Stator or motor

Abstract

To improve motor manufacturing efficiency.SOLUTION: A conductive member 40 includes at least two coil wires 41 to 43 and 51. Each of the coil wires 41 to 43, 51 includes lead wire portions 44 to 46, 52 and coil portions 47 to 49, 53 that extend (or branch) from the lead wire portions 44 to 46, 52 and are spirally formed. Coils 57 to 59 are formed by electrically connecting the tip of a coil portion 53 of one coil wire 51 and the tip of coil portions 47 to 49 of the other coil wires 41 to 43.SELECTED DRAWING: Figure 3

Description

Technical Field

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[0001] The present disclosure relates to a stator, a motor, a conductive member, a method for manufacturing the conductive member, and a method for manufacturing the stator.

Background Art

[0002] For example, motors such as those disclosed in Patent Document 1 are used in various fields. The motor includes a coil formed by winding a conductive wire.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In response to the recent increasing demand for motors, it is desired to improve the manufacturing efficiency of motors. In particular, the operation of winding a conductive wire to form a coil requires a lot of time and, as a result, a lot of labor.

[0005] An embodiment of the present disclosure aims to improve the manufacturing efficiency of a motor.

Means for Solving the Problems

[0006] A stator according to an embodiment of the present disclosure includes a stator core including an annular core back and first teeth extending radially inward from the core back, a first power supply side coil wire to which power is supplied from a power supply unit, a non-power supply side coil wire, and is provided with The first power supply coil wire includes a first power supply routing section that is routed circumferentially as a whole, and a first power supply coil section that extends (or branches off) from the first power supply routing section and is formed in a spiral shape to wind around the first teeth, The non-powered coil wire includes a non-powered routing portion that is routed circumferentially as a whole, and a first non-powered coil portion that extends (or branches off) from the non-powered routing portion and is formed in a spiral shape to wind around the first teeth, The first coil is formed by electrically connecting the tip of the first power supply side coil and the tip of the first non-power supply side coil.

[0007] In a stator according to one embodiment of the present disclosure, The first power supply coil wire and the non-power supply coil wire may be in the form of plates.

[0008] In a stator according to one embodiment of the present disclosure, The stator may further include a second power supply coil wire to which power is supplied from the power supply unit. The stator core may further include second teeth that are aligned circumferentially with the first teeth and extend radially inward from the core back. The second power supply coil wire may include a second power supply routing portion that is routed circumferentially as a whole, and a second power supply coil portion that extends (or branches off) from the second power supply routing portion and is formed in a spiral shape to wind around the second teeth. The non-powered coil wire may further include a second non-powered coil portion that extends (or branches off) from the non-powered routing portion and is formed in a spiral shape to wind around the second teeth. A second coil may be formed by connecting the tip of the second power supply side coil portion and the tip of the second non-power supply side coil portion.

[0009] In a stator according to one embodiment of the present disclosure, The second power supply coil wire and the non-power supply coil wire may be in the form of plates.

[0010] In a stator according to one embodiment of the present disclosure, The first coil and the second coil may be located between the first power supply side wiring section and the second power supply side wiring section.

[0011] In a stator according to one embodiment of the present disclosure, The stator may further include a third power supply coil wire to which power is supplied from the power supply unit. The stator core may further include a third tooth that is circumferentially aligned with the first and second teeth and extends radially inward from the core back. The third power supply coil wire may include a third power supply routing portion that is routed circumferentially as a whole, and a third power supply coil portion that extends (or branches off) from the third power supply routing portion and is formed in a spiral shape to wind around the third teeth. The non-powered coil wire may further include a third non-powered coil portion that extends (or branches off) from the non-powered routing portion and is formed in a spiral shape, winding around the third teeth. A third coil may be formed by connecting the tip of the third power supply side coil portion and the tip of the third non-power supply side coil portion.

[0012] In a stator according to one embodiment of the present disclosure, The third power supply coil wire and the non-power supply coil wire may be in the form of plates.

[0013] In a stator according to one embodiment of the present disclosure, The first coil, the third coil, and the second coil may be arranged in this order along the circumferential direction between the first power supply side wiring section and the second power supply side wiring section, which extend along the circumferential direction. The third power supply side lead wire portion may include a portion extending on the side of the second power supply side lead wire portion rather than the first coil and the third coil, a portion extending between the third coil and the second coil, and a portion extending on the side of the first power supply side lead wire portion rather than the second coil.

[0014] A motor according to an embodiment of the present disclosure includes the stator described above.

[0015] A conductive member according to an embodiment of the present disclosure includes at least two coil wires, each coil wire includes a lead wire portion and a coil portion extending (or branching) from the lead wire portion and formed in a spiral shape, a coil is formed by electrically connecting the tip of the coil portion of one coil wire to the tip of the coil portion of the other coil wire.

[0016] In the conductive member according to an embodiment of the present disclosure, the coil wire may be plate-shaped.

[0017] A method for manufacturing a conductive member according to an embodiment of the present disclosure includes a step of producing at least two coil wires each including a lead wire portion and a coil portion extending (or branching) from the lead wire portion and formed in a spiral shape, and a step of forming a coil by electrically connecting the tip of the coil portion of one coil wire to the tip of the coil portion of the other coil wire. and is provided with.

[0018] In the method for manufacturing a conductive member according to an embodiment of the present disclosure the at least two coil wires may be produced by etching or punching a metal foil or a metal plate.

[0019] In the method for manufacturing a conductive member according to an embodiment of the present disclosure The aforementioned other coil wires may include the first coil wire and the second coil wire. The first coil wire and the second coil wire are The routing section of the first coil wire and the routing section of the second coil wire are spaced apart from each other and extend parallel to each other along the first direction, and The coil portion of the first coil wire and the coil portion of the second coil wire are aligned along the first direction between the routing portion of the first coil wire and the routing portion of the second coil wire. The aforementioned metal foil or metal plate may be manufactured by etching or punching.

[0020] In a method for manufacturing a conductive member according to one embodiment of the present disclosure, The aforementioned other coil wires may include a first coil wire, a second coil wire, and a third coil wire. The first coil wire, the second coil wire, and the third coil wire are, The routing portion of the first coil wire and the routing portion of the second coil wire are spaced apart from each other and extend parallel to each other along the first direction, and The coil portion of the first coil wire, the coil portion of the third coil wire, and the coil portion of the second coil wire are arranged in this order along the first direction between the routing portion of the first coil wire and the routing portion of the second coil wire, and The routing portion of the third coil wire is such that it has a portion extending between the coil portion of the first coil wire and the coil portion of the third coil wire and the routing portion of the second coil wire, a portion extending between the coil portion of the third coil wire and the coil portion of the second coil wire, and a portion extending between the coil portion of the second coil wire and the routing portion of the first coil wire. The aforementioned metal foil or metal plate may be manufactured by etching or punching.

[0021] A method for manufacturing a stator according to one embodiment of the present disclosure is: A step of preparing a stator core including an annular core back and teeth extending radially inward from the core back, A step of manufacturing the conductive member by the manufacturing method described above, The steps include inserting the teeth of the stator core into the coil of the conductive member, It is equipped with. [Effects of the Invention]

[0022] According to the present invention, the manufacturing efficiency of motors can be improved. [Brief explanation of the drawing]

[0023] [Figure 1] Figure 1 is a schematic diagram showing a cross-section along the axial direction of a motor according to one embodiment. [Figure 2] Figure 2 is a schematic diagram showing a cross-section of a stator perpendicular to the axial direction in one embodiment. [Figure 3] Figure 3 is a schematic diagram showing the conductive member mounted on the stator shown in Figure 2. [Figure 4] Figure 4 is a diagram illustrating the manufacturing method of the power supply coil wire. [Figure 5] Figure 5 is a diagram illustrating the manufacturing method of the non-powered coil wire. [Figure 6] Figure 6 is a diagram illustrating a method for manufacturing a conductive member. [Figure 7] Figure 7 is a plan view showing the additional coil section. [Figure 8] Figure 8 is a diagram illustrating a modified method for connecting the coil section. [Figure 9A] Figure 9A is a diagram illustrating another variation of the coil connection method. [Figure 9B] Figure 9B is a diagram illustrating another variation of the coil connection method. [Figure 10A] Figure 10A illustrates yet another variation of the coil connection method. [Figure 10B]Figure 10B illustrates yet another variation of the coil connection method. [Modes for carrying out the invention]

[0024] Hereinafter, an embodiment of the present disclosure will be described with reference to the drawings. Note that, for the sake of illustration and ease of understanding, the scale and aspect ratios of the drawings attached to this specification have been appropriately altered and exaggerated from those of the actual objects.

[0025] Furthermore, in this specification, terms such as "sheet," "film," and "plate" are not distinguished from each other solely based on differences in name. Therefore, for example, "sheet" is a concept that includes components that could also be called films or plates.

[0026] Furthermore, in this specification, "sheet surface (plate surface, film surface)" refers to the surface that coincides with the planar direction (surface direction) of the sheet-like member in question when viewed as a whole and in a broad sense. Moreover, in this specification, the normal direction of the sheet-like member refers to the direction normal to the sheet surface of the sheet-like member in question.

[0027] Figure 1 is a schematic longitudinal cross-sectional view showing the overall structure of a motor 1 to which a conductive member 40 according to one embodiment is applied. In the illustrated example, the motor 1 is a three-phase AC motor. Also, in the illustrated example, it is an inner rotor type motor. However, the motor 1 to which the conductive member 40 is applied is not limited to this. Any motor to which the conductive member 40 can be applied may be used.

[0028] In this specification, for the sake of explanation, the direction in which the rotation axis Ax of the motor extends is referred to as the "axial direction." Furthermore, the direction of the radius of a circle drawn on a plane perpendicular to the rotation axis Ax, with any point on the rotation axis Ax as the center, is referred to as the "radial direction," and the circumferential direction of that circle is referred to as the "circumferential direction."

[0029] <<<Motor>>> Motor 1 comprises a rotor 10, a stator 20, and a housing 30. The rotor 10 rotates relative to the stator 20 about the rotation axis Ax of the motor 1. The stator 20 is annular in shape and surrounds the rotor 10. The housing 30 houses the rotor 10 and the stator 20.

[0030] <<Housing>> The housing 30 is cylindrical in shape as a whole. The housing 30 is provided with a pair of bearings 31 and 32. The pair of bearings 31 and 32 are spaced apart from each other in the axial direction.

[0031] <<Rotor>> The rotor 10 includes a cylindrical shaft 11, a rotor core 12, and at least one magnet 13. The shaft 11 is the axis of rotation of the rotor 10 and extends along the axial direction. The shaft 11 is rotatably supported about the axis of rotation Ax by a pair of bearings 31, 32.

[0032] The rotor core 12 has a through hole 12a that extends in the axial direction. The through hole 12a is formed in the center of the rotor core 12 when viewed in the axial direction. The shaft 11 is inserted through the through hole 12a. The rotor core 12 is fixed to the shaft 11 and rotates together with the shaft 11.

[0033] The magnet 13 is fixed to the outer circumferential surface of the rotor core 12. The magnet 13 faces radially opposite the inner circumferential surface of the stator 20. In the illustrated example, the rotor 10 has multiple magnets 13. The multiple magnets 13 are arranged along the circumferential direction. The multiple magnets 13 are arranged such that magnets with north poles on the radially outer side and magnets with south poles on the radially outer side are arranged alternately.

[0034] <<Status>> The stator 20 includes a stator core 21 and a conductive member 40 mounted on the stator core 21. As will be described later, a portion of the conductive member 40 forms coils 57 to 59.

[0035] The stator core 21 is annular in shape as shown in Figure 2. The stator core 21 is positioned to surround the rotor 10. The stator core 21 has a core back 22 and teeth 23.

[0036] The core back 22 is formed in a substantially annular shape with respect to the rotation axis Ax. The core back 22 is fixed to the inner circumferential surface of the housing 30.

[0037] The teeth 23 extend radially inward from the core back 22. The teeth 23 are radially opposite to the magnets 13 of the rotor 10. In the illustrated example, the stator core 21 has six teeth 23a to 23f. The multiple teeth 23a to 23f are arranged at equal intervals along the circumferential direction. Coils 57 to 59, formed by conductive members 40, are wound around each tooth 23a to 23f.

[0038] In the following, of the six teeth 23a to 23f, teeth 23a and 23d, which are wound around the first power supply coil section 47 described later, will also be referred to as the "first teeth." Also, of the six teeth 23a to 23f, teeth 23b and 23e, which are wound around the second power supply coil section 48 described later, will also be referred to as the "second teeth." Also, of the six teeth 23a to 23f, teeth 23c and 23f, which are wound around the third power supply coil section 49 described later, will also be referred to as the "third teeth."

[0039] In the illustrated example, one third tooth 23c and one second tooth 23b are arranged in this order clockwise along Figure 2, between two first teeth 23a and 23d. Also, one second tooth 23b and one first tooth 23d are arranged in this order clockwise along Figure 2, between two third teeth 23c and 23f. Furthermore, one first tooth 23d and one third tooth 23f are arranged in this order clockwise along Figure 2, between two second teeth 23b. In other words, teeth 23a, 23c, 23b, 23d, 23f, and 23e are arranged in this order along the circumferential direction.

[0040] <Conductive material> The conductive member 40 includes at least two coil wires 41-43, 51. Each coil wire 41-43, 51 is in the form of a plate. The coil wires 41-43, 51 can be formed by etching or punching out metal foil or metal plates such as copper foil or copper plates. By forming the coil wires 41-43, 51 in this way, the coil wires 41-43, 51 can be made thinner, and the thickness of the coils 57-59 and the stator 20 can be reduced. This makes it possible to miniaturize the stator 20 (and therefore the motor 1). When the coil wires 41-43, 51 are formed from metal foil, their thickness is, for example, 0.2 mm to 1.0 mm.

[0041] The conductive member 40 includes power supply side coil wires 41-43 to which power is supplied from a power supply unit (not shown), and a non-power supply side coil wire 51. The non-power supply side coil wire 51 is electrically connected to the power supply side coil wires 41-43. In other words, a connection part 50 is formed between the power supply side coil wires 41-43 and the non-power supply side coil wire 51 to electrically connect them (see Figure 3).

[0042] In the illustrated example, the conductive member 40 includes three power supply coil wires (first to third power supply coil wires 41 to 43) and one non-power supply coil wire 51. A sheet-like insulating layer 60 is placed between the first to third power supply coil wires 41 to 43 and the non-power supply coil wire 51. The insulating layer 60 has an opening 61 through which the first to third power supply coil wires 41 to 43 and the non-power supply coil wire 51 are connected (see Figure 6).

[0043] Figure 3 is a schematic diagram showing conductive members 40 mounted on teeth 23a to 23f. In Figure 3, the left-right direction corresponds to the circumferential direction. In the example shown in Figure 3, the first to third power supply side coil wires 41 to 43 are shown as dashed lines, dashed lines, and double-dotted lines, respectively. The non-power supply side coil wire 51 is shown as a solid line. The connection points 50 between each power supply side coil wire 41 to 43 and the non-power supply side coil wire 51 are shown as black circles.

[0044] As shown in Figure 3, each power supply coil wire 41-43 includes a circumferentially routed wire section 44-46 and a coil section 47-49 that extends (or branches off) from the circumferential wire sections 44-46 and is formed in a spiral shape. In Figure 3, for ease of illustration, the number of turns of the spiral coil sections 47-49 is shown as less than 1, but the number of turns of the coil sections 47-49 is not limited to the number of turns shown in Figure 3. The number of turns of the coil sections 47-49 may be any number. For example, the number of turns of the coil sections 47-49 may be 1 or more, 2 or more, 3 or more, 4 or more, 5 or more, 6 or more, or 7 or more.

[0045] Hereafter, the routing section 44 and coil section 47 of the first power supply coil wire 41 will also be referred to as the "first power supply routing section" and the "first power supply coil section," respectively. Similarly, the routing section 45 and coil section 47 of the second power supply coil wire 42 will also be referred to as the "second power supply routing section" and the "second power supply coil section," respectively. Furthermore, the routing section 46 and coil section 49 of the third power supply coil wire 43 will also be referred to as the "third power supply routing section" and the "third power supply coil section," respectively.

[0046] As shown in Figure 3, the first power supply coil section 47 is attached to the first teeth 23a and 23d and wound around them. The second power supply coil section 48 is attached to the second teeth 23b and 23e and wound around them. The third power supply coil section 49 is attached to the third teeth 23c and 23f and wound around them.

[0047] In the illustrated example, the first power supply coil wire 41 has multiple (in this case, two) first power supply coil sections 47a, 47b. The first power supply coil sections 47a, 47b are wound around the first teeth 23a, 23d, respectively. The second power supply coil wire 42 has multiple (in this case, two) second power supply coil sections 48a, 48b. The second power supply coil sections 48a, 48b are wound around the second teeth 23b, 23e, respectively. The third power supply coil wire 43 has multiple (in this case, two) third power supply coil sections 49a, 49b. The third power supply coil sections 49a, 49b are wound around the third teeth 23c, 23f, respectively.

[0048] In Figure 3, the left end of each power supply side routing section 44-46 is connected to a power supply unit such as a power supply device via a busbar or the like.

[0049] The first to third power supply coil wires 41 to 43 can be efficiently manufactured simultaneously from a single metal foil M1 or metal plate by, for example, the following method. That is, the contours of the first to third power supply coil wires 41 to 43 are determined as shown in Figure 4, and the metal foil M1 or metal plate is etched or punched along these contours.

[0050] In the example shown in Figure 4, the first power supply side wiring section 44 and the second power supply side wiring section 45 are spaced apart from each other and extend parallel to each other along the first direction D1.

[0051] Furthermore, in the example shown in Figure 4, the first power supply coil section 47, the third power supply coil section 49, and the second power supply coil section 48 are arranged in this order along the first direction D1 between the first power supply wiring section 44 and the second power supply wiring section 45. In the illustrated example, the power supply coil sections 47a, 49a, 48a, 47b, 49b, and 48b are arranged in this order along the first direction D1 between the first power supply wiring section 44 and the second power supply wiring section 45.

[0052] Furthermore, in the example shown in Figure 4, the third power supply side routing section 46 has a portion 461 extending between the first power supply side coil section 47a and the third power supply side coil section 49a and the second power supply side routing section 45, a portion 462 extending between the third power supply side coil section 49a and the second power supply side coil section 48a, and a portion 463 extending between the second power supply side coil section 48a and the first power supply side routing section 44. Furthermore, the third power supply side routing section 45 has a portion 464 extending between the second power supply side coil section 48a and the first power supply side coil section 47b, a portion 465 extending between the first power supply side coil section 47b and the third power supply side coil section 49b and the second power supply side routing section 45, a portion 466 extending between the third power supply side coil section 49b and the second power supply side coil section 48b, and a portion 467 extending between the second power supply side coil section 48b and the first power supply side routing section 44.

[0053] By determining the outlines of the first to third power supply coil wires 41 to 43 in this way, the first to third power supply coil wires 41 to 43, separated from each other, can be manufactured from a single metal foil M1 or metal plate. The first power supply routing section 44 and the first power supply coil section 47 are formed integrally. The second power supply routing section 45 and the second power supply coil section 48 are formed integrally. The third power supply routing section 46 and the third power supply coil section 49 are formed integrally.

[0054] Furthermore, the first to third power supply side coil sections 47 to 49 are formed in a spiral shape. This eliminates the need to wind the coil wires 41 to 43 to form coils 57 to 59, as will be described later. The winding direction of the spiral first to third power supply side coil sections 47 to 49 is the same for all of them.

[0055] The non-powered coil wire 51 includes a routing section 52 that is routed circumferentially as a whole, and a coil section 53 that extends (or branches off) from the routing section 52 and is formed in a spiral shape. Hereinafter, the routing section 52 and the coil section 53 of the non-powered coil wire 51 will also be referred to as the "non-powered routing section" and the "non-powered coil section," respectively.

[0056] The non-powered coil section 53 is electrically connected at its tip to the corresponding tips of the powered coil sections 47 to 49 of the powered coil wires 41 to 43. In the illustrated example, the non-powered coil wire 51 has a plurality of non-powered coil sections 54 to 56. Specifically, the non-powered coil wire 51 has a coil section 54 connected to the first powered coil section 47, a coil section 55 connected to the second powered coil section 48, and a coil section 56 connected to the third powered coil section 49.

[0057] Hereafter, the non-powered coil section 54 connected to the first powered coil section 47 will also be referred to as the "first non-powered coil section." The non-powered coil section 55 connected to the second powered coil section 48 will also be referred to as the "second non-powered coil section." The non-powered coil section 56 connected to the third powered coil section 49 will also be referred to as the "third non-powered coil section."

[0058] As shown in Figure 3, the first non-powered coil section 54 is wound around the first teeth 23a and 23d. The second non-powered coil section 55 is wound around the second teeth 23b and 23e. The third non-powered coil section 56 is wound around the third teeth 23c and 23f.

[0059] In the illustrated example, the non-powered coil wire 51 has a plurality of (in this case, two) first non-powered coil sections 54a, 54b, a plurality of (in this case, two) second non-powered coil sections 55a, 55b, and a plurality of (in this case, two) third non-powered coil sections 56a, 56b. The first non-powered coil sections 54a, 54b are wound around the first teeth 23a, 23d, respectively. The second non-powered coil sections 55a, 55b are wound around the second teeth 23b, 23e, respectively. The third non-powered coil sections 56a, 56b are wound around the third teeth 23c, 23f, respectively.

[0060] In Figure 3, the right end of the non-powered wiring section 52 is connected to ground.

[0061] The non-powered coil wire 51 can be efficiently manufactured from metal foil M2 or a metal plate by, for example, the following method. That is, the outline of the non-powered coil wire 51 is determined as shown in Figure 5, and the metal foil M2 or metal plate is etched or punched along this outline.

[0062] In the example shown in Figure 5, the non-powered side routing section 52 extends in approximately one direction. The first non-powered side coil section 54, the third non-powered side coil section 56, and the second non-powered side coil section 55 are arranged in this order along the direction in which the non-powered side routing section 52 extends. In the illustrated example, the non-powered side coil sections 54a, 56a, 55a, 54b, 56b, and 55b are arranged in this order along the direction in which the non-powered side routing section 52 extends.

[0063] Furthermore, the first to third non-powered coil sections 54 to 56 are formed in a spiral shape. This eliminates the need to wind the coil wire 51 to form coils 57 to 59, as will be described later. The winding directions of the spiral-shaped first to third non-powered coil sections 54 to 56 are the same. Also, the first to third non-powered coil sections 54 to 56 are aligned on the same side with respect to the non-powered routing wire section 52.

[0064] Furthermore, if the non-powered coil wire 51 in the stator 20 is positioned radially outward from the powered coil wires 41-43, the spacing between the non-powered coil portions 54a, 56a, 55a, 54b, 56b, 55b in the metal foil M2 or metal plate may be greater than the spacing between the powered coil portions 47a, 49a, 48a, 47b, 49b, 48b in the metal foil M1 or metal plate. Also, if the non-powered coil wire 51 in the stator 20 is positioned radially inward from the powered coil wires 41-43, the spacing between the non-powered coil portions 54a, 56a, 55a, 54b, 56b, 55b in the metal foil M2 or metal plate may be smaller than the spacing between the powered coil portions 47a, 49a, 48a, 47b, 49b, 48b in the metal foil M1 or metal plate. This makes it easy to align the power supply side coil sections 47a, 49a, 48a, 47b, 49b, 48b and the corresponding non-power supply side coil sections 54a, 56a, 55a, 54b, 56b, 55b in the radial direction when mounting the conductive member 40 to the stator core 21.

[0065] As described above, the first power supply side coil portion 47 and the first non-power supply side coil portion 54 are electrically connected at their tips. The first power supply side coil portion 47 and the first non-power supply side coil portion 54 are attached to the first teeth 23a and 23d and wound around the first teeth 23a and 23d. The first power supply side coil portion 47 and the first non-power supply side coil portion 54 thus form the first coil 57 that winds around the first teeth 23a and 23d.

[0066] In the illustrated example, the first power supply side coil sections 47a and 47b are electrically connected to the first non-power supply side coil sections 54a and 54b, respectively. Also in the illustrated example, the first power supply side coil section 47a and the first non-power supply side coil section 54a form a first coil 57a that winds around the first tooth 23a. The first power supply side coil section 47b and the first non-power supply side coil section 54b form a first coil 57b that winds around the first tooth 23d.

[0067] Furthermore, the first power supply side coil section 47 and the first non-power supply side coil section 54 are connected such that their winding directions coincide. In other words, the first power supply side coil section 47 and the first non-power supply side coil section 54 are connected such that the first coil 57 is wound in a consistent direction from one end to the other.

[0068] Furthermore, as described above, the second power supply side coil portion 48 and the second non-power supply side coil portion 55 are electrically connected at their tips. The second power supply side coil portion 48 and the second non-power supply side coil portion 55 are attached to the second teeth 23b and 23e and wound around the second teeth 23b and 23e. The second power supply side coil portion 48 and the second non-power supply side coil portion 55 thus form the second coil 58 that winds around the second teeth 23b and 23e.

[0069] In the illustrated example, the second power supply side coil sections 48a and 48b are electrically connected to the second non-power supply side coil sections 55a and 55b, respectively. In the illustrated example, the second power supply side coil section 48a and the second non-power supply side coil section 55a form a second coil 58a that winds around the second tooth 23b. The second power supply side coil section 48b and the second non-power supply side coil section 55b form a second coil 58b that winds around the second tooth 23e.

[0070] Furthermore, the second power supply side coil section 48 and the second non-power supply side coil section 55 are connected so that their winding directions coincide. In other words, the second power supply side coil section 48 and the second non-power supply side coil section 55 are connected such that the second coil 58 is wound in a consistent direction from one end to the other.

[0071] Furthermore, as described above, the third power supply side coil portion 49 and the third non-power supply side coil portion 56 are electrically connected at their tips. The third power supply side coil portion 49 and the third non-power supply side coil portion 56 are attached to the third teeth 23c and 23f and wound around the third teeth 23c and 23f. Thus, the third power supply side coil portion 49 and the third non-power supply side coil portion 56 form the third coil 59 that winds around the third teeth 23c and 23f.

[0072] In the illustrated example, the third power supply coil sections 49a and 49b are electrically connected to the third non-power supply coil sections 56a and 56b, respectively. In the illustrated example, the third power supply coil section 49a and the second non-power supply coil section 56a form a third coil 59a that winds around the third tooth 23c. The third power supply coil section 49b and the third non-power supply coil section 56b form a third coil 59b that winds around the third tooth 23f.

[0073] Furthermore, the third power supply side coil section 49 and the third non-power supply side coil section 56 are connected such that their winding directions coincide. In other words, the third power supply side coil section 49 and the third non-power supply side coil section 56 are connected such that the third coil 59 is wound in a consistent direction from one end to the other.

[0074] The conductive member 40 manufactured in this manner does not require the winding of the conductive member 40 to form the coils 57-59. That is, because the power supply side coil portions 47-49 and the non-power supply side coil portion 53 are formed in a spiral shape (etched or punched out), the coils 57-59 can be formed simply by connecting the tips of the power supply side coil portions 47-49 and the tips of the non-power supply side coil portion 53. In other words, in the conductive member 40 manufactured in this manner, the coils 57-59 are formed before the conductive member 40 is mounted on the stator core 21. Then, by simply mounting these coils 57-59 onto the corresponding teeth 23 (in other words, by simply inserting the corresponding teeth 23 through the center of the spiral shape of these coils 57-59), the coils 57-59 can be provided around the teeth 23. As a result, the stator 20 (and therefore the motor 1) can be manufactured efficiently.

[0075] As shown in Figures 2 and 6, the first to third power supply coil wires 41 to 43 and the non-power supply coil wire 51 are electrically connected with a sheet-like insulating layer 60 in between. The insulating layer 60 is provided with an opening 61 through which the connection portion 50 between the power supply coil wires 41 to 43 and the non-power supply coil wire 51 is inserted. The insulating layer 60 is also provided with an opening 62 for inserting the teeth 23.

[0076] In the illustrated example, motor 1 is a three-phase AC motor. The first power supply side coil wire 41 and the first non-power supply side coil section 54 are U-phase coil wires, and the first coil 57 is a U-phase coil. The second power supply side coil wire 42 and the second non-power supply side coil section 55 are W-phase coil wires, and the second coil 58 is a W-phase coil. The third power supply side coil wire 43 and the third non-power supply side coil section 56 are V-phase coil wires, and the third coil 59 is a V-phase coil. One end of the U-phase coil wire, V-phase coil wire, and W-phase coil wire (the left end in Figure 3) is connected to the power supply section as described above. The other ends of the U-phase coil wire, V-phase coil wire, and W-phase coil wire are electrically connected to each other by the non-power supply side routing section 52.

[0077] Next, we will explain the manufacturing method of the stator 20. First, a stator core 21 is prepared, which includes an annular core back 22 and teeth 23 extending radially inward from the core back 22. Furthermore, the first to third power supply side coil wires 41 to 43 and the non-power supply side coil wire 51 are manufactured using the method described with reference to Figures 4 to 5. Furthermore, an insulating layer 60 with openings 61 and 62 formed therein is prepared. Next, the first to third power supply coil wires 41 to 43, the insulating layer 60, and the non-power supply coil wire 51 are stacked in this order. At this time, when viewed from one side of the insulating layer 60, the power supply coil wires 41 to 43 and the non-power supply coil wire 51 are arranged on one side and the other side of the insulating layer 60 such that the winding direction of the power supply coil sections 47 to 49 and the winding direction of the non-power supply coil sections 54 to 56 coincide, and the centers of the spiral coil sections 47 to 49 and 54 to 56 overlap with the opening 62 of the insulating layer 60. Next, the tips of the first to third power supply side coil sections 47 to 49 and the tips of the first to third non-power supply side coil sections 54 to 56 are electrically connected by welding or ultrasonic bonding. This creates a conductive member 40 having coils 57 to 50. Next, the coils 57-59 of the conductive member 40 are attached to the corresponding teeth 23 of the stator core 21. Specifically, the teeth 23 are inserted through the corresponding coils 57-59 and the openings 62 of the insulating layer 60. In addition, the routing portions 44-46, 52 of the conductive member 40 are attached to the stator core 21, generally along the circumferential direction.

[0078] When using a conductive member 40 manufactured by the method shown in Figures 4 to 6, the conductive member 40 is attached to the stator core 21 in the following manner.

[0079] That is, the first coil 57, the third coil 59, and the second coil 58 are arranged in this order along the circumferential direction between the first power supply side wiring section 44 and the second power supply side wiring section 45, which extend along the circumferential direction. In the illustrated example, coils 57a, 59a, 58a, 57b, 59b, and 58b are arranged in this order along the circumferential direction between the first power supply side wiring section 44 and the second power supply side wiring section 45.

[0080] Furthermore, the third power supply side routing section 46 has a portion 461 that extends circumferentially on the side of the second power supply side routing section 45, which is closer to the first coil 57a and the third coil 59a; a portion 462 that extends between the third coil 59a and the second coil 58a; and a portion 463 that extends circumferentially on the side of the first power supply side routing section 44, which is closer to the second coil 58a. Furthermore, the third power supply side routing section 46 includes a portion 464 extending between the second coil 58a and the first coil 57b, a portion 465 extending circumferentially on the side of the second power supply side routing section 45 that is closer to the first coil 57b and the third coil 59b, a portion 466 extending between the third coil 59b and the second coil 58b, and a portion 467 extending circumferentially on the side of the first power supply side routing section 44 that is closer to the second coil 58b.

[0081] Furthermore, in the state shown in Figure 6 before the conductive member 40 is attached to the stator core 21, the coil portions 47-49, 54-56 of the coil wires 41-43, 51 are spiral-shaped, revolving in a plane. On the other hand, in the state shown in Figure 2 after the conductive member 40 is attached to the stator core 21, the coil portions 47-49, 54-56 may be shaped by curving along the circumferential direction compared to the coil portions 47-49, 54-56 shown in Figure 6. In other words, the coil portions 47-49, 54-56 of the conductive member 40 after it is attached to the stator core 21 may be spiral-shaped, revolving within a curved surface that curves along the circumferential direction.

[0082] <<<Modified Version>>> Although one embodiment has been described above with reference to specific examples, these examples are not intended to limit the embodiment to any single embodiment. The above-described embodiment can be implemented in various other examples, and various omissions, substitutions, modifications, and additions can be made without departing from its essence.

[0083] For example, in the above example, each power supply coil wire 41-43 has two coil sections. However, the number of coil sections in each power supply coil wire 41-43 may be one or three or more. The non-power supply coil wire 51 may have a number of coil sections corresponding to the number of coil sections in the power supply coil wires 41-43.

[0084] Furthermore, in the example described above, the conductive member 40 has three power supply coil wires 41 to 43. However, the number of power supply coil wires in the conductive member 40 may be one or two, or four or more.

[0085] Furthermore, an additional coil section consisting of additional coil wire formed in a spiral shape may be placed between the power supply side coil sections 47-49 and the non-power supply side coil section 53. In other words, the power supply side coil sections 47-49 and the non-power supply side coil section 53 may be electrically connected via the additional coil section. For example, as shown in Figure 7, additional coil sections 71 and 72 with the same winding direction as the coil sections 47-49 and 53 can be prepared, and the ends of the power supply side coil sections 47-49 can be electrically connected to the inner end of one additional coil section 71, the outer end of one additional coil section 71 can be electrically connected to the outer end of the other additional coil section 72, and the outer ends can be electrically connected to the inner end of the other additional coil section 72 and the end of the non-power supply side coil section 53, thereby forming a coil that is wound in a constant direction from one end to the other. In this case as well, the work of winding coil wire to form the coil is not required. The number of additional coils placed between the power supply coil sections 47-49 and the non-power supply coil section 53 is arbitrary.

[0086] The additional coil sections 71 and 72 may be in the form of plates. Alternatively, the additional coil sections 71 and 72 may be formed by etching or punching out metal foil or metal plates. Furthermore, the additional coil sections 71 and 72 may be electrically connected to the power supply side coil sections 47-49 and the non-power supply side coil section 53 by welding or ultrasonic bonding. The additional coil sections 71 and 72 may also be electrically connected to each other by welding or ultrasonic bonding.

[0087] Furthermore, the power supply coil sections 47-49 and the non-power supply coil section 53, the power supply coil sections 47-49 and the additional coil section 71, the additional coil sections 71 and 72 with each other, and / or the additional coil section 72 and the non-power supply coil section 53 may be connected by methods other than welding or ultrasonic bonding.

[0088] For example, as shown in Figure 8, annular portions 73 may be formed at each end of the two coil portions to be connected, and the coil portions may be connected by applying fasteners 74 such as screws or rivets to the annular portions 73, 73.

[0089] Alternatively, the two coil sections may be connected by forming a crimped portion on one end of each coil section. For example, as shown in Figure 8, a crimped portion 75 can be formed by making radial cuts at the end of one coil section. An annular portion 73 can be formed at the end of the other coil section. The crimped portion 75 can then be passed through the annular portion 73 of the other coil section and bent. Or, as shown in Figure 10, a cone-shaped crimped portion 75 can be formed by drawing a section at the end of one coil section. An annular portion 73 can then be formed at the end of the other coil section. The crimped portion 75 can then be passed through the annular portion 73 of the other coil section and the tip of the crimped portion 75 can be crushed. The ends of the two coil sections can also be connected by these methods.

[0090] The stator 20 according to the embodiment described above is A stator core 21 including an annular core back 22 and first teeth 23a, 23d extending radially inward from the core back 22, A first power supply coil wire 41 from which power is supplied from the power supply unit, It includes a non-powered coil wire 51. The first power supply coil wire 41 includes a first power supply routing section 44 that is routed circumferentially as a whole, and first power supply coil sections 47a and 47b that extend (or branch off) from the first power supply routing section 44 and are formed in a spiral shape to wind around the first teeth 23a and 23d. The non-powered coil wire 51 includes a non-powered routing section 52 that is routed circumferentially as a whole, and a first non-powered coil section 54 that extends (or branches off) from the non-powered routing section 52 and is formed in a spiral shape, winding around the first teeth 23a, 23d. The first coils 57a and 57b are formed by electrically connecting the tips of the first power supply side coil sections 47a and 47b with the tip of the first non-power supply side coil section 54.

[0091] With such a stator 20, the work of winding coil wires 41, 51 to form the first coils 57a, 57b is not required. As a result, the manufacturing efficiency of the stator 20 (and therefore the motor 1) can be improved.

[0092] Furthermore, in the stator 20 according to the embodiment described above, the first power supply side coil wire 41 and the non-power supply side coil wire 51 are plate-shaped. In this case, the thickness of the first coils 57a, 57b and the stator 20 can be reduced, and the stator 20 (and therefore the motor 1) can be made smaller.

[0093] Furthermore, the stator 20 according to the embodiment described above further includes a second power supply coil wire 42 to which power is supplied from the power supply unit. The stator core 21 further includes second teeth 23b and 23e that are aligned circumferentially with the first teeth 23a and 23d and extend radially inward from the core back 22. The second power supply coil wire 42 includes a second power supply routing section 45 that is routed circumferentially as a whole, and second power supply coil sections 48a and 48b that extend (or branch off) from the second power supply routing section 45 and are formed in a spiral shape to wind around the second teeth 23b and 23e. The non-powered coil wire 51 further includes second non-powered coil sections 55a and 55b that extend (or branch off) from the non-powered routing section 52 and are formed in a spiral shape, winding around the second teeth 23b and 23e. The second coils 58a and 58b are formed by connecting the tips of the second power supply side coil sections 48a and 48b with the tips of the second non-power supply side coil sections 55a and 55b.

[0094] With such a stator 20, the work of winding coil wires 42 and 51 to form the second coils 58a and 58b is not required. As a result, the manufacturing efficiency of the stator 20 (and therefore the motor 1) can be improved.

[0095] Furthermore, in the stator 20 according to the embodiment described above, the second power supply side coil wire 42 and the non-power supply side coil wire 51 are plate-shaped. In this case, the thickness of the second coils 58a, 58b and the stator 20 can be reduced, and the stator 20 (and therefore the motor 1) can be made smaller.

[0096] Furthermore, in the stator 20 according to the embodiment described above, the first coils 57a, 57b and the second coils 58a, 58b are located between the first power supply side wiring section 44 and the second power supply side wiring section 45.

[0097] Furthermore, the stator 20 according to the embodiment described above further comprises a third power supply coil wire 43 to which power is supplied from the power supply unit. The stator core 21 further includes third teeth 23c, 23f that are aligned circumferentially with the first teeth 23a, 23d and the second teeth 23b, 23e and extend radially inward from the core back 22. The third power supply coil wire 43 includes a third power supply routing section 46 that is routed circumferentially as a whole, and third power supply coil sections 49a and 49b that extend (or branch off) from the third power supply routing section 46 and are formed in a spiral shape to wind around the third teeth 23c and 23f. The non-powered coil wire 51 further includes third non-powered coil sections 56a and 56b that extend (or branch off) from the non-powered routing section 52 and are formed in a spiral shape, winding around the third teeth 23c and 23f. The third coils 59a and 59b are formed by connecting the tips of the third power supply side coil sections 49a and 49b with the tips of the third non-power supply side coil sections 56a and 56b.

[0098] With such a stator 20, the work of winding coil wires 43 and 51 to form the third coils 59a and 59b is not required. As a result, the manufacturing efficiency of the stator 20 (and therefore the motor 1) can be improved.

[0099] Furthermore, in the stator 20 according to the embodiment described above, the third power supply side coil wire 43 and the non-power supply side coil wire 51 are plate-shaped. In this case, the thickness of the third coils 59a, 59b and the stator 20 can be reduced, and the stator 20 (and therefore the motor 1) can be made smaller.

[0100] Furthermore, in the stator 20 according to the embodiment described above, the first coils 57a, 57b, the third coils 59a, 59b, and the second coils 58a, 58b are arranged in this order along the circumferential direction between the first power supply side wiring section 44 and the second power supply side wiring section 45. The third power supply side routing section 46 has a portion 461 that extends on the side of the second power supply side routing section 45 beyond the first coils 57a, 57b and the third coils 59a, 59b, a portion 462 that extends between adjacent third coils 59a, 59b and second coils 58a, 58b, and a portion 463 that extends on the side of the first power supply side routing section 44 beyond the second coils 58a, 58b. The power supply side coil wires 41 to 43 arranged on the stator 20 in this way can be efficiently manufactured simultaneously from a single metal foil M1 or metal plate. This improves the manufacturing efficiency of the motor 1.

[0101] The motor 1 according to the embodiment described above is equipped with the stator 20 mentioned above.

[0102] The conductive member 40 according to the embodiment described above comprises at least two coil wires 41-43, 51. Each coil wire 41-43, 51 includes a routing section 44-46, 52 and a coil section 47-49, 53 that extends (or branches off) from the routing sections 44-46, 52 and is formed in a spiral shape. Coils 57-59 are formed by electrically connecting the tip of the coil portion 53 of one coil wire 51 with the tips of the coil portions 47-49 of the other coil wires 41-43.

[0103] With such a conductive member 40, the work of winding coil wires 41-43, 51 to form coils 57-59 is not required. As a result, the manufacturing efficiency of the motor 1 to which the conductive member 40 is applied can be improved.

[0104] Furthermore, in the conductive member 40 according to the embodiment described above, the coil wires 41-43 and 51 are plate-shaped. In this case, the thickness of the coils 57-59 can be reduced, and the motor 1 can be miniaturized.

[0105] The method for manufacturing the conductive member 40 according to one embodiment described above is A step of manufacturing at least two coil wires 41-43,51, each including a routing wire section 44-46,52 and a coil section 47-49,53 that extends (or branches off) from the routing wire sections 44-46,52 and is formed in a spiral shape, The process includes the step of forming coils 57-59 by electrically connecting the tip of the coil portion 53 of one coil wire 51 with the tips of the coil portions 47-49 of the other coil wires 41-43.

[0106] According to this method of manufacturing the conductive member 40, there is no need to wind coil wires 41-43, 51 to form coils 57-59. As a result, the manufacturing efficiency of the motor 1 to which the conductive member 40 is applied can be improved.

[0107] Furthermore, in the method for manufacturing the conductive member 40 according to the embodiment described above, at least two coil wires are produced by etching or punching out metal foils M1, M2 or metal plates. In this case, it is easy to produce plate-shaped coil wires 41-43, 51.

[0108] Furthermore, in the method for manufacturing the conductive member 40 according to the embodiment described above, the other coil wires 41 to 43 include the first coil wire 41 and the second coil wire 42. The first coil wire 41 and the second coil wire 42 are manufactured by etching or punching a metal foil M1 or metal plate such that the routing portion 44 of the first coil wire 41 and the routing portion 45 of the second coil wire 42 extend parallel to each other along the first direction D1, spaced apart from each other, and the coil portion 47 of the first coil wire 41 and the coil portion 48 of the second coil wire 42 are aligned along the first direction D1 between the routing portion 44 of the first coil wire 41 and the routing portion 45 of the second coil wire 42. In this case, the first and second coil wires 41 and 42 can be manufactured simultaneously and efficiently from a single metal foil M1 or metal plate.

[0109] Furthermore, in the method for manufacturing the conductive member 40 according to the embodiment described above, the other coil wires 41 to 43 include the first coil wire 41, the second coil wire 42, and the third coil wire 43. Then, the first coil wire 41, the second coil wire 42 and the third coil wire 43 are connected. The routing portion 44 of the first coil wire 41 and the routing portion 45 of the second coil wire 42 are spaced apart from each other and extend parallel to each other along the first direction D1, and The coil portion 47 of the first coil wire 41, the coil portion 49 of the third coil wire 43, and the coil portion 48 of the second coil wire 42 are arranged in this order along the first direction D1 between the routing portion 44 of the first coil wire 41 and the routing portion 45 of the second coil wire 42, and The routing portion 46 of the third coil wire 43 is such that it has a portion extending between the coil portion 47 of the first coil wire 41 and the coil portion 49 of the third coil wire 43 and the routing portion 45 of the second coil wire 42, a portion extending between the coil portion 49 of the third coil wire 43 and the coil portion 48 of the second coil wire 42, and a portion extending between the coil portion 48 of the second coil wire 42 and the routing portion 44 of the first coil wire 41. It is manufactured by etching or punching out metal foil M1 or a metal plate. In this case, the first to third coil wires 41 to 43 can be efficiently manufactured simultaneously from a single metal foil M1 or metal plate.

[0110] The method for manufacturing the stator 20 according to one embodiment described above is A step of preparing a stator core 21 including an annular core back 22 and teeth 23 extending radially inward from the core back 22, The process of manufacturing the conductive member 40 by the manufacturing method described above, The process includes inserting the teeth 23 of the stator core 21 through the coils 57-59 of the conductive member 40.

[0111] According to this method of manufacturing the stator 20, it is not necessary to wind the coil wires 41-43, 51 to form the coils 57-59. As a result, the manufacturing efficiency of the stator 20 (and therefore the motor 1) can be improved.

[0112] In addition, while several modifications of the above-described embodiments have been explained, it is naturally possible to combine and apply multiple modifications as appropriate. [Explanation of Symbols]

[0113] 1 motor 10 rotors 20 staters 21 Stator Core 22 Coreback 23 Teeth 23a, 23d First teeth 23b, 23e Second teeth 23c, 23f Third Teeth 30 Housing 40 Conductive members 41. First power supply coil wire 42 Second power supply coil wire 43 Third power supply coil wire 44 First power supply side wiring section 45 Second power supply side wiring section 46 Third power supply side routing section 47, 47a, 47b First power supply side coil section 48, 48a, 48b Second power supply side coil section 49, 49a, 49b Third power supply side coil section 51 Non-powered coil wire 52 Non-powered side wiring section 54, 54a, 54b First non-powered coil section 55, 55a, 55b Second non-powered coil section 56, 56a, 56b Third non-powered coil section 57, 57a, 57b First coil 58, 58a, 58b Second coil 59, 59a, 59b Third coil

Claims

1. A stator core comprising an annular core back, first teeth extending radially inward from the core back, and second teeth aligned circumferentially with the first teeth and extending radially inward from the core back, A first power supply coil wire and a second power supply coil wire, to which power is supplied from the power supply unit, It comprises a non-powered coil wire, The first power supply coil wire includes a first power supply routing portion that is routed circumferentially as a whole, and a first power supply coil portion that extends from the first power supply routing portion and is formed in a spiral shape to wind around the first teeth, The second power supply coil wire includes a second power supply routing portion that is routed circumferentially as a whole, and a second power supply coil portion that extends from the second power supply routing portion and is formed in a spiral shape to wind around the second teeth. The non-powered coil wire includes a non-powered routing portion that is routed circumferentially as a whole, a first non-powered coil portion that extends from the non-powered routing portion and is formed in a spiral shape to wind around the first teeth, and a second non-powered coil portion that extends from the non-powered routing portion and is formed in a spiral shape to wind around the second teeth, The first coil is formed by electrically connecting the tip of the first power supply side coil and the tip of the first non-power supply side coil. A stator in which a second coil is formed by connecting the tip of the second power supply side coil section and the tip of the second non-power supply side coil section.

2. The stator according to claim 1, wherein the first power supply coil wire, the second power supply coil wire, and the non-power supply coil wire are plate-shaped.

3. The stator according to claim 1 or 2, wherein the first coil and the second coil are located between the first power supply side wiring section and the second power supply side wiring section.

4. The device further comprises an insulating layer sandwiched between the first power supply coil wire, the second power supply coil wire, and the non-power supply coil wire. The first teeth and the second teeth are inserted through the first tooth opening and the second tooth opening provided in the insulating layer, respectively. The tip of the first power supply coil and the first non-power supply coil are connected through a first connection opening provided in the insulating layer. The stator according to any one of claims 1 to 3, wherein the tip of the second power supply side coil portion and the second non-power supply side coil portion are connected through a second connecting opening provided in the insulating layer.

5. The stator further comprises a third power supply coil wire to which power is supplied from the power supply unit, The stator core further includes a third tooth that is circumferentially aligned with the first and second teeth and extends radially inward from the core back. The third power supply coil wire includes a third power supply routing portion that is routed circumferentially as a whole, and a third power supply coil portion that extends from the third power supply routing portion and is formed in a spiral shape to wind around the third teeth, The non-powered coil wire further includes a third non-powered coil portion that extends from the non-powered routing portion and is formed in a spiral shape, winding around the third teeth. The stator according to any one of claims 1 to 4, wherein a third coil is formed by connecting the tip of the third power supply side coil portion and the tip of the third non-power supply side coil portion.

6. The stator according to claim 5, wherein the third power supply coil wire and the non-power supply coil wire are plate-shaped.

7. The first coil, the third coil, and the second coil are arranged in this order along the circumferential direction between the first power supply side wiring section and the second power supply side wiring section. The stator according to claim 5 or 6, wherein the third power supply side routing portion has a portion that extends on the side of the second power supply side routing portion more than the first coil and the third coil, a portion that extends between the third coil and the second coil, and a portion that extends on the side of the first power supply side routing portion more than the second coil.

8. The device further comprises an insulating layer sandwiched between the first power supply coil wire, the second power supply coil wire, the third power supply coil wire, and the non-power supply coil wire. The first teeth, the second teeth, and the third teeth are inserted through the first tooth opening, the second tooth opening, and the third tooth opening provided in the insulating layer, respectively. The tip of the first power supply coil and the first non-power supply coil are connected through a first connection opening provided in the insulating layer. The tip of the second power supply coil and the second non-power supply coil are connected through a second connection opening provided in the insulating layer. The stator according to any one of claims 5 to 7, wherein the tip of the third power supply coil portion and the third non-power supply coil portion are connected through a third connecting opening provided in the insulating layer.

9. A motor comprising a stator according to any one of claims 1 to 8.

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