Stator and rotating electrical machine

Abstract

A stator (10) is provided with stator constituent units (12) divided for each of a plurality of phases. Each of the stator constituent units has a plurality of tooth portions (28) and a winding (16). The winding has a plurality of winding portions (30) respectively wound around the plurality of tooth portions, and a jumper wire (32) connecting the plurality of winding portions in the circumferential direction of the stator. A winding start terminal portion (34) and a winding end terminal portion (35) of the winding extend to one side of the stator in the axial direction. In a first stator constituent unit (12V, 12W), the plurality of winding portions are positioned on one side of the stator in the axial direction and in a second stator constituent unit (12U), the plurality of winding portions are positioned on the other side of the stator in the axial direction, and a winding start terminal portion (34U) is inserted into a slot adjacent to one side of a tooth portion from among of the plurality of tooth portions and a winding end terminal portion (35U) is inserted into a slot adjacent to the other side thereof.

Description

Stator and rotating electrical machine Cross-reference to related applications

[0001] This application is based on Japanese Patent Application No. 2025-018789 filed on February 6, 2025, claims the benefit of its priority, and all the contents of the patent application are incorporated herein by reference.

[0002] The technology of the present disclosure relates to a stator and a rotating electrical machine.

[0003] Conventionally, there is a rotating electrical machine including a stator having an annular stator core and a rotor accommodated inside the stator core in the radial direction. Also, among this type of rotating electrical machines, there is one in which the stator is composed of a plurality of stator constituent units (see, for example, Japanese Patent No. 5502115). Each stator constituent unit includes a plurality of core constituent members constituting the stator core, windings wound around the plurality of core constituent members, and an insulator insulating the core constituent members and the windings. The winding has a plurality of winding portions wound around the plurality of core constituent members and a connecting wire connecting the plurality of winding portions in the circumferential direction of the stator. The insulator has a plurality of insulating portions attached to the core constituent members and insulating the core constituent members and the winding portions, and a connecting portion formed along the circumferential direction of the stator and connecting the plurality of insulating portions.

[0004] As a result of the inventors' detailed examination, the following problem was found. That is, in a configuration where the connecting portion of each stator constituent unit is arranged on one side in the axial direction of the stator, if the connecting wires of each stator constituent unit are wired along the connecting portion, it is assumed that it becomes difficult to ensure the withstand voltage of each connecting wire because the distance between the connecting wires of each stator constituent unit becomes short.

[0005] Here, it is conceivable to ensure the voltage withstand capability of each jumper wire by arranging the connection portion of the first stator component unit, of which there are multiple stator component units, on one side of the stator's axial direction, and arranging the connection portion of the second stator component unit, of which there are multiple stator component units, on the other side of the stator's axial direction, thereby increasing the distance between the jumper wires wired to the connection portion of the first stator component unit and the jumper wires wired to the connection portion of the second stator component unit.

[0006] However, in this case, the second stator configuration unit requires that the starting and ending ends of the windings extend from the jumper wire located on the other axial side of the stator to one side of the stator. It is conceivable to insert the ending end directly into the slot at the end of the winding and extend it to one side of the stator's axial direction. However, in this case, the number of turns in the winding section increases by half a turn between the starting and ending ends. As a result, in the second stator configuration unit, there are areas where the number of turns in the winding section is uneven, which may degrade the vibration characteristics of the rotating electric machine.

[0007] The technology disclosed herein provides a stator and a rotating electric machine that can suppress the deterioration of the vibration characteristics of the rotating electric machine.

[0008] A first aspect of the technology of the present disclosure is a stator comprising stator configuration units divided into a plurality of phases, each of which has a plurality of teeth and a winding, the winding having a plurality of windings wound around each of the plurality of teeth, a connecting wire connecting the plurality of windings in the circumferential direction of the stator, a starting end extending to one axial side of the stator, and a ending end extending to the other axial side of the stator, wherein in one or more first stator configuration units of the plurality of stator configuration units, the plurality of windings are located on one axial side of the stator, and in the remaining second stator configuration units of the plurality of stator configuration units, the plurality of windings are located on the other axial side of the stator, and the ending end is inserted into a slot adjacent to the other tooth of the first tooth into which the starting end is inserted.

[0009] A second aspect of the technology of the present disclosure is a rotating electric machine comprising a stator according to the first aspect and a rotor housed radially inward of the stator, wherein the ratio of the number of slots of the stator to the number of magnetic poles of the rotor is 1.5 and the number of slots is even.

[0010] The technology of this disclosure provides a stator and a rotating electric machine that can suppress the deterioration of the vibration characteristics of the rotating electric machine.

[0011] This is an exploded perspective view of a stator according to one embodiment of the technology of this disclosure. This is a longitudinal cross-sectional view of a stator according to one embodiment of the technology of this disclosure. This is a plan view showing the state before the U-phase core component is moved using the movable part in a stator according to one embodiment of the technology of this disclosure. This is a plan view of a U-phase insulator according to one embodiment of the technology of this disclosure. This is an enlarged perspective view of the main part of a U-phase insulator according to one embodiment of the technology of this disclosure. This is an enlarged plan view of the main part of a U-phase insulator according to one embodiment of the technology of this disclosure. This is a cross-sectional view taken along the line F7-F7 in Figure 6. This is a flowchart showing the process of manufacturing a stator according to one embodiment of the technology of this disclosure. This is a plan view of a stator according to the first example. This is a wiring diagram of a stator according to the first example. This is a connection diagram of a stator according to the first example. This is a plan view of a stator according to the second example. This is a wiring diagram of a stator according to the second example. This is a plan view of a stator according to the third example. This is a wiring diagram of a stator according to the third example. This is a connection diagram of a stator according to the third example. This is a plan view of a stator according to the fourth example. This is a wiring diagram of a stator according to the fourth example. This is a wiring diagram of a stator according to the fifth example. This is a wiring diagram of the stator relating to Example 6. This is a wiring diagram of the stator relating to Example 7. This is a wiring diagram of the stator relating to Example 8. This is a wiring diagram of the stator relating to Example 9. This is a wiring diagram of the stator relating to Example 10. This is a wiring diagram of the stator relating to Example 11. This is a wiring diagram of the stator relating to Example 12. This is a wiring diagram of the stator relating to Example 13. This is a wiring diagram of the stator relating to Example 14. This is a wiring diagram of the stator relating to Example 15. This is a wiring diagram of the stator relating to Example 16. This is a wiring diagram of the stator relating to Example 17. This is a wiring diagram of the stator relating to Example 18. This is an enlarged plan view of the main part of the stator relating to Example 19 (a diagram showing a comparison with Example 1). This is a wiring diagram of the stator relating to Example 19 (a diagram showing a comparison with Example 1). This is a plan view of the stator relating to the first comparative example. This is a wiring diagram of the stator relating to the first comparative example. This is a plan view of the stator relating to the second comparative example. This is a wiring diagram of the stator relating to the second comparative example. This is a wiring diagram of the stator relating to the second comparative example.

[0012] An embodiment of the technology described herein will be described below.

[0013] As shown in Figure 1, the stator 10 according to this embodiment is a so-called split-core type stator. The basic configuration of a split-core type stator is described in Japanese Patent No. 5502115. The stator 10 is an improved version of the stator described in Japanese Patent No. 5502115. The stator 10 is applied to a rotating electric machine M (see Figure 2), which is an inner rotor type brushless motor. That is, the stator 10 is equipped with a stator core 20, which will be described later, and a rotor 11 is rotatably housed radially inside the stator core 20, so that the stator 10 and the rotor 11 constitute the rotating electric machine M.

[0014] The rotating electric machine M according to this embodiment is an 8-pole, 12-slot brushless motor, with 8 magnetic poles on the rotor 11 and 12 slots on the stator 10. Unless otherwise specified, the following description will be based on an 8-pole, 12-slot brushless motor as an example.

[0015] The stator 10 is composed of multiple stator component units 12 for the U-phase, V-phase, and W-phase. The stator 10 has one stator component unit 12 for each phase. That is, the total number of multiple stator component units 12 is three.

[0016] In the following explanation, when distinguishing between multiple stator configuration units 12, the U-phase stator configuration unit 12U will be referred to as "stator configuration unit 12U", the V-phase stator configuration unit 12 as "stator configuration unit 12V", and the W-phase stator configuration unit 12 as "stator configuration unit 12W".

[0017] Each stator component unit 12 comprises a plurality of core components 14, a winding 16, and an insulator 18. The number of plurality of core components 14 in each stator component unit 12 is four. When the plurality of stator component units 12 are combined, the plurality of core components 14 form an annular stator core 20 (see Figure 2). Each core component 14 has teeth (described later) that protrude radially inward from the stator 10. The space between adjacent teeth in the circumferential direction of the stator 10 is formed as a slot.

[0018] The winding 16 has a plurality of winding sections 30 wound around the teeth of each core component 14, a plurality of jumper wires 32 (see Figure 2) connecting the plurality of winding sections 30 to each other, and a pair of terminal sections that are both ends of the winding 16. The terminal sections are the starting terminal section or the ending terminal section (described later) of the winding 16. The terminal sections are connected, for example, to a circuit board (described later) provided in the rotating electric machine M.

[0019] The insulator 18 is made of resin. The insulator 18 has a plurality of insulating parts 36 and a connecting part 38. Each insulating part 36 is attached to the core component 14 and insulates the core component 14 from the winding part 30. The connecting part 38 is formed in an annular shape along the circumferential direction of the stator 10 and connects the plurality of insulating parts 36. In each stator component unit 12, the jumper wires 32 (see Figure 2) are routed along the connecting part 38. In each stator component unit 12, the plurality of core components 14 are arranged with a gap between adjacent core components 14 that allows for the arrangement of two core components 14 of the other phase.

[0020] Stator component unit 12W is assembled to stator component unit 12U from one axial side of stator 10, and stator component unit 12V is assembled to stator component units 12U and 12W from one axial side of stator 10. Stator component units 12V and 12W are examples of the "first stator component unit" according to the technology of this disclosure, and stator component unit 12U is an example of the "second stator component unit" according to the technology of this disclosure. Furthermore, stator component unit 12V is an example of the "third stator component unit" according to the technology of this disclosure, and stator component unit 12W is an example of the "fourth stator component unit" according to the technology of this disclosure.

[0021] As shown in Figure 2, the connecting portion 38 of the stator component unit 12V (hereinafter referred to as "connecting portion 38V") and the connecting portion 38 of the stator component unit 12W (hereinafter referred to as "connecting portion 38W") are positioned to overlap in the radial direction of the stator 10. Specifically, the connecting portion 38V is positioned in the axial direction of the stator 10 at a position corresponding to the connecting portion 38W (i.e., the same position in the axial direction of the stator 10), and the connecting portion 38V is positioned radially outward of the stator 10 relative to the connecting portion 38W. In other words, when viewed from above, the connecting portion 38V is arranged concentrically with the connecting portion 38W, and when viewed from the radial direction, they appear to overlap. Furthermore, the connecting portions 38V, 38W, and the connecting portion 38 of the stator component unit 12U (hereinafter referred to as "connecting portion 38U") are positioned separately on both sides of the stator 10 in the axial direction. Specifically, the connecting parts 38V and 38W are located on one axial side of the stator 10, and the connecting part 38U is located on the other axial side of the stator 10.

[0022] The inner diameters of the connecting portions 38U, 38V, and 38W are larger than the outer diameter D of the rotor 11. Furthermore, the connecting portions 38U, 38V, and 38W are positioned to overlap with the stator core 20 in the axial direction of the stator 10. In other words, the connecting portions 38U, 38V, and 38W are positioned to appear to overlap with the stator core 20 when viewed from the axial direction of the stator 10. Specifically, the inner diameters of the connecting portions 38U, 38V, and 38W are larger than the inner diameter of the stator core 20 and smaller than the outer diameter of the stator core 20.

[0023] In this embodiment, since the inner diameters of the connecting portions 38U, 38V, and 38W are larger than the outer diameter D of the rotor 11, there are no restrictions on the direction in which the rotor 11 is assembled to the stator 10, and the rotor 11 can be assembled to the stator 10 from both axial sides of the stator 10. However, if the connecting portions 38U, 38V, and 38W are positioned to overlap with the stator core 20 in the axial direction of the stator 10, there is a risk that the core component 14 of the stator component unit 12V (hereinafter referred to as "core component 14V") will interfere with the connecting portion 38W of the stator component unit 12W when assembling the stator component unit 12V to the stator component unit 12W from one axial side of the stator 10. If the core component 14V interferes with the connecting portion 38W, there is a risk that the assembly of the stator 10 cannot be ensured. Therefore, in this embodiment, the following structure is adopted in order to ensure the assembly of the stator 10.

[0024] As shown in Figure 3, in the stator configuration unit 12V, the connecting portion 38V has a movable portion 40 that moves the core component 14V. The movable portion 40 is configured to move the core component 14V from a position that is set back radially outward from the connecting portion 38W of the stator configuration unit 12W to a position that aligns with the core components 14U and 14W of the stator configuration units 12U and 12W, radially inward from the stator 10.

[0025] In Figures 1 and 3, the movable part 40 positions the core component 14V in a position set back from the connecting part 38W, while in Figure 2, the movable part 40 positions the core component 14V to be aligned on the same circumference as the core components 14U and 14W. When the core component 14V is positioned in a position set back from the connecting part 38W, the core component 14V is located radially outward from the connecting part 38W of the stator 10, thus avoiding interference between the core component 14V and the connecting part 38W, and the stator component unit 12V can be assembled to the stator component units 12U and 12W from one axial side of the stator 10. On the other hand, when the core component 14V is positioned to be aligned on the same circumference as the core components 14U and 14W, the core component 14V is positioned between the core components 14U and 14W, and the core components 14V, 14U, and 14W constitute an annular stator core 20.

[0026] As shown in Figures 4 to 6, the connecting portion 38V has a connecting body portion 42 formed along the circumferential direction of the insulator 18V. The movable portion 40 is provided on the radially outer side of the connecting body portion 42 and has a pair of support portions 44 that elastically support the insulating portion 36V that insulates the core component 14V relative to the connecting body portion 42. The pair of support portions 44 are provided on both sides of the insulator 18V in the circumferential direction relative to the insulating portion 36V. Each support portion 44 is formed in an arm shape extending from the connecting body portion 42 and has flexibility (i.e., elasticity) in the radial direction of the insulator 18V. The pair of support portions 44 extend along the tangential direction of the insulator 18V. It is desirable that the radius of curvature of the curved portion 44A (see Figure 6) connecting each support portion 44 and the connecting body portion 42 be sufficient to prevent cracking of the curved portion 44A. The pair of support parts 44 are positioned offset from the connecting main body 42 in the axial direction of the insulator 18V (see Figure 5).

[0027] The connecting portion 38V has a fixing portion 46 (see Figure 7) that fixes the position of the core component 14V when the core component 14V moves to a position where it is aligned on the same circumference as the core components 14U and 14W. The fixing portion 46 is a so-called snap-fit ​​structure and has a locking portion 48 formed on the connecting body portion 42 and a locked portion 50 formed on the support portion 44. Corresponding to the fact that the pair of support portions 44 are provided at a position offset in the axial direction of the insulator 18 relative to the connecting body portion 42 (see Figure 5), the locked portion 50 is provided at a position offset in the axial direction of the insulator 18V relative to the locking portion 48.

[0028] As the core component 14V moves radially inward from the radially outer side of the insulator 18V toward a position where it aligns with the core components 14U and 14W on the same circumference, the locking portion 50 moves over the locking portion 48 from the radially outer side of the insulator 18V. When the core component 14V reaches the position where it aligns with the core components 14U and 14W on the same circumference, the locking portion 50 is locked to the locking portion 48 from the radially inner side of the insulator 18V. This fixes the core component 14V in a position where it aligns with the core components 14U and 14W on the same circumference. When the fixing by the fixing portion 46 is released, the pair of support portions 44 are in a free state (i.e., in their original shape without elastic deformation), and the core component 14V is positioned behind the connecting portion 38W.

[0029] As shown in Figure 8, the manufacturing method of the rotating electric machine according to this embodiment comprises a stator component assembly step, a stator assembly step, and a rotor housing step. The stator component assembly step is a step of assembling each of the multiple stator component units 12 individually. The stator assembly step is a step of assembling stator component unit 12W to stator component unit 12U from one axial side of the stator 10, and assembling stator component unit 12V to stator component units 12U and 12W from one axial side of the stator 10.

[0030] In the stator assembly process, the fixing by the fixing part 46 is released, so that the core component 14V is positioned radially outward from the connecting part 38W of the stator 10, thereby preventing interference between the core component 14V and the connecting part 38W. Therefore, the stator component unit 12V can be assembled to the stator component units 12U and 12W from one axial side of the stator 10. Subsequently, after assembling the stator component unit 12V to the stator component units 12U and 12W, the movable part 40 is used to move the core component 14V radially inward from the position retracted from the connecting part 38W to a position where it is aligned on the same circumference as the core components 14U and W. As a result, the core component 14V is positioned between the core components 14U and 14W, and the core components 14V, 14U, and 14W form an annular stator core 20. Then, the support portion 44 is fixed to the connecting body portion 42 using the fixing portion 46, and the core component 14V is fixed in a position where it is aligned on the same circumference as the core components 14U and 14W. The rotor housing step is the step of housing the rotor 11 radially inward of the stator core 20.

[0031] As described in detail above, in this embodiment, the connecting portions 38U, 38V, and 38W are positioned to overlap with the stator core 20 in the axial direction of the stator 10, and the inner diameters of each connecting portion 38U, 38V, and 38W are larger than the outer diameter D of the rotor 11. Therefore, the rotor 11 can be assembled to the stator 10 from both sides in the axial direction of the stator 10 without any constraints on the assembly direction of the rotor 11 to the stator 10.

[0032] Furthermore, in the stator configuration unit 12V, the connecting portion 38V has a movable portion 40, and the movable portion 40 is configured to move the core component 14V from a position that is set back radially outward from the connecting portion 38W of the stator configuration unit 12W to a position that is aligned on the same circumference as the core components 14U and 14W of the stator configuration units 12U and 12W, towards the radially inward side of the stator 10.Therefore, when the core component 14V is positioned set back from the connecting portion 38W using the movable portion 40, the core component 14V is located radially outward from the connecting portion 38W of the stator 10, so interference between the core component 14V and the connecting portion 38W can be avoided.As a result, the stator configuration unit 12V can be assembled to the stator configuration units 12U and 12W from one axial side of the stator 10, thereby ensuring the ease of assembly of the stator 10.

[0033] Furthermore, after assembling the stator component unit 12V to the stator component units 12U and 12W, the movable part 40 can be used to move the core component 14V radially inward of the stator 10 so that it is aligned with the core components 14U and 14W on the same circumference. As a result, the core component 14V is positioned between the core components 14U and 14W, so that the core components 14V, 14U, and 14W can form an annular stator core 20.

[0034] Furthermore, the movable part 40 has a pair of support parts 44 that support the insulating part 36V relative to the connecting body part 42. Each support part 44 is formed in the shape of an arm extending from the connecting body part 42 and is flexible in the radial direction of the stator 10. Therefore, with a simple configuration, the core component 14V can be moved from a position set back from the connecting part 38W to a position where it is aligned with the core components 14U and 14W on the same circumference.

[0035] Furthermore, the connecting portion 38V has a fixing portion 46 that fixes the position of the core component 14V when the core component 14V moves to a position where it is aligned on the same circumference as the core components 14U and 14W. Therefore, by fixing the position of the core component 14V using the fixing portion 46, the core component 14V can be fixed to a position where it is aligned on the same circumference as the core components 14U and 14W.

[0036] Furthermore, the connecting portion 38V of the stator component unit 12V and the connecting portion 38W of the stator component unit 12W are positioned to overlap in the radial direction of the stator 10. Therefore, compared to, for example, the case where the connecting portion 38V and the connecting portion 38W are positioned to overlap in the axial direction of the stator 10, the axial length of the stator 10 can be shortened.

[0037] Furthermore, since the connecting sections 38V and 38W can be separated in the range where they overlap with the stator core 20 in the axial direction of the stator 10 (i.e., the range from the inner diameter to the outer diameter of the stator core 20), a distance can be secured between the jumper wire 32 wired along the connecting section 38V (hereinafter referred to as "jumper wire 32V") and the jumper wire 32 wired along the connecting section 38W (hereinafter referred to as "jumper wire 32W") (see Figure 2). This ensures the voltage withstand capability of the jumper wires 32V and 32W.

[0038] Furthermore, the connecting sections 38V, 38W and 38U are arranged separately on both sides of the stator 10 in the axial direction. Therefore, a sufficient distance can be secured between the jumper wires 32V, 32W and the jumper wire 32 (hereinafter referred to as "jumper wire 32U") which is wired along the connecting section 38U (see Figure 2). This ensures the voltage withstand capability of the jumper wire 32U.

[0039] In the above embodiment, the movable part 40 has a pair of support parts 44, but the shape of the pair of support parts 44 is not limited to the above embodiment. For example, the pair of support parts 44 may have a shape that increases the amount of radial movement of the insulator 18V compared to the above embodiment. Alternatively, for example, the pair of support parts 44 may have a shape that decreases the amount of radial movement of the insulator 18V compared to the above embodiment and increases the length along the circumferential direction of the insulator 18V.

[0040] Furthermore, the pair of support portions 44 may have a shape that includes a bent portion compared to the above embodiment. Also, the pair of support portions 44 may have a shape that further reduces the amount of radial movement of the insulator 18V compared to the above embodiment.

[0041] By the way, as in the above embodiment (see Figure 2), if the connecting parts 38V and 38W of the stator component units 12V and 12W are arranged on one axial side of the stator 10, and the connecting part 38U of the stator component unit 12U is arranged on the other axial side of the stator 10, the distance between the jumper wires 32V and 32W wired to the connecting parts 38V and 38W and the jumper wire 32U wired to the connecting part 38U can be increased, and the voltage withstand capability of each jumper wire 32 can be ensured. However, the following problems can be considered.

[0042] Figure 35 shows a plan view of the stator 110 according to the first comparative example, Figure 36 shows a wiring diagram of the stator 110 according to the first comparative example, and Figure 37 shows a connection diagram of the stator 110 according to the first comparative example.

[0043] The stator 110 has 12 teeth 28. The 12 teeth 28 are arranged in the following order from one side (R1 side) to the other side (R2 side) in the circumferential direction of the stator 10: "W4", "V4", "U4", "W3", "V3", "U3", "W2", "V2", "U2", "W1", "V1", and "U1".

[0044] The tooth portions 28 of "U1", "U2", "U3", and "U4" are the tooth portions 28 of the U phase (hereinafter referred to as "tooth portion 28U"). The tooth portions 28 of "V1", "V2", "V3", and "V4" are the tooth portions 28 of the V phase (hereinafter referred to as "tooth portion 28V"). The tooth portions 28 of "W1", "W2", "W3", and "W4" are the tooth portions 28 of the W phase (hereinafter referred to as "tooth portion 28W").

[0045] The winding 16U of the U phase (hereinafter referred to as "winding 16U") is wound in the order of the tooth portions 28 of "U1", "U4", "U3", and "U2" from one side (R1 side) to the other side (R2 side) in the circumferential direction of the stator 10. The winding 16V of the V phase (hereinafter referred to as "winding 16V") is wound in the order of the tooth portions 28 of "V1", "V2", "V3", and "V4" from the other side (R2 side) to the one side (R1 side) in the circumferential direction of the stator 10. The winding 16W of the W phase (hereinafter referred to as "winding 16W") is wound in the order of the tooth portions 28 of "W1", "W2", "W3", and "W4" from one side (R2 side) to the other side (R1 side) in the circumferential direction of the stator 10.

[0046] The winding 16U of the U phase has a winding portion 30 of the U phase (hereinafter referred to as "winding portion 30U") wound around the tooth portion 28U of the U phase. The winding 16V of the V phase has a winding portion 30 of the V phase (hereinafter referred to as "winding portion 30V") wound around the tooth portion 28V of the V phase. The winding 16WU of the W phase has a winding portion 30 of the W phase (hereinafter referred to as "winding portion 30W") wound around the tooth portion 28W of the W phase.

[0047] The plurality of winding portions 30U of the U phase are connected by a U-phase jumper wire 32 (hereinafter referred to as "jumper wire 32U") extending in the circumferential direction of the stator 10. The plurality of winding portions 30V of the V phase are connected by a V-phase jumper wire 32 (hereinafter referred to as "jumper wire 32V") extending in the circumferential direction of the stator 10. The plurality of winding portions 30U of the W phase are connected by a W-phase jumper wire 32 (hereinafter referred to as "jumper wire 32W") extending in the circumferential direction of the stator 10.

[0048] The V-phase jumper wire 32V and the W-phase jumper wire 32W are located on one axial side (A1 side) of the stator 10. The U-phase jumper wire 32U is located on the other axial side (A2 side) of the stator 10.

[0049] The U-phase jumper wire 32 is led out from the winding section 30U in the direction of tightening the winding section 30U. The V-phase jumper wire 32 is led out from the winding section 30V in the direction of tightening the winding section 30V. The W-phase jumper wire 32 is led out from the winding section 30W in the direction of tightening the winding section 30W.

[0050] The U-phase winding 16U has a starting end 34U and a ending end 35U. The V-phase winding 16V has a starting end 34V and a ending end 35V. The W-phase winding 16W has a starting end 34W and a ending end 35W.

[0051] The starting terminals 34U, 34V, and 34W, and the ending terminals 35U, 35V, and 35W, all extend to one axial side of the stator 10. A circuit board 22 is located on one axial side of the stator 10, and the starting terminals 34U, 34V, and 34W, and the ending terminals 35U, 35V, and 35W are connected to the circuit board 22.

[0052] The U-phase winding 16U, the V-phase winding 16V, and the W-phase winding 16W are connected in series. The configuration of the series connection is either a star connection or a delta connection.

[0053] In the stator 110 according to the first comparative example, the starting end portion 34U and the ending end portion 35U of the U-phase jumper wire 32U located on the other axial side (A2 side) of the stator 10 need to extend to one axial side (A1 side) of the stator 10. In the stator 110 according to the first comparative example, the ending end portion 35U is inserted directly into a slot at the ending position (i.e., position "U2") and extends to one axial side of the stator 10. However, in this case, the number of turns of the winding portion 30U increases by half a turn between the position of the starting end portion 34U (i.e., position "U1") and the position of the ending end portion 35U (i.e., position "U2"). As a result, in the U-phase stator component unit 12U, there are areas where the number of turns of the winding portion 30U is uneven, and if the stator 110 according to the first comparative example is applied to the rotating electric machine M, there is a risk that the vibration characteristics of the rotating electric machine M will deteriorate.

[0054] Figure 38 shows a plan view of the stator 120 according to the second comparative example, Figure 39 shows a wiring diagram of the stator 120 according to the second comparative example, and Figure 40 shows a connection diagram of the stator 120 according to the second comparative example.

[0055] The stator 120 in the second comparative example is obtained by connecting the U-phase winding 16U, the V-phase winding 16V, and the W-phase winding 16W in parallel with respect to the stator 110 in the first comparative example. The parallel connection configuration is either a star connection or a delta connection.

[0056] The U-phase winding 16U has winding 16Ua and winding 16Ub. Windings 16Ua and 16Ub each have a starting end 34U and a ending end 35U. The V-phase winding 16V has winding 16Va and winding 16Vb. Windings 16Va and 16Vb each have a starting end 34V and a ending end 35V. The W-phase winding 16W has winding 16Wa and winding 16Wb. Windings 16Wa and 16Wb each have a starting end 34W and a ending end 35W.

[0057] In the stator 120 according to the second comparative example, in the windings 16Ua and 16Ub, the starting end portion 34U and the ending end portion 35U need to extend from the U-phase jumper wire 32U located on the other axial side (A2 side) of the stator 10 toward one axial side (A1 side). Here, in the stator 120 according to the second comparative example, in the windings 16Ua and 16Ub, the ending end portion 35U is inserted directly into the slot at the end of the winding (i.e., the positions "U3" and "U1") and extends toward one axial side of the stator 10. However, in this case, the number of turns of the winding portion 30U increases by half a turn between the position of the starting end portion 34U (i.e., the positions "U4" and "U2") and the position of the ending end portion 35U (i.e., the positions "U3" and "U1"). As a result, in the U-phase stator configuration unit 12U, there are areas where the number of turns in the winding section 30U is uneven. Therefore, when the stator 120 according to the second comparative example is applied to the rotating electric machine M, there is a risk that the vibration characteristics of the rotating electric machine M will deteriorate. In particular, in the stator 120 according to the second comparative example, the number of areas where the number of turns in the winding section 30U is uneven increases compared to the stator 110 according to the first comparative example, so the deterioration of vibration characteristics becomes more pronounced.

[0058] Therefore, the following are examples of stator 10 with modified configurations to solve the above problems. In each example, the stator 10 has been modified in the following way compared to the above embodiment (see Figures 1 to 8).

[0059] [Example 1] First, we will explain the stator 10 related to Example 1.

[0060] Figure 9 shows a plan view of the stator 10 according to the first example, and Figure 10 shows a wiring diagram of the stator 10 according to the first example. The stator 10 according to the first example, like the first comparative example, has a U-phase winding 16U, a V-phase winding 16V, and a W-phase winding 16W connected in series. The series connection can be a star connection or a delta connection.

[0061] However, in the stator 10 according to the first example, compared to the first comparative example, the winding 16U has a jumper wire 32U extending from the winding end position (i.e., position "U2"), and the jumper wire 32U extends to the winding start position (i.e., position "U1"). The winding end portion 35U is inserted into the slot adjacent to the other side of the teeth portion 28U of "U1", into which the winding start end portion 34U is inserted. That is, the winding start end portion 34U is inserted into the slot adjacent to one side of the teeth portion 28U of "U1", and the winding end portion 35U is inserted into the slot adjacent to the other side of the teeth portion 28U of "U1". The teeth portion 28U of "U1" is an example of the "first teeth portion" according to the technology of this disclosure.

[0062] With this configuration, it is possible to eliminate the increase in the number of turns of the winding section 30U at positions "U2" and "U1" by half a turn compared to the first comparative example. As a result, the number of turns of the winding section 30U can be made uniform, and the deterioration of the vibration characteristics of the rotating electric machine M can be suppressed compared to the case where there are areas where the number of turns of the winding section 30U is uneven, as in the first comparative example.

[0063] Furthermore, in the stator 10 according to the first example, the starting terminals 34U, 34V, and 34W and the ending terminals 35U, 35V, and 35W can be consolidated. This simplifies the configuration of the circuit board 22 connected to the starting terminals 34U, 34V, and 34W and the ending terminals 35U, 35V, and 35W.

[0064] Figure 11 is a diagram comparing the delta connection configurations of the stator 10 according to the first example and the stator 110 according to the first comparative example. The left side of Figure 11 shows the delta connection of the stator 10 according to the first example, and the right side of Figure 11 shows the delta connection of the stator 110 according to the first comparative example. As described above, in the stator 10 according to the first example, compared to the first comparative example, the jumper wire 32U extending from the winding end position (i.e., position "U2") is extended to the winding start position (i.e., position "U1"), but the delta connection of the stator 10 according to the first example and the delta connection of the stator 110 according to the first comparative example can be considered equivalent.

[0065] [Second Example] Next, we will describe the stator 10 related to the second example.

[0066] Figure 12 shows a plan view of the stator 10 according to the second example, and Figure 13 shows a wiring diagram of the stator 10 according to the second example. Compared to the first example, the stator 10 according to the second example also has a jumper wire 32V extending from the winding end position (i.e., position "V4") of the winding 16V, and the jumper wire 32V extends to the winding start position (i.e., position "V1"). The end portion 35V of the winding end is inserted into the slot adjacent to the other side of the tooth portion 28U of "V1", into which the end portion 34V of the winding start is inserted. That is, the end portion 34V of the winding start is inserted into the slot adjacent to one side of the tooth portion 28V of "V1", and the end portion 35V of the winding end is inserted into the slot adjacent to the other side of the tooth portion 28V of "V1". The tooth portion 28V of "V1" is an example of the "second tooth portion" according to the technology of this disclosure.

[0067] Similarly, the winding 16W also has a jumper wire 32W extending from the winding end position (i.e., position "W4"), and the jumper wire 32W also extends to the winding start position (i.e., position "W1"). The winding end portion 35W is inserted into the slot adjacent to the other side of the teeth portion 28W of "W1", into which the winding start end portion 34W is inserted. That is, the winding start end portion 34W is inserted into the slot adjacent to one side of the teeth portion 28W of "W1", and the winding end portion 35W is inserted into the slot adjacent to the other side of the teeth portion 28W of "W1". The teeth portion 28W of "W1" is an example of the "second teeth portion" according to the technology of this disclosure.

[0068] Even with this configuration, it is possible to eliminate the increase in the number of turns of the winding section 30U at positions "U2" and "U1" by half a turn compared to the first comparative example. As a result, the number of turns of the winding section 30U can be made uniform, and the deterioration of the vibration characteristics of the rotating electric machine M can be suppressed compared to the case where there are areas where the number of turns of the winding section 30U is uneven, as in the first comparative example.

[0069] Furthermore, in the stator 10 according to the second example, the starting terminals 34U, 34V, and 34W and the ending terminals 35U, 35V, and 35W can be further consolidated compared to the first example. This further simplifies the configuration of the circuit board 22 connected to the starting terminals 34U, 34V, and 34W and the ending terminals 35U, 35V, and 35W.

[0070] [Third Example] Next, we will describe the stator 10 related to the third example.

[0071] Figure 14 shows a plan view of the stator 10 according to the third example, and Figure 15 shows a wiring diagram of the stator 10 according to the third example. The stator 10 according to the third example, like the second comparative example, has a U-phase winding 16U, a V-phase winding 16V, and a W-phase winding 16W connected in parallel. The parallel connection can be a star connection or a delta connection. Winding 16Ua is an example of the "first winding" according to the technology of this disclosure, and winding 16Ub is an example of the "second winding" according to the technology of this disclosure.

[0072] However, in the stator 10 according to the third example, compared to the second comparative example, the winding 16Ua has a jumper wire 32U extending from the winding end position (i.e., position "U3"), and the jumper wire 32U extends to the winding start position (i.e., position "U2"). The end portion 35U of the winding end of the winding 16Ua is inserted into the other slot adjacent to the teeth portion 28U of "U2", into which the beginning portion 34U of the winding 16Ub is inserted.

[0073] Similarly, the winding 16Ub has a jumper wire 32U extending from the end of the winding (i.e., the position "U1"), and the jumper wire 32U extends to the beginning of the winding (i.e., the position "U4"). The end portion 35U of the winding 16Ub is inserted into the other slot adjacent to the teeth portion 28U of "U4", into which the beginning portion 34U of the winding 16Ua is inserted.

[0074] With this configuration, it is possible to eliminate the increase in the number of turns of the winding section 30U by half a turn at positions "U2", "U4", "U1", and "U3" compared to the second comparative example. As a result, the number of turns of the winding section 30U can be made uniform, and the deterioration of the vibration characteristics of the rotating electric machine M can be suppressed compared to the case where there are areas where the number of turns of the winding section 30U is uneven, as in the second comparative example.

[0075] Furthermore, in the stator 10 according to the second example, the starting terminals 34U, 34V, and 34W and the ending terminals 35U, 35V, and 35W can be consolidated. This simplifies the configuration of the circuit board 22 connected to the starting terminals 34U, 34V, and 34W and the ending terminals 35U, 35V, and 35W.

[0076] Figure 16 is a diagram comparing the delta connection configurations of the stator 10 according to the third example and the stator 120 according to the second comparative example. The left side of Figure 16 shows the delta connection of the stator 10 according to the third example, and the right side of Figure 16 shows the delta connection of the stator 120 according to the second comparative example. As described above, in the stator 10 according to the third example, compared to the second comparative example, the jumper wire 32U of the winding 16Ua extending from the end of winding (i.e., position "U3") is extended to the beginning of winding (i.e., position "U2"), and the jumper wire 32U of the winding 16Ub extending from the end of winding (i.e., position "U1") is extended to the beginning of winding (i.e., position "U4"). However, the delta connection of the stator 10 according to the third example and the delta connection of the stator 120 according to the second comparative example can be considered equivalent.

[0077] [Example 4] Next, we will describe the stator 10 related to Example 4.

[0078] Figure 17 shows a plan view of the stator 10 according to the fourth example, and Figure 18 shows a wiring diagram of the stator 10 according to the fourth example. In the stator 10 according to the fourth example, in addition to the jumper wires 32U of the winding 16Ua extending from the winding end position (i.e., position "U3") and the jumper wires 32U of the winding 16Ub extending from the winding end position (i.e., position "U1"), the jumper wire 32V of the winding 16Va extending from the winding end position (i.e., position "V2") is also extended to the winding start position (i.e., position "V3"). The end portion 35V of the winding end of the winding 16Va is inserted into the slot adjacent to the other side of the teeth portion 28V of "V3", into which the beginning portion 34V of the winding 16Vb is inserted.

[0079] Furthermore, the jumper wire 32V of winding 16Vb, which extends from the end of the winding (i.e., the position "V4"), is extended to the beginning of the winding (i.e., the position "V1"). The end portion 35V of winding 16Vb is inserted into the slot adjacent to the other side of the tooth portion 28V of "V1", into which the beginning portion 34V of winding 16Va is inserted.

[0080] Similarly, the jumper wire 32W of winding 16Wa, which extends from the end of the winding (i.e., position "W2"), is also extended to the beginning of the winding (i.e., position "W3"). The end terminal portion 35W of winding 16Wa is inserted into the other slot adjacent to the tooth portion 28V of "W3", into which the beginning terminal portion 34W of winding 16Wb is inserted.

[0081] Furthermore, the jumper wire 32W of winding 16Wb, which extends from the end of the winding (i.e., the position "W4"), is extended to the beginning of the winding (i.e., the position "W1"). The end terminal portion 35W of winding 16Wb is inserted into the slot adjacent to the other side of the tooth portion 28V of "W1", into which the beginning terminal portion 34W of winding 16Wa is inserted.

[0082] Even with this configuration, it is possible to eliminate the increase in the number of turns of the winding section 30U at positions "U2", "U4", "U1", and "U3" compared to the second comparative example, by half a turn. As a result, the number of turns of the winding section 30U can be made uniform, and the deterioration of the vibration characteristics of the rotating electric machine M can be suppressed compared to the case where there are areas where the number of turns of the winding section 30U is uneven, as in the second comparative example.

[0083] Furthermore, in the stator 10 according to the fourth example, the starting terminals 34U, 34V, and 34W and the ending terminals 35U, 35V, and 35W can be further consolidated compared to the third example. This further simplifies the configuration of the circuit board 22 connected to the starting terminals 34U, 34V, and 34W and the ending terminals 35U, 35V, and 35W.

[0084] [Example 5] Next, we will describe the stator 10 related to Example 5.

[0085] Figure 19 shows the wiring diagram of the stator 10 according to the fifth example. The stator 10 according to the fifth example is a stator used in a 4-pole, 6-slot brushless motor. The stator 10 has six teeth 28. The six teeth 28 are arranged in the order of "W2", "V2", "U2", "W1", "V1", and "U1" from one side (R1 side) to the other side (R2 side) in the circumferential direction of the stator 10. The U-phase winding 16U, the V-phase winding 16V, and the W-phase winding 16W are connected in series. The series connection can be a star connection or a delta connection.

[0086] However, in the stator 10 according to the fifth example, the jumper wire 32U extending from the winding end position (i.e., position "U2") is extended to the winding start position (i.e., position "U1"). The winding end portion 35U is inserted into the slot adjacent to the other side of the teeth portion 28U of "U1", into which the winding start end portion 34U is inserted.

[0087] With this configuration, it is possible to eliminate the increase in the number of turns of the winding section 30U by half a turn at positions "U2" and "U1". As a result, the number of turns of the winding section 30U can be made uniform, and the deterioration of the vibration characteristics of the rotating electric machine M can be suppressed compared to when there are areas where the number of turns of the winding section 30U is uneven.

[0088] [Example 6] Next, we will describe the stator 10 related to Example 6.

[0089] Figure 20 shows the wiring diagram of the stator 10 according to the sixth example. In the stator 10 according to the sixth example, in addition to the jumper wire 32U extending from the winding end position (i.e., position "U2"), the jumper wire 32V extending from the winding end position (i.e., position "V2") is also extended to the winding start position (i.e., position "V1"). The winding end terminal portion 35V is inserted into the slot adjacent to the other side of the teeth portion 28U of "V1", into which the winding start terminal portion 34V is inserted.

[0090] Similarly, the jumper wire 32W extending from the end of the winding (i.e., the position of "W2") is also extended to the beginning of the winding (i.e., the position of "W1"). The end of the winding 35W is inserted into the slot adjacent to the other side of the teeth 28W of "W1", into which the beginning of the winding 34W is inserted.

[0091] Even with this configuration, it is possible to eliminate the increase in the number of turns of the winding section 30U by half a turn at positions "U2" and "U1". As a result, the number of turns of the winding section 30U can be made uniform, and the deterioration of the vibration characteristics of the rotating electric machine M can be suppressed compared to the case where there are areas where the number of turns of the winding section 30U is uneven.

[0092] Furthermore, in the stator 10 according to the sixth example, the starting terminals 34U, 34V, and 34W and the ending terminals 35U, 35V, and 35W can be consolidated compared to the fifth example. This simplifies the configuration of the circuit board 22 connected to the starting terminals 34U, 34V, and 34W and the ending terminals 35U, 35V, and 35W.

[0093] In the case of a stator used in a 4-pole, 6-slot brushless motor, if the wires are connected in parallel, the connecting section 38 is unnecessary and therefore will not be included in this explanation.

[0094] [Example 7] Next, we will describe the stator 10 related to Example 7.

[0095] Figure 21 shows the wiring diagram of the stator 10 according to the seventh example. The stator 10 according to the seventh example is a stator used in a 6-pole, 9-slot brushless motor. The stator 10 has nine teeth 28. The nine teeth 28 are arranged in the order of "W3", "V3", "U3", "W2", "V2", "U2", "W1", "V1", and "U1" from one side (R1 side) to the other side (R2 side) in the circumferential direction of the stator 10. The U-phase winding 16U, the V-phase winding 16V, and the W-phase winding 16W are connected in series. The series connection can be a star connection or a delta connection.

[0096] However, in the stator 10 according to the seventh example, the jumper wire 32U extending from the winding end position (i.e., position "U2") is extended to the winding start position (i.e., position "U1"). The winding end portion 35U is inserted into the slot adjacent to the other side of the teeth portion 28U of "U1", into which the winding start end portion 34U is inserted.

[0097] With this configuration, it is possible to eliminate the increase in the number of turns of the winding section 30U by half a turn at positions "U2" and "U1". As a result, the number of turns of the winding section 30U can be made uniform, and the deterioration of the vibration characteristics of the rotating electric machine M can be suppressed compared to when there are areas where the number of turns of the winding section 30U is uneven.

[0098] [Example 8] Next, we will describe the stator 10 related to Example 8.

[0099] Figure 22 shows the wiring diagram of the stator 10 according to the eighth example. In the stator 10 according to the eighth example, in addition to the jumper wire 32U extending from the end of winding position (i.e., position "U2"), the jumper wire 32V extending from the end of winding position (i.e., position "V3") is also extended to the beginning of winding position (i.e., position "V1"). The end terminal portion 35V of the end of winding is inserted into the slot adjacent to the other side of the teeth portion 28U of "V1", into which the beginning terminal portion 34V of winding is inserted.

[0100] Similarly, the jumper wire 32W extending from the end of the winding (i.e., the position of "W3") is also extended to the beginning of the winding (i.e., the position of "W1"). The end of the winding 35W is inserted into the slot adjacent to the other side of the teeth 28W of "W1", into which the beginning of the winding 34W is inserted.

[0101] Even with this configuration, it is possible to eliminate the increase in the number of turns of the winding section 30U by half a turn at positions "U2" and "U1". As a result, the number of turns of the winding section 30U can be made uniform, and the deterioration of the vibration characteristics of the rotating electric machine M can be suppressed compared to the case where there are areas where the number of turns of the winding section 30U is uneven.

[0102] Furthermore, in the stator 10 according to the eighth example, the starting terminals 34U, 34V, and 34W and the ending terminals 35U, 35V, and 35W can be consolidated compared to the seventh example. This simplifies the configuration of the circuit board 22 connected to the starting terminals 34U, 34V, and 34W and the ending terminals 35U, 35V, and 35W.

[0103] In the case of a stator used in a brushless motor with 6 poles and 9 slots (i.e., an odd number of slots), if the multiple winding sections 30 are connected in parallel, they are not connected equally and are therefore excluded from this explanation.

[0104] [Example 9] Next, we will describe the stator 10 related to Example 9.

[0105] Figure 23 shows the wiring diagram of the stator 10 according to the ninth example. The stator 10 according to the ninth example is a stator used in a 10-pole, 15-slot brushless motor. The stator 10 has 15 teeth 28. The 15 teeth 28 are arranged in the following order from one side (R1 side) to the other side (R2 side) in the circumferential direction of the stator 10: "W5", "V5", "U5", "W4", "V4", "U4", "W3", "V3", "U3", "W2", "V2", "U2", "W1", "V1", "U1". The U-phase winding 16U, the V-phase winding 16V, and the W-phase winding 16W are connected in series. The series connection can be a star connection or a delta connection.

[0106] However, in the stator 10 according to the ninth example, the jumper wire 32U extending from the winding end position (i.e., position "U2") is extended to the winding start position (i.e., position "U1"). The winding end portion 35U is inserted into the slot adjacent to the other side of the teeth portion 28U of "U1", into which the winding start end portion 34U is inserted.

[0107] With this configuration, it is possible to eliminate the increase in the number of turns of the winding section 30U by half a turn at positions "U2" and "U1". As a result, the number of turns of the winding section 30U can be made uniform, and the deterioration of the vibration characteristics of the rotating electric machine M can be suppressed compared to when there are areas where the number of turns of the winding section 30U is uneven.

[0108] [Example 10] Next, we will describe the stator 10 related to Example 10.

[0109] Figure 24 shows the wiring diagram of the stator 10 according to the 10th example. In the stator 10 according to the 9th example, not only the jumper wire 32U extending from the end of winding (i.e., position "U2"), but also the jumper wire 32V extending from the end of winding (i.e., position "V5") extends to the beginning of winding (i.e., position "V1"). The end terminal portion 35V of the end of winding is inserted into the slot adjacent to the other side of the teeth portion 28U of "V1", into which the beginning terminal portion 34V of winding is inserted.

[0110] Similarly, the jumper wire 32W extending from the end of the winding (i.e., the position of "W5") is also extended to the beginning of the winding (i.e., the position of "W1"). The end of the winding 35W is inserted into the slot adjacent to the other side of the teeth 28W of "W1", into which the beginning of the winding 34W is inserted.

[0111] Even with this configuration, it is possible to eliminate the increase in the number of turns of the winding section 30U by half a turn at positions "U2" and "U1". As a result, the number of turns of the winding section 30U can be made uniform, and the deterioration of the vibration characteristics of the rotating electric machine M can be suppressed compared to the case where there are areas where the number of turns of the winding section 30U is uneven.

[0112] Furthermore, in the stator 10 according to the 10th example, the starting terminals 34U, 34V, and 34W and the ending terminals 35U, 35V, and 35W can be consolidated compared to the 9th example. This simplifies the configuration of the circuit board 22 connected to the starting terminals 34U, 34V, and 34W and the ending terminals 35U, 35V, and 35W.

[0113] In the case of a stator used in a brushless motor with 10 poles and 15 slots (i.e., an odd number of slots), if the wires are connected in parallel, the multiple winding sections 30 are not connected equally, and therefore this is excluded from the explanation.

[0114] [Example 11] Next, we will describe the stator 10 related to Example 11.

[0115] Figure 25 shows the wiring diagram of the stator 10 according to the 11th example. The stator 10 according to the 11th example is a stator used in a 12-pole, 18-slot brushless motor. The stator 10 has 18 teeth 28. The 18 teeth 28 are arranged in the following order from one side (R1 side) to the other side (R2 side) in the circumferential direction of the stator 10: "W6", "V6", "U6", "W5", "V5", "U5", "W4", "V4", "U4", "W3", "V3", "U3", "W2", "V2", "U2", "W1", "V1", and "U1". The U-phase winding 16U, the V-phase winding 16V, and the W-phase winding 16W are connected in series. The series connection can be a star connection or a delta connection.

[0116] However, in the stator 10 according to the 11th example, the jumper wire 32U extending from the winding end position (i.e., position "U2") is extended to the winding start position (i.e., position "U1"). The winding end portion 35U is inserted into the slot adjacent to the other side of the teeth portion 28U of "U1", into which the winding start end portion 34U is inserted.

[0117] With this configuration, it is possible to eliminate the increase in the number of turns of the winding section 30U by half a turn at positions "U2" and "U1". As a result, the number of turns of the winding section 30U can be made uniform, and the deterioration of the vibration characteristics of the rotating electric machine M can be suppressed compared to when there are areas where the number of turns of the winding section 30U is uneven.

[0118] [Example 12] Next, we will describe the stator 10 related to Example 12.

[0119] Figure 26 shows the wiring diagram of the stator 10 according to the 12th example. Compared to the 11th example, the stator 10 according to the 12th example has not only a jumper wire 32U extending from the winding end position (i.e., position "U2"), but also a jumper wire 32V extending from the winding end position (i.e., position "V6") to the winding start position (i.e., position "V1"). The winding end terminal portion 35V is inserted into the slot adjacent to the other side of the teeth portion 28U of "V1", into which the winding start terminal portion 34V is inserted.

[0120] Similarly, the jumper wire 32W extending from the end of the winding (i.e., the position of "W6") is also extended to the beginning of the winding (i.e., the position of "W1"). The end of the winding 35W is inserted into the slot adjacent to the other side of the teeth 28W of "W1", into which the beginning of the winding 34W is inserted.

[0121] Even with this configuration, it is possible to eliminate the increase in the number of turns of the winding section 30U by half a turn at positions "U2" and "U1". As a result, the number of turns of the winding section 30U can be made uniform, and the deterioration of the vibration characteristics of the rotating electric machine M can be suppressed compared to the case where there are areas where the number of turns of the winding section 30U is uneven.

[0122] Furthermore, in the stator 10 according to the 12th example, the starting terminals 34U, 34V, and 34W and the ending terminals 35U, 35V, and 35W can be consolidated compared to the 11th example. This simplifies the configuration of the circuit board 22 connected to the starting terminals 34U, 34V, and 34W and the ending terminals 35U, 35V, and 35W.

[0123] [Example 13] Next, we will describe the stator 10 related to Example 13.

[0124] Figure 27 shows the wiring diagram of the stator 10 according to the 13th example. In the stator 10 according to the 13th example, the U-phase winding 16U, the V-phase winding 16V, and the W-phase winding 16W are connected in parallel, compared to the 11th example. The parallel connection can be a star connection or a delta connection.

[0125] However, in the stator 10 of the 13th example, compared to the 11th example, the jumper wire 32U of the winding 16Ua extending from the winding end position (i.e., position "U6") is extended to the winding start position (i.e., position "U4"). The end portion 35U of the winding 16Ua is inserted into the slot adjacent to the other side of the teeth portion 28U of "U4", into which the beginning portion 34U of the winding 16Ub is inserted.

[0126] Similarly, the jumper wire 32U of winding 16Ub extending from the winding end position (i.e., position "U3") is extended to the winding start position (i.e., position "U1"). The end portion 35U of winding 16Ub is inserted into the slot adjacent to the other side of the teeth portion 28U of "U1", into which the beginning portion 34U of winding 16Ua is inserted.

[0127] With this configuration, it is possible to eliminate the increase in the number of turns of the winding section 30U by half a turn at positions "U6", "U3", "U5", and "U2". As a result, the number of turns of the winding section 30U can be made uniform, and the deterioration of the vibration characteristics of the rotating electric machine M can be suppressed compared to when there are areas where the number of turns of the winding section 30U is uneven.

[0128] [Example 14] Next, we will describe the stator 10 related to Example 14.

[0129] Figure 28 shows the wiring diagram of the stator 10 according to the 14th example. Compared to the 13th example, the stator 10 according to the 14th example has not only the jumper wires 32U of winding 16Ua extending from the winding end position (i.e., position "U5") and the jumper wires 32U of winding 16Ub extending from the winding end position (i.e., position "U2"), but also the jumper wire 32V of winding 16Va extending from the winding end position (i.e., position "V3"), which extends to the winding start position (i.e., position "V4"). The end portion 35V of winding 16Va is inserted into the slot adjacent to the other side of the teeth portion 28V of "V4", into which the beginning portion 34V of winding 16Vb is inserted.

[0130] Furthermore, the jumper wire 32V of winding 16Vb, which extends from the end of the winding (i.e., the position of "V6"), is extended to the beginning of the winding (i.e., the position of "V1"). The end portion 35V of winding 16Vb is inserted into the slot adjacent to the other side of the tooth portion 28V of "V1", into which the beginning portion 34V of winding 16Va is inserted.

[0131] Similarly, the jumper wire 32W of winding 16Wa, which extends from the end of the winding (i.e., position "W3"), is also extended to the beginning of the winding (i.e., position "W4"). The end terminal portion 35W of winding 16Wa is inserted into the other slot adjacent to the tooth portion 28V of "W4", into which the beginning terminal portion 34W of winding 16Wb is inserted.

[0132] Furthermore, the jumper wire 32W of winding 16Wb, which extends from the end of the winding (i.e., the position "W6"), is extended to the beginning of the winding (i.e., the position "W1"). The end portion 35W of winding 16Wb is inserted into the slot adjacent to the other side of the tooth portion 28V of "W1", into which the beginning portion 34W of winding 16Wa is inserted.

[0133] Even with this configuration, it is possible to eliminate the increase in the number of turns of the winding section 30U by half a turn at positions "U6", "U3", "U5", and "U2". As a result, the number of turns of the winding section 30U can be made uniform, and the deterioration of the vibration characteristics of the rotating electric machine M can be suppressed compared to the case where there are areas where the number of turns of the winding section 30U is uneven.

[0134] Furthermore, in the stator 10 according to the 14th example, the starting terminals 34U, 34V, and 34W and the ending terminals 35U, 35V, and 35W can be consolidated compared to the 13th example. This simplifies the configuration of the circuit board 22 connected to the starting terminals 34U, 34V, and 34W and the ending terminals 35U, 35V, and 35W.

[0135] [Example 15] Next, we will describe the stator 10 related to Example 15.

[0136] Figure 29 shows the wiring diagram of the stator 10 according to the 15th example. In the stator 10 according to the 15th example, the U-phase winding 16U, the V-phase winding 16V, and the W-phase winding 16W are connected in series. The series connection can be a star connection or a delta connection.

[0137] The 15th example is a configuration of 2n poles and 3n slots in which only the end portion 35U of the winding is inserted into the slot adjacent to the other side of the tooth portion 28U in which the beginning portion 34U of the winding is inserted into the slot adjacent to one side. Here, n is an integer of 2 or more.

[0138] For n=2, i.e., the stator 10 used in a 4-pole, 6-slot brushless motor, it is as described in Example 5 (see Figure 19). For n=3, i.e., the stator 10 used in a 6-pole, 9-slot brushless motor, it is as described in Example 7 (see Figure 21). For n=4, i.e., the stator 10 used in an 8-pole, 12-slot brushless motor, it is as described in Example 1 (see Figure 10). For n=5, i.e., the stator 10 used in a 10-pole, 15-slot brushless motor, it is as described in Example 9 (see Figure 23). For n=6, i.e., the stator 10 used in a 12-pole, 18-slot brushless motor, it is as described in Example 11 (see Figure 25). n may also be 7 or greater.

[0139] In the intermediate region located between the teeth portions 28 of "U1", "V1", and "W1" and the teeth portions 28 of "U3n", "V3n", and "W3n", n-2 sets are arranged, assuming that one set consists of the teeth portions 28U of the U, V, and W phases. However, if (n-2) < 0, then 0 sets are arranged in the intermediate region A. Even with this configuration, the same effects as the above examples that satisfy the condition of 2n poles and 3n slots can be achieved.

[0140] [Example 16] Next, we will describe the stator 10 related to Example 16.

[0141] Figure 30 shows the wiring diagram of the stator 10 according to the 16th example. The 16th example differs from the 15th example in that, in a 2n pole 3n slot configuration, the end portions 35V and 35W of the winding are also inserted into the slot adjacent to the other side of the teeth portions 28V and 28W, which have their beginning end portions 34V and 34W inserted into the slot adjacent to one side. Here, n is an integer of 2 or more.

[0142] For n=2, i.e., the stator 10 used in a 4-pole, 6-slot brushless motor is as described in Example 6 (see Figure 20). For n=3, i.e., the stator 10 used in a 6-pole, 9-slot brushless motor is as described in Example 8 (see Figure 22). For n=4, i.e., the stator 10 used in an 8-pole, 12-slot brushless motor is as described in Example 2 (see Figure 13). For n=5, i.e., the stator 10 used in a 10-pole, 15-slot brushless motor is as described in Example 10 (see Figure 24). For n=6, i.e., the stator 10 used in a 12-pole, 18-slot brushless motor is as described in Example 12 (see Figure 26). n may also be 7 or greater.

[0143] In the intermediate region located between the teeth portions 28 of "U1", "V1", and "W1" and the teeth portions 28 of "U3n", "V3n", and "W3n", n-2 sets are arranged, assuming that one set consists of the teeth portions 28U of the U, V, and W phases. However, if (n-2) < 0, then 0 sets are arranged in the intermediate region A. Even with this configuration, the same effects as the above examples that satisfy the condition of 2n poles and 3n slots can be achieved.

[0144] [Example 17] Next, we will describe the stator 10 related to Example 17.

[0145] Figure 31 shows the wiring diagram of the stator 10 according to the 17th example. In the stator 10 according to the 17th example, the U-phase winding 16U, the V-phase winding 16V, and the W-phase winding 16W are connected in parallel. The parallel connection can be a star connection or a delta connection.

[0146] The 17th example is a configuration of 4m poles and 6m slots, in which only the end portion 35U at the end of the winding is inserted into the slot adjacent to the other side of the tooth portion 28U, in which the beginning portion 34U at the start of the winding is inserted into the slot adjacent to one side. Here, n is an integer of 2 or more.

[0147] For the case where m = 2, i.e., the stator 10 used in an 8-pole, 12-slot brushless motor, it is as described in the third example (see Figure 15). For the case where m = 3, i.e., the stator 10 used in a 12-pole, 18-slot brushless motor, it is as described in the thirteenth example (see Figure 27). m may also be 4 or greater.

[0148] In the intermediate region located between the teeth 28s "U1", "V1", and "W1" and the teeth 28s "U3m", "V3m", and "W3m", m-2 sets are arranged, where one set consists of the teeth 28U of the U, V, and W phases. However, if (m-2) < 0, then 0 sets are arranged in the intermediate region A. Even with this configuration, the same effects as the above examples that satisfy the conditions of 4m poles and 6m slots can be achieved.

[0149] [Example 18] Next, we will describe the stator 10 related to Example 18.

[0150] Figure 32 shows the wiring diagram of the stator 10 according to the 18th example. The 18th example differs from the 17th example in that, in a configuration of 4m poles and 6m slots, the end portions 35V and 35W of the winding are also inserted into the slots adjacent to the other side of the teeth portions 28V and 28W, which are inserted into the slots adjacent to the beginning portions 34V and 34W of the winding. Here, m is an integer of 2 or more.

[0151] For the case where m = 2, i.e., the stator 10 used in an 8-pole, 12-slot brushless motor, it is as described in the 4th example (see Figure 18). For the case where m = 3, i.e., the stator 10 used in a 12-pole, 18-slot brushless motor, it is as described in the 14th example (see Figure 28). m may also be 4 or greater.

[0152] In the intermediate region located between the teeth 28s "U1", "V1", and "W1" and the teeth 28s "U3m", "V3m", and "W3m", m-2 sets are arranged, where one set consists of the teeth 28U of the U, V, and W phases. However, if (m-2) < 0, then 0 sets are arranged in the intermediate region A. Even with this configuration, the same effects as the above examples that satisfy the conditions of 4m poles and 6m slots can be achieved.

[0153] [Example 19] Next, we will describe the stator 10 related to Example 19.

[0154] Figure 33 shows an enlarged plan view of the main part of the stator 10 according to the 19th example, and Figure 34 shows a wiring diagram of the stator 10 according to the 19th example. In Figures 33 and 34, the configuration of the 19th example is shown in comparison with the 1st example. That is, in Figure 33, the left side shows the 1st example, and the right side shows the 19th example. Similarly, in Figure 34, the left side shows the 1st example, and the right side shows the 19th example.

[0155] In the first example, the winding portion continuous with the ending end portion 35U is not wound around the teeth portion 28U of "U1" before the ending end portion 35U is inserted into the slot adjacent to the other tooth portion 28U of "U1" in which the beginning end portion 34U is inserted into the slot adjacent to the other tooth portion 28U of "U1". In contrast, in the 19th example, the winding portion continuous with the ending end portion 35U is wound around the teeth portion 28U of "U1" before the ending end portion 35U is inserted into the slot adjacent to the other tooth portion 28U of "U1".

[0156] In the first example, the number of additional windings Z (including the terminal portion 35U at the end of the winding) inserted into the slot adjacent to the other side of the teeth portion 28U of "U1" is 1 (Z = 1). In contrast, in the 19th example, the number of additional windings Z (including the terminal portion 35U at the end of the winding and the winding portion 33) inserted into the slot adjacent to the other side of the teeth portion 28U of "U1" can be any number as long as 1 ≤ Z ≤ N - 1 is satisfied. Here, N is the number of turns when the winding portion 30U wound around the teeth portion 28U of "U1" is completed. The winding portion 33 is included in the winding portion 30 and only needs to be wound around the teeth portion 28U of "U1" by one turn or more.

[0157] However, continuously winding the winding 16U onto the teeth portion 28U of "U1" which already has the winding 16U wound around it presents a high difficulty in positioning the winding 16U. Therefore, when winding the winding 16U onto the teeth portion 28U of "U1", the winding is stopped at a number of turns that makes positioning easier, then the winding is moved on to another teeth portion 28U, and then the winding 16U (winding portion 33) is wound onto the teeth portion 28U of "U1", thereby enabling the reliable retention of the winding 16U.

[0158] Furthermore, if the winding portion continuous with the end portion 35U is not wound around the teeth portion 28U of "U1" before the end portion 35U is inserted into the slot adjacent to the other side of the teeth portion 28U of "U1", the end portion 35U may loosen. In contrast, as in the 19th example, if the winding portion continuous with the end portion 35U is wound around the teeth portion 28U of "U1" before the end portion 35U is inserted into the slot adjacent to the other side of the teeth portion 28U of "U1", the loosening of the end portion 35U can be suppressed.

[0159] Furthermore, it is desirable that the number of turns of the winding portion 30 of the winding 16 in each tooth portion 28 of the U-phase, V-phase, and W-phase (the number of turns of the winding portion 30 in all tooth portions 28) be the same. By doing so, it is possible to suppress the deterioration of the vibration characteristics of the rotating electric machine M compared to the case where there are areas where the number of turns of the winding portion 30 is uneven.

[0160] Furthermore, the configuration of Example 19 is applicable not only to Example 1, but also to Examples 2 through 18. In addition, the configuration of Example 19 is applicable not only to the U-phase winding 16U, but also to the V-phase winding 16V and the W-phase winding 16W.

[0161] Furthermore, in each of the above examples, the number of magnetic poles and the number of slots may be other than those specified above, as long as the ratio of the number of slots of the stator 10 to the number of magnetic poles of the rotor 11 is 1.5 and the number of slots is even.

[0162] Furthermore, in each of the above examples, the V-phase, U-phase, and W-phase assigned to the multiple stator configuration units 12 may be other than those described above.

[0163] Although one embodiment of the technology of this disclosure has been described above, the present invention is not limited to the above, and it is of course possible to implement it in various modified forms without departing from the spirit of the invention.

[0164] The following are additional notes regarding the technology of the present disclosure. (Additional Claim 3) The stator according to claim 1 or claim 2, wherein the winding has a first winding and a second winding connected in parallel, and in the second stator configuration unit, the starting end of the second winding (16Ub) is inserted into a slot adjacent to one of the plurality of teeth, and the ending end of the first winding (16Ua) is inserted into a slot adjacent to the other of the first teeth. (Additional Claim 4) Each stator configuration unit comprises: a plurality of core component members (14) divided into a plurality of tooth sections and constituting a stator core; a plurality of insulating sections (36) attached to the plurality of core component members and insulating the core component members from the winding section; and an insulator (18) formed along the circumferential direction of the stator and connecting section (38) connecting the plurality of insulating sections, wherein each connecting section is positioned to overlap with the stator core in the axial direction of the stator; the first stator configuration unit comprises a third stator configuration unit (12V) and a fourth stator configuration unit (12W), the third stator configuration unit is a stator configuration unit assembled to the fourth stator configuration unit from one side in the axial direction of the stator; The stator according to any one of claims 1 to 3, wherein the connecting portion of the third stator component unit has a movable portion (40) that moves the core component of the fourth stator component unit from a position retracted radially outward of the stator than the connecting portion of the fourth stator component unit toward a position aligned on the same circumference as the core component of the fourth stator component unit toward a position aligned radially inward of the stator. (Addendum claim 5) The stator according to any one of claims 1 to 4, wherein the jumper wire is led out from the winding portion in a direction that tightens the winding portion. (Addendum claim 6) The stator according to any one of claims 1 to 5, wherein in the second stator component unit, a winding portion (33) continuous with the winding end portion is wound around the first teeth portion for one or more turns before the winding end portion is inserted into a slot adjacent to one of the first teeth portions.(Addendum Claim 7) The stator according to any one of Claims 1 to 6, wherein the number of turns of the winding in each of the teeth is the same. (Addendum Claim 8) A rotating electric machine (M) comprising: a stator according to any one of Claims 1 to 7; a rotor (11) housed radially inside the stator, wherein the ratio of the number of slots of the stator to the number of magnetic poles of the rotor is 1.5, and the number of slots is even. (Addendum Claim 9) The rotating electric machine according to Claim 8, comprising: a circuit board (22) arranged on one axial side of the stator and connected to the starting end portion of the winding and the ending end portion of the winding.

Claims

1. A stator (10) comprising stator component units (12) divided into multiple phases (U, V, W), wherein each stator component unit has multiple teeth (28) and a winding (16), the winding having multiple windings (30) wound around each of the multiple teeth, a connecting wire (32) connecting the multiple windings in the circumferential direction of the stator, a starting end (34) extending to one axial side of the stator, and a ending end (35) extending to one axial side of the stator, wherein in the first stator component unit (12V, 12W) among the multiple stator component units, the connecting wire is located on one axial side of the stator. In the second stator component unit (12U) of the plurality of stator component units, the jumper wire is located on the other axial side of the stator, and the end of the winding (35U) is inserted into a slot adjacent to the other of the first teeth portion into which the beginning of the winding (34U) is inserted.

2. The stator according to claim 1, wherein in the first stator configuration unit, the winding end portion (35V, 35W) is inserted into a slot adjacent to the other of the second teeth portion, into which the winding start end portion (34V, 34W) is inserted.

3. The stator according to claim 1 or claim 2, wherein the windings have a first winding and a second winding connected in parallel, and in the second stator configuration unit, the starting end of the second winding (16Ub) is inserted into a slot adjacent to one of the plurality of teeth, and the ending end of the first winding (16Ua) is inserted into a slot adjacent to the other of the first teeth.

4. Each stator component unit is divided into a plurality of tooth sections and comprises a plurality of core components (14) constituting a stator core, a plurality of insulating sections (36) attached to the plurality of core components and insulating the core components from the winding section, and an insulator (18) formed along the circumferential direction of the stator and connecting the plurality of insulating sections, wherein each connecting section is positioned to overlap with the stator core in the axial direction of the stator, and the first stator component unit comprises a third stator component unit (12V) and a fourth stator component unit (12W), the third stator component unit being assembled to the fourth stator component unit from one side in the axial direction of the stator, The stator according to any one of claims 1 to 3, wherein the connecting portion of the third stator component unit has a movable portion (40) that moves the core component of the fourth stator component unit from a position retracted radially outward of the stator than the connecting portion of the fourth stator component unit toward a position aligned with the core component of the fourth stator component unit toward a position aligned on the same circumference as the core component of the fourth stator component unit.

5. The stator according to any one of claims 1 to 4, wherein the connecting wire is led out from the winding portion in a direction that tightens the winding portion.

6. The stator according to any one of claims 1 to 5, wherein in the second stator configuration unit, a winding portion (33) continuous with the winding end portion is wound around the first teeth portion for one or more turns before the winding end portion is inserted into a slot adjacent to one of the first teeth portions.

7. The number of turns of the winding portion in each of the teeth portions is the same, the stator according to any one of claims 1 to 6.

8. A rotating electric machine (M) comprising: a stator according to any one of claims 1 to 7; and a rotor (11) housed radially inward of the stator, wherein the ratio of the number of slots of the stator to the number of magnetic poles of the rotor is 1.5, and the number of slots is even.

9. The rotating electric machine according to claim 8, further comprising a circuit board (22) arranged on one axial side of the stator and connected to the starting end portion and the ending end portion of the winding.

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