arranged to be recessed from the end surface of the yoke in the axial direction.

[0207] Fig.11 It is a perspective schematic diagram showing an example of a coil unit constituting a stator according to Embodiment 2 of the present invention. Fig.12 Yes means Fig.11 A three-dimensional schematic diagram of the split iron core and the terminal board after being disassembled. Fig.13 It means along Fig.11 1 is a schematic cross-sectional view of an example of a cross section of a line segment a1 - a2 of the coil unit (excluding the winding).

[0208] Fig.11 The coil unit 70E shown includes a split core 80E, a coil 40A, and a terminal board 50E.

[0209] like Fig.12 As shown, the split yoke 81 of the split core 80E is provided with a recessed portion 86d and a recessed portion 86e that are recessed in the axial direction from the end surface 81a.

[0210] The recessed portion 86d and the recessed portion 86e are separated from each other in the circumferential direction.

[0211] The three-dimensional shapes of the recessed portion 86d and the recessed portion 86e may be the same as or different from each other.

[0212] like Fig.12 As shown, the plate portion 51 of the terminal plate 50E is provided with a convex portion 55d and a convex portion 55e that protrude in the axial direction from the first main surface 51a.

[0213] The convex portion 55d overlaps with the terminal portion 52a in the axial direction.

[0214] The convex portion 55e overlaps with the terminal portion 52b in the axial direction.

[0215] The convex portion 55d and the convex portion 55e are separated from each other in the circumferential direction.

[0216] The three-dimensional shapes of the convex portion 55d and the convex portion 55e may be the same as or different from each other.

[0217] In the coil unit 70E, as Fig.12 As shown, the end face 81a of the split yoke 81 and the first main face 51a of the plate portion 51 are engaged with each other through an engagement portion 90E. The engagement portion 90E includes an engagement portion 90da formed by engaging the recess 86d and the protrusion 55d, and an engagement portion 90ea formed by engaging the recess 86e and the protrusion 55e. That is, in the coil unit 70E, the terminal plate 50E is fixed to the end face 81a of the split yoke 81 by engaging the recess 86d and the protrusion 55d, and engaging the recess 86e and the protrusion 55e.

[0218] In the interlocking portion 90E, in the interlocking portion 90da, the recessed portion 86d and the convex portion 55d overlap in the axial direction, and in the interlocking portion 90ea, the recessed portion 86e and the convex portion 55e overlap in the axial direction. On the other hand, as described above, in the terminal plate 50E, the convex portion 55d and the terminal portion 52a overlap in the axial direction, and the convex portion 55e and the terminal portion 52b overlap in the axial direction. Therefore, with respect to the positional relationship between the interlocking portion 90E and the terminal plate 50E, the interlocking portion 90da overlaps with the terminal portion 52a in the axial direction, and the interlocking portion 90ea overlaps with the terminal portion 52b in the axial direction.

[0219] As described above, in coil unit 70E, end surface 81a of split yoke 81 and first main surface 51a of plate portion 51 are fitted by fitting portion 90E, thereby facilitating fixing terminal plate 50E to end surface 81a of split yoke 81 and facilitating positioning of terminal plate 50E.

[0220] As described above, in the coil unit 70E, the terminal plate 50E can be fixed to the end surface 81a of the split yoke 81 using only the two fitting portions 90da and the fitting portion 90ea, and the terminal plate 50E can be positioned.

[0221] In the split core 80E, the recess 86d and the recess 86e are provided on the end face 81a of the split yoke 81, but the recess 86d and the recess 86e are formed at the same time as the split core 80E is formed. That is, when manufacturing the coil unit 70E, there is no need to perform additional processing on the formed split core 80E in order to provide the recess 86d and the recess 86e on the end face 81a of the split yoke 81. Therefore, the manufacturing efficiency of the coil unit 70E is suppressed from being reduced, and the strength of the coil unit 70E (more specifically, the split core 80E) is suppressed from being reduced.

[0222] Furthermore, in the terminal plate 50E, the convex portion 55d is provided at a position overlapping with the terminal portion 52a in the axial direction, so that compared with the case where the convex portion 55d is not provided, as shown in FIG. Fig.13 As shown, the axial dimension of the terminal portion 52a embedded in the plate portion 51 can be increased. As a result, in the terminal plate 50E, the terminal portion 52a is firmly fixed to the plate portion 51. The terminal portion 52a firmly fixed to the plate portion 51 is difficult to shake, so the working efficiency when the terminal portion 52a is wound around one end portion 41a of the winding 41 is easily improved.

[0223] In addition, Fig.13 , a cross section of a position where the terminal portion 52a and the protrusion 55d overlap in the axial direction in the coil unit 70E is shown, but it is preferred that a cross section of a position where the terminal portion 52b and the protrusion 55e overlap in the axial direction is also the same as Fig.13 same.

[0224] <Implementation method 3>

[0225] In the stator of the present invention, the above-mentioned interlocking portion can also be formed by interlocking the recessed portion recessed from the above-mentioned end surface of the above-mentioned yoke toward the above-mentioned axial direction with the above-mentioned plate portion. In this regard, a stator in a manner different from the stator of embodiment 1 of the present invention is described below as a stator of embodiment 3 of the present invention.

[0226] Fig.14 It is a schematic perspective view showing an example of a coil unit constituting a stator according to a third embodiment of the present invention. Fig.15 Yes means Fig.14 A three-dimensional schematic diagram of the split iron core and the terminal board after being disassembled.

[0227] Fig.14 The coil unit 70F shown includes a split core 80F, a coil 40A, and a terminal board 50F.

[0228] like Fig.15 As shown, the split yoke 81 of the split core 80F is provided with a recessed portion 86f recessed in the axial direction from the end surface 81a.

[0229] The recessed portion 86 f is provided from the inner peripheral surface to the outer peripheral surface of the split yoke 81 in the radial direction.

[0230] The terminal plate 50F has a plate portion 51 and a terminal portion 52 a .

[0231] One end 41a of the winding 41 is fixed in a state of being wound around the terminal portion 52a. Thus, the one end 41a of the winding 41 is led out to the terminal board 50F.

[0232] In the coil unit 70F, as Fig.15 As shown, the end face 81a of the split yoke 81 and the first main face 51a of the plate portion 51 are engaged with each other through an engagement portion 90F. The engagement portion 90F is composed of an engagement portion 90fa formed by engaging the recess 86f provided on the end face 81a of the split yoke 81 with the plate portion 51. That is, in the coil unit 70F, the terminal plate 50F is fixed to the end face 81a of the split yoke 81 by engaging the recess 86f with the plate portion 51.

[0233] As described above, in coil unit 70F, end surface 81a of split yoke 81 and first main surface 51a of plate portion 51 are fitted by fitting portion 90F, thereby facilitating fixing terminal plate 50F to end surface 81a of split yoke 81 and facilitating positioning of terminal plate 50F.

[0234] In the split core 80F, the recess 86f is provided on the end face 81a of the split yoke 81, but the recess 86f is formed at the same time as the split core 80F is formed. That is, when manufacturing the coil unit 70F, there is no need to perform additional processing on the formed split core 80F in order to provide the recess 86f on the end face 81a of the split yoke 81. Therefore, the manufacturing efficiency of the coil unit 70F is suppressed, and the strength of the coil unit 70F (more specifically, the split core 80F) is suppressed.

[0235] In addition, even if the recessed portion 86f provided on the end surface 81a of the split yoke 81 is shallower than the threaded hole described in Patent Document 1, it can function when the first main surface 51a of the plate portion 51 and the end surface 81a of the split yoke 81 are fitted together. Therefore, in the coil unit 70F, even if the recessed portion 86f is provided on the end surface 81a of the split yoke 81, the influence on the magnetic characteristics can be suppressed to a minimum.

[0236] In coil unit 70F, plate portion 51 is accommodated in recess 86f, so that the axial dimension of the entire coil unit is reduced compared to coil unit 70A, etc. That is, coil unit 70F can be made thinner (lower) in the axial direction.

[0237] In the coil unit 70F, in the fitting portion 90F (fitting portion 90fa), the recess 86f and at least a portion of the plate portion 51 may be fitted together. Fig.15 As shown, it is preferable that the recessed portion 86f and the entire plate portion 51 are fitted. In other words, it is preferable that the depth of the recessed portion 86f is greater than the axial dimension of the plate portion 51.

[0238] In the fitting portion 90F (fitting portion 90fa), the recessed portion 86f may be fitted with a part of the plate portion 51. That is, the axial dimension of the plate portion 51 may be larger than the depth of the recessed portion 86f.

[0239] As described above, in the stator in which the plurality of coil units 70F are arranged in a ring shape in the circumferential direction, it is possible to minimize the influence on the magnetic characteristics and achieve a reduction in weight (height) in the axial direction.

[0240] In the stator of the present invention, preferably, a winding recess is provided at a peripheral edge of the second main surface of the plate portion when viewed in the axial direction, and the winding extends toward the terminal portion so as to pass through the winding recess at one end side.

[0241] exist Fig.14 as well as Fig.15 In the coil unit 70F shown, a winding recess 57a is provided on the periphery of the second main surface 51b of the plate portion 51 when viewed from the axial direction. Furthermore, the winding 41 extends toward the terminal portion 52a so as to pass through the winding recess 57a on the side of one end portion 41a. Thus, when the one end portion 41a of the winding 41 is led out to the terminal portion 52a, the boundary contact of the winding 41 on the side of one end portion 41a with the end face 81a (recess 86f) of the split yoke 81 and the inner peripheral surface of the split yoke 81 is eased, thereby suppressing the destruction of the insulating film of the winding 41 caused by burrs that may be formed on the boundary between the end face 81a (recess 86f) of the split yoke 81 and the inner peripheral surface of the split yoke 81.

[0242] In other coil units such as the coil unit 70A, a winding recess may be provided on the periphery of the second main surface of the plate portion when viewed from the axial direction, and the winding may extend toward the terminal portion so as to pass through the winding recess on one end side.

[0243] <Implementation method 4>

[0244] In the stator of the present invention, the end surface of the yoke and the first main surface of the plate portion may be joined. In this regard, a stator different from the stator of the first embodiment of the present invention will be described below as a stator of the fourth embodiment of the present invention.

[0245] Fig.16It is a perspective schematic diagram showing an example of a coil unit constituting a stator according to a fourth embodiment of the present invention. Fig.17 Yes means Fig.16 A three-dimensional schematic diagram of the split iron core and the terminal board after being disassembled.

[0246] Fig.16 The coil unit 70G shown includes a split core 80G, a coil 40A, and a terminal block 50G.

[0247] In the coil unit 70G, the end surface 81a of the split yoke 81 is joined to the first main surface 51a of the plate portion 51. That is, the terminal plate 50G is fixed to the end surface 81a of the split yoke 81 by a joining portion (not shown).

[0248] As the joining portion, for example, an adhesive or the like is mentioned.

[0249] As described above, in coil unit 70G, by joining end surface 81a of split yoke 81 and first main surface 51a of plate portion 51, terminal plate 50G can be easily fixed to end surface 81a of split yoke 81, thereby facilitating positioning of terminal plate 50G.

[0250] Thus, in the coil unit 70G, unlike the coil unit 70A and the like, Fig.17 With the simple structure as shown without using the fitting portion, the terminal plate 50G can be fixed to the end surface 81 a of the split yoke 81 , and the terminal plate 50G can be positioned.

[0251] In a configuration in which the terminal plate is fixed to the end surface of the split yoke by a fitting portion as in the coil unit 70A, the end surface of the split yoke and the first main surface of the plate portion may be joined in addition to the fitting.

[0252] <Implementation method 5>

[0253] In the stator of the present invention, a recess overlapping with the terminal portion in the axial direction may be provided on the end surface of the yoke, and the terminal portion may be separated from the bottom surface of the recess in the axial direction. In this regard, a stator in a manner different from the stator of embodiment 1 of the present invention is described below as a stator of embodiment 5 of the present invention.

[0254] Fig.18 It is a perspective schematic diagram showing an example of a coil unit constituting a stator according to Embodiment 5 of the present invention. Fig.19 Yes means Fig.18 A three-dimensional schematic diagram of the split iron core and the terminal board after being disassembled. Fig. 20 It means along Fig.181 is a schematic cross-sectional view of an example of a cross section of a line segment b1 - b2 of the coil unit (excluding the winding).

[0255] Fig.18 The coil unit 70H shown includes a split core 80H, a coil 40A, and a terminal block 50A.

[0256] like Fig.19 As shown, the split yoke 81 of the split core 80H is provided with a recessed portion 86 b and a recessed portion 86 c that are recessed in the axial direction from the end surface 81 a .

[0257] like Fig.19 As shown in FIG. 1 , a recess 87 a and a recess 87 b are further provided on the end surface 81 a of the split yoke 81 of the split core 80H.

[0258] The recess 87a and the recess 87b are separated from each other in the circumferential direction.

[0259] The three-dimensional shapes of the recess 87a and the recess 87b may be the same as or different from each other.

[0260] The terminal board 50A of the coil unit 70H has the same structure as the terminal board 50A of the coil unit 70A. Fig.19 As shown, the plate portion 51 of the terminal plate 50A included in the coil unit 70H is provided with a protrusion 55b and a protrusion 55c that protrude in the axial direction from the first main surface 51a.

[0261] In the coil unit 70H, as Fig.19 As shown, the end surface 81a of the split yoke 81 and the first main surface 51a of the plate portion 51 are fitted through the fitting portion 90A. Thus, in the coil unit 70H, it is easy to fix the terminal plate 50A to the end surface 81a of the split yoke 81, and the positioning of the terminal plate 50A becomes easy.

[0262] In the coil unit 70H, when the terminal plate 50A is fixed to the end surface 81a of the split yoke 81, the recess 87a overlaps with the terminal portion 52a in the axial direction. Fig. 20 As shown, the terminal portion 52a is separated from the bottom surface of the recess 87a in the axial direction. Therefore, even if the terminal portion 52a is exposed from the first main surface 51a of the plate portion 51, and even if the terminal portion 52a protrudes axially from the first main surface 51a of the plate portion 51, it is possible to set a structure in which the terminal portion 52a does not contact the split yoke 81 when the terminal plate 50A is fixed to the end surface 81a of the split yoke 81. Therefore, according to Fig. 20 The structure shown in FIG. 1 ensures insulation between the split yoke 81 and the terminal portion 52a. Fig. 20In the structure shown, when one end portion 41a of the winding 41 and the terminal of the wiring substrate are electrically connected as described later, for example, when soldering is used, the heat generated during soldering is difficult to transfer from the terminal portion 52a to the split yoke 81, and as a result, it is difficult to damage the split iron core 80H, thereby suppressing a reduction in the strength of the coil unit 70H (more specifically, the split iron core 80H).

[0263] In the coil unit 70H, when the terminal plate 50A is fixed to the end surface 81a of the split yoke 81, the recess 87b overlaps with the terminal portion 52b in the axial direction. Fig. 20 Likewise, the terminal portion 52b is separated from the bottom surface of the recess 87b in the axial direction.

[0264] In the coil unit 70H, when the terminal plate 50A is fixed to the end surface 81a of the split yoke 81, at least one of the terminal portion 52a and the terminal portion 52b can be separated from the bottom surface of the recess in the axial direction, or only one of the terminal portion 52a and the terminal portion 52b can be separated from the bottom surface of the recess in the axial direction.

[0265] In the split core 80H, the recess 87a and the recess 87b are provided on the end surface 81a of the split yoke 81, but the recess 87a and the recess 87b are formed at the same time as the split core 80H is formed. That is, when manufacturing the coil unit 70H, there is no need to perform additional processing on the formed split core 80H in order to provide the recess 87a and the recess 87b on the end surface 81a of the split yoke 81. Therefore, the manufacturing efficiency of the coil unit 70H is suppressed from being reduced, and the strength of the coil unit 70H (more specifically, the split core 80H) is suppressed from being reduced.

[0266] In other coil units such as coil unit 70A (except coil unit 70E), a recess overlapping with the terminal portion in the axial direction may be provided on the end surface of the split yoke, and the terminal portion may be separated from the bottom surface of the recess in the axial direction.

[0267] <Implementation method 6>

[0268] In the stator of the present invention, the terminal portion may not penetrate the plate portion in the axial direction. In this regard, a stator of a different form from the stator of the first embodiment of the present invention will be described below as a stator of the sixth embodiment of the present invention.

[0269] Fig.21 It is a perspective schematic diagram showing an example of a coil unit constituting a stator according to Embodiment 6 of the present invention. Fig. 22 Yes means Fig.21A three-dimensional schematic diagram of the split iron core and the terminal board after being disassembled. Fig.23 It means along Fig.21 1 is a schematic cross-sectional view of an example of a cross section of a line segment c1 - c2 of the coil unit shown.

[0270] Fig.21 The coil unit 70J shown includes a split core 80A, a coil 40A, and a terminal board 50J.

[0271] The split core 80A of the coil unit 70J has the same structure as the split core 80A of the coil unit 70A. Fig. 22 As shown, the split yoke 81 of the split core 80A included in the coil unit 70J is provided with a recessed portion 86 b and a recessed portion 86 c that are recessed in the axial direction from the end surface 81 a .

[0272] The terminal plate 50J of the coil unit 70J has the same structure as the terminal plate 50A of the coil unit 70A, except that the terminal portions 52a and 52b are not exposed from the first main surface 51a of the plate portion 51 as described later. Fig. 22 As shown, the plate portion 51 of the terminal plate 50J is provided with a convex portion 55b and a convex portion 55c that protrude in the axial direction from the first main surface 51a.

[0273] In the coil unit 70J, as Fig. 22 As shown, the end surface 81a of the split yoke 81 and the first main surface 51a of the plate portion 51 are fitted through the fitting portion 90A. Thus, in the coil unit 70J, it is easy to fix the terminal plate 50J to the end surface 81a of the split yoke 81, and the positioning of the terminal plate 50J becomes easy.

[0274] In the coil unit 70J, as Fig.23 As shown, in the terminal plate 50J, the terminal portion 52a does not penetrate the plate portion 51 in the axial direction. That is, in the terminal plate 50J, the terminal portion 52a does not protrude from the first main surface 51a of the plate portion 51. Thus, it is possible to set a structure in which the terminal portion 52a does not contact the split yoke 81 when the terminal plate 50J is fixed to the end surface 81a of the split yoke 81. Therefore, according to Fig.23 The structure shown in FIG. 1 ensures insulation between the split yoke 81 and the terminal portion 52a. Fig.23 In the structure shown, when one end portion 41a of the winding 41 is electrically connected to a terminal of a wiring substrate as described later, for example, by soldering, the heat generated during soldering is difficult to transfer from the terminal portion 52a to the split yoke 81, and as a result, it is difficult to damage the split iron core 80A, thereby suppressing a reduction in the strength of the coil unit 70J (more specifically, the split iron core 80A).

[0275] In the coil unit 70J, Fig.23 Similarly, in the terminal plate 50J, the terminal portion 52 b does not penetrate the plate portion 51 in the axial direction.

[0276] In coil unit 70J, in terminal plate 50J, at least one of terminal portion 52a and terminal portion 52b may not axially penetrate plate portion 51, or only one of terminal portion 52a and terminal portion 52b may not axially penetrate plate portion 51.

[0277] For example, in the terminal plate 50J, when the terminal portion 52 b does not penetrate the plate portion 51 in the axial direction, the terminal portion 52 a may penetrate the plate portion 51 in the axial direction.

[0278] Fig.24 It means along Fig.21 2 is a schematic cross-sectional view of another example of the cross section of the line segment c1 - c2 of the coil unit shown.

[0279] exist Fig.24 In the terminal plate 50J shown, the terminal portion 52a penetrates the plate portion 51 in the axial direction.

[0280] like Fig.24 As shown, the bottom of the terminal portion 52a may also be a shape that is radially expanded compared to other portions. In addition, in the terminal plate 50J, the bottom of the terminal portion 52a may also be a shape that is circumferentially expanded compared to other portions. That is, in the terminal plate 50J, the bottom of the terminal portion 52a may also be a shape that is radially expanded compared to other portions and in at least one of the circumferential directions. In this way, the bottom of the terminal portion 52a is an expanded shape, so that the terminal portion 52a is difficult to fall off from the plate portion 51 in the axial direction.

[0281] like Fig.24 As shown, the terminal portion 52a may be separated from the end face 81a of the split yoke 81 in the axial direction. In other words, a cavity 88 may be provided between the terminal portion 52a and the split yoke 81. In this case, even if the terminal portion 52a passes through the plate portion 51 in the axial direction, it is possible to provide a structure in which the terminal portion 52a does not contact the split yoke 81 when the terminal plate 50J is fixed to the end face 81a of the split yoke 81. Therefore, according to Fig.24 The structure shown in FIG. 1 ensures insulation between the split yoke 81 and the terminal portion 52a. Fig.24In the structure shown, when one end portion 41a of the winding 41 is electrically connected to a terminal of a wiring substrate as described later, for example, by soldering, the heat generated during soldering is difficult to transfer from the terminal portion 52a to the split yoke 81, and as a result, it is difficult to damage the split iron core 80A, thereby suppressing a reduction in the strength of the coil unit 70J (more specifically, the split iron core 80A).

[0282] In addition, in other coil units such as the coil unit 70A, the terminal portion may not penetrate the plate portion in the axial direction.

[0283] <Implementation method 7>

[0284] In the above embodiment, the terminal plate has two terminal parts, but in the stator of the present invention, the terminal plate may have only one terminal part. That is, in the stator of the present invention, only one end of the winding may be fixed in a state of being wound around the terminal part. In this regard, a stator in a manner different from the stator of the fourth embodiment of the present invention is described below as a stator of the seventh embodiment of the present invention.

[0285] Fig.25 It is a perspective schematic diagram showing an example of a stator according to Embodiment 7 of the present invention. Fig.26 Yes means Fig.25 A three-dimensional schematic diagram of the coil unit in FIG.

[0286] Fig.25 The stator 20K shown has a coil unit 70K.

[0287] Fig.26 The coil unit 70K shown includes a split core 80G, a coil 40A, and a terminal block 50K.

[0288] The split core 80G included in the coil unit 70K has the same structure as the split core 80G included in the coil unit 70G.

[0289] The terminal plate 50K has a plate portion 51 and a terminal portion 52 a .

[0290] One end portion 41a of the winding 41 is fixed in a state of being wound around the terminal portion 52a. Thus, one end portion 41a of the winding 41 is led out to the terminal block 50K.

[0291] In the stator 20K, the coil unit 70K is used when the windings 41 of the plurality of coils 40A are connected in series, for example. Fig.25As shown, the stator 20K may have a coil unit 71K in which both ends of the winding 41 are not led out to the terminal board in addition to the coil unit 70K. That is, in the stator 20K, the coil unit 70K in which one end 41a of the winding 41 is led out to the terminal board and the coil unit 71K in which both ends of the winding 41 are not led out to the terminal board may be mixed.

[0292] In addition, in other coil units such as coil unit 70A, the terminal plate may have only one terminal portion.

[0293] In the above embodiment, the stator core is divided into split cores and has a split structure. However, in the stator of the present invention, the stator core may be an integrated structure that is not divided.

[0294] According to the stator with a split stator core structure, the coils 40A can be arranged more closely than in a stator with a single-piece stator core structure, and as a result, the number of coils 40A can be increased. Therefore, according to the stator with a split stator core structure, it is easier to improve the characteristics of the motor than in a stator with a single-piece stator core structure.

[0295] The stator of the present invention can be used not only as a component of a motor described below, but also as a component of a generator, for example.

[0296] [motor]

[0297] A motor according to the present invention is characterized by comprising the stator according to the present invention and a rotor provided so as to face the inner peripheral surface of the stator.

[0298] <Implementation method 8>

[0299] An example of the motor of the present invention will be described as a motor according to Embodiment 8 of the present invention.

[0300] Fig. 27 It is a perspective schematic diagram showing an example of a motor according to an eighth embodiment of the present invention.

[0301] Fig. 27 The motor 1A shown has a rotor 10A and a stator 20A.

[0302] In the motor 1A, the rotor 10A is located on the inner side of the coaxial axis AX and the stator 20A is located on the outer side of the coaxial axis AX. The axis AX corresponds to the rotation axis of the rotor 10A.

[0303] The rotor 10A is provided so as to face the inner circumferential surface of the stator 20A.

[0304] The rotor 10A includes, for example, a rotor yoke 11 , a shaft 12 , and a permanent magnet 13 .

[0305] The rotor yoke 11 is made of, for example, a bulk soft magnetic body, an electromagnetic steel plate, a powder core, a resin molded body containing a soft magnetic material, or the like.

[0306] The shaft 12 is inserted through the rotor yoke 11 .

[0307] Examples of the constituent material of the shaft 12 include metals such as stainless steel.

[0308] The direction in which the shaft 12 extends, that is, the direction in which the axis AX extends is parallel to the axial direction.

[0309] The permanent magnets 13 are provided so that N poles and S poles are alternately arranged along the outer peripheral surface of the rotor yoke 11 .

[0310] When viewed from the axial direction, the rotor 10A may be substantially circular or substantially polygonal.

[0311] In the present embodiment, a motor including the stator 20A in which a plurality of coil units 70A are arranged in a ring shape in the circumferential direction is shown, but the same applies to a motor including a stator in which other coil units such as the coil unit 70B are arranged in a ring shape in the circumferential direction.

[0312] <Implementation method 9>

[0313] The motor of the present invention may further include a connection substrate electrically connected to one end of the winding. In this regard, a motor of a different form from the motor of the eighth embodiment of the present invention will be described below as a motor of the ninth embodiment of the present invention.

[0314] Fig.28 It is a perspective schematic diagram showing an example of a motor according to a ninth embodiment of the present invention.

[0315] Fig.28 The motor 1B shown includes a wiring substrate 25A in addition to the rotor 10A and the stator 20A.

[0316] The connection substrate 25A is electrically connected to one end 41a of the winding 41 of the coil 40A of the stator 20A. Preferably, the connection substrate 25A is electrically connected to the other end 41b of the winding 41 of the coil 40A of the stator 20A. An example of this connection method is described below.

[0317] The wiring substrate 25A is provided with a plurality of through holes 26 penetrating in the axial direction so as to be separated from each other in the circumferential direction.

[0318] In the wiring substrate 25A, terminals (not shown) are exposed on the inner wall surface of each through hole 26 .

[0319] In the motor 1B, the wiring substrate 25A is placed on the stator 20A so that the terminal portion 52a and the terminal portion 52b pass through the respective through holes 26. On the other hand, the one end portion 41a of the winding 41 is fixed in a state of being wound around the terminal portion 52a, and the other end portion 41b of the winding 41 is fixed in a state of being wound around the terminal portion 52b. Therefore, as described above, according to the state in which the wiring substrate 25A is placed on the stator 20A, the one end portion 41a of the winding 41 wound around the terminal portion 52a and the other end portion 41b of the winding 41 wound around the terminal portion 52b can be efficiently connected to the terminals exposed from the inner wall surfaces of the respective through holes 26. Therefore, according to the motor 1B, the electrical connection between the one end portion 41a of the winding 41 and the terminal of the wiring substrate 25A and the electrical connection between the other end portion 41b of the winding 41 and the terminal of the wiring substrate 25A can be easily achieved.

[0320] The following contents are disclosed in this specification.

[0321] <1> A stator, characterized by comprising:

[0322] The stator core has an annular yoke along the circumferential direction and teeth protruding from the inner circumference of the yoke in the radial direction of the yoke, and is composed of a molded body of magnetic powder;

[0323] a coil composed of a winding wound around the teeth; and

[0324] a terminal plate fixed to an end surface of the yoke in the axial direction of the stator core,

[0325] The terminal plate comprises a plate portion and a terminal portion fixed to the plate portion.

[0326] The plate portion has a first main surface located on the end surface side of the yoke and a second main surface located on the opposite side of the end surface of the yoke in the axial direction.

[0327] The terminal portion protrudes from at least the second main surface of the plate portion in the axial direction.

[0328] One end of the winding is fixed in a state of being wound around the terminal portion.

[0329] <2> The stator according to <1>, wherein:

[0330] The end surface of the yoke and the first main surface of the plate portion are fitted together via a fitting portion.

[0331] <3> The stator according to <2>, wherein:

[0332] The fitting portion is formed by fitting a protrusion protruding from one direction of the end surface of the yoke and the first main surface of the plate portion in the axial direction and a recessed portion recessed from the other direction of the end surface of the yoke and the first main surface of the plate portion in the axial direction.

[0333] <4> The stator according to <3>, wherein:

[0334] The fitting portion overlaps with a peripheral edge of the end surface of the yoke and a peripheral edge of the first main surface of the plate portion in the axial direction.

[0335] <5> The stator according to <3> or <4>, wherein:

[0336] The fitting portion includes a first fitting portion and a second fitting portion located on the inner side of the first fitting portion in the radial direction.

[0337] <6> The stator according to <5>, wherein:

[0338] The fitting portion further includes a third fitting portion that is located on the inner side of the first fitting portion in the radial direction and is separated from the second fitting portion in the circumferential direction.

[0339] <7> The stator according to any one of <4> to <6>, wherein:

[0340] The winding extends toward the terminal portion so as to contact the protrusion at one end side.

[0341] <8> The stator according to <3>, wherein:

[0342] The fitting portion overlaps the terminal portion in the axial direction.

[0343] <9> The stator according to <8>, wherein:

[0344] The convex portion is configured to protrude from the first main surface of the plate portion in the axial direction.

[0345] The recessed portion is provided so as to be recessed from the end surface of the yoke in the axial direction.

[0346] <10> The stator according to <2>, wherein:

[0347] The fitting portion is formed by fitting the plate portion with a recessed portion recessed from the end surface of the yoke in the axial direction.

[0348] <11> The stator according to any one of <1> to <10>, wherein:

[0349] A winding recess is provided at the periphery of the second main surface of the plate portion when viewed from the axial direction.

[0350] The winding extends toward the terminal portion so as to pass through the winding recess at one end side.

[0351] <12> The stator according to any one of <1> to <11>, wherein:

[0352] The end surface of the yoke and the first main surface of the plate portion are joined.

[0353] <13> The stator according to any one of <1> to <12>, wherein:

[0354] The end surface of the yoke is provided with a recess overlapping the terminal portion in the axial direction.

[0355] The terminal portion is separated from the bottom surface of the recess in the axial direction.

[0356] <14> The stator according to any one of <1> to <13>, wherein:

[0357] The terminal portion does not penetrate the plate portion in the axial direction.

[0358] <15> The stator according to any one of <1> to <14>, wherein:

[0359] In the radial direction, the inner end of the terminal plate is not located inside the inner end of the yoke.

[0360] <16> The stator according to any one of <1> to <15>, wherein:

[0361] The plurality of coil units are arranged in a ring shape along the circumferential direction.

[0362] Each of the plurality of coil units independently includes a split core obtained by splitting the stator core in the circumferential direction, the coil, and the terminal plate.

[0363] <17> The stator according to any one of <1> to <16>, wherein:

[0364] The stator core is composed of a powder magnetic core.

[0365] <18> The stator according to any one of <1> to <17>, wherein:

[0366] The terminal portion is made of a conductive material.

[0367] <19> A motor, characterized in that it comprises:

[0368] The stator according to any one of <1> to <18>; and

[0369] A rotor is disposed opposite to the inner circumferential surface of the stator.

[0370] <20> The motor according to <19>, wherein:

[0371] A wiring substrate is further provided, and the wiring substrate is electrically connected to one end of the winding.

[0372] Description of Reference Numerals

[0373] 1A, 1B…motor; 10A…rotor; 11…rotor yoke; 12…shaft; 13…permanent magnet; 20A, 20K…stator; 25A…substrate for connection; 26…through hole; 30A…stator core; 31…yoke; 31a…end face of yoke; 32…tooth; 40A…coil; 41…winding; 41a…one end of winding; 41b…the other end of winding; 50A, 50B, 50C, 50D, 50E, 50G, 50J, 50K…terminal board; 51…plate portion; 51a…first main surface of plate portion; 51b…second main surface of plate portion; 52a, 52b…terminal portion; 55a, 55b, 55c, 55d, 55e…convex portion of plate portion; 56a, 56b, 56c…concave portion of plate portion; 57a…concave portion for winding : 70A, 70B, 70C, 70D, 70E, 70F, 70G, 70H, 70J, 70K, 71K…coil unit; 80A, 80B, 80C, 80D, 80E, 80F, 80G, 80H…split core; 81…split yoke; 81a…end face of split yoke; 85a, 85b, 85c…convex portion of split yoke; 86a, 86b, 86c, 86d, 86e, 86f…concave portion of split yoke; 87a, 87b…depression of split yoke; 88…void; 90A, 90B, 90C, 90D, 90E, 90F, 90aa, 90ab, 90ba, 90bb, 90ca, 90cb, 90da, 90ea, 90fa…fitting portion; AX…axis line.

Claims

1. A stator, characterized in that: have: The stator core has an annular yoke along the circumferential direction and teeth protruding from the inner circumference of the yoke in the radial direction of the yoke, and is composed of a molded body of magnetic powder; a coil composed of a winding wound around the teeth; and a terminal plate fixed to an end surface of the yoke in the axial direction of the stator core, The terminal plate comprises a plate portion and a terminal portion fixed to the plate portion. The plate portion has a first main surface located on the end surface side of the yoke and a second main surface located on the opposite side of the end surface of the yoke in the axial direction. The terminal portion protrudes from at least the second main surface of the plate portion in the axial direction. One end of the winding is fixed in a state of being wound around the terminal portion.

2. The stator according to claim 1, wherein: The end surface of the yoke and the first main surface of the plate portion are fitted together via a fitting portion.

3. The stator according to claim 2, wherein: The fitting portion is formed by fitting a protrusion protruding from one direction of the end surface of the yoke and the first main surface of the plate portion in the axial direction and a recessed portion recessed from the other direction of the end surface of the yoke and the first main surface of the plate portion in the axial direction.

4. The stator according to claim 3, wherein: The fitting portion overlaps with a peripheral edge of the end surface of the yoke and a peripheral edge of the first main surface of the plate portion in the axial direction.

5. The stator according to claim 3 or 4, wherein: The fitting portion includes a first fitting portion and a second fitting portion located on the inner side of the first fitting portion in the radial direction.

6. The stator according to claim 5, wherein: The fitting portion further includes a third fitting portion that is located on the inner side of the first fitting portion in the radial direction and is separated from the second fitting portion in the circumferential direction.

7. The stator according to any one of claims 4 to 6, wherein: The winding extends toward the terminal portion so as to contact the protrusion at one end side.

8. The stator according to claim 3, wherein: The fitting portion overlaps the terminal portion in the axial direction.

9. The stator according to claim 8, wherein: The convex portion is configured to protrude from the first main surface of the plate portion in the axial direction. The recessed portion is provided so as to be recessed from the end surface of the yoke in the axial direction.

10. The stator according to claim 2, wherein: The fitting portion is formed by fitting the plate portion with a recessed portion recessed from the end surface of the yoke in the axial direction.

11. The stator according to any one of claims 1 to 10, wherein: A winding recess is provided at the periphery of the second main surface of the plate portion when viewed from the axial direction. The winding extends toward the terminal portion so as to pass through the winding recess at one end side.

12. The stator according to any one of claims 1 to 11, wherein: The end surface of the yoke and the first main surface of the plate portion are joined.

13. The stator according to any one of claims 1 to 12, wherein: The end surface of the yoke is provided with a recess overlapping the terminal portion in the axial direction. The terminal portion is separated from the bottom surface of the recess in the axial direction.

14. The stator according to any one of claims 1 to 13, wherein: The terminal portion does not penetrate the plate portion in the axial direction.

15. The stator according to any one of claims 1 to 14, wherein: In the radial direction, the inner end of the terminal plate is not located inside the inner end of the yoke.

16. The stator according to any one of claims 1 to 15, wherein: The plurality of coil units are arranged in a ring shape along the circumferential direction. Each of the plurality of coil units independently includes a split core obtained by splitting the stator core in the circumferential direction, the coil, and the terminal plate.

17. The stator according to any one of claims 1 to 16, wherein: The stator core is composed of a powder core.

18. The stator according to any one of claims 1 to 17, wherein: The terminal portion is made of a conductive material.

19. A motor, characterized in that: have: The stator according to any one of claims 1 to 18; and A rotor is disposed opposite to the inner circumferential surface of the stator.

20. The motor according to claim 19, wherein A wiring substrate is further provided, and the wiring substrate is electrically connected to one end of the winding.

Images