阅读说明：本技术 旋转电机的定子 (Stator of rotating electric machine ) 是由 关喜亮 姉齿美沙 吉田秀幸 今村健广 于 2019-07-10 设计创作，主要内容包括：本发明提供一种旋转电机的定子,其即使在将电力转换装置配置到旋转电机的上方的情况下,也能够降低旋转电机的定子上方的高度。旋转电机(1)的定子(12)具备定子铁心(121)、线圈(122)、以及多根母线(30U、30V、30W)。从旋转电机的旋转轴(CL)方向观察时,母线的第一端子部(301U、301V、301W)在大致上下方向上排列配置在定子铁心的径向外侧,母线的第二端子部(302U、302V、302W)在大致水平方向上排列配置在比定子铁心靠上方的位置,在母线的第一端子部中,配置在最上方的第一端子部(301U)以位于比定子铁心的最上部(121T)靠下方的位置的方式配置。(The invention provides a stator of a rotating electric machine, which can reduce the height above the stator of the rotating electric machine even if a power conversion device is arranged above the rotating electric machine. A stator (12) of a rotating electrical machine (1) is provided with a stator core (121), a coil (122), and a plurality of bus bars (30U, 30V, 30W). First terminal portions (301U, 301V, 301W) of the bus bar are arranged substantially vertically outside the stator core in the radial direction when viewed from the direction of the rotating shaft (CL) of the rotating electrical machine, second terminal portions (302U, 302V, 302W) of the bus bar are arranged substantially horizontally above the stator core, and the first terminal portion (301U) arranged uppermost among the first terminal portions of the bus bar is arranged so as to be positioned below the uppermost portion (121T) of the stator core.)

1. A stator of a rotating electric machine is provided with:

a stator core;

a coil attached to the stator core;

a plurality of bus bars each having a first terminal portion provided at one end portion and electrically connected to a terminal portion of each phase of the coil, and a second terminal portion provided at the other end portion and electrically connected to a terminal portion of the power conversion device corresponding to each phase of the coil,

when viewed from the direction of the rotation axis of the rotating electrical machine,

the first terminal portions of the plurality of bus bars are arranged substantially vertically outside the stator core in the radial direction,

the second terminal portions of the plurality of bus bars are arranged substantially horizontally above the stator core,

among the first terminal portions of the plurality of bus bars, the first terminal portion disposed uppermost is disposed so as to be located below an uppermost portion of the stator core.

2. The stator of the rotating electric machine according to claim 1,

the first terminal portion disposed at the lowermost position among the first terminal portions of the plurality of bus bars is disposed so as to be located above the rotation shaft.

3. The stator of the rotating electric machine according to claim 1 or 2,

at least a part of the first terminal portions of the plurality of bus bars is located on a center side with respect to an outermost end portion of the stator core in the horizontal direction.

4. The stator of the rotating electric machine according to any one of claims 1 to 3,

the bus bar has a first extension portion, a second extension portion, and a third extension portion extending in three directions perpendicular to each other.

5. The stator of the rotating electric machine according to claim 4,

the first extension extends in the direction of the rotation axis,

the second extension portion extends in the vertical direction when viewed from the rotation axis direction,

the third extending portion extends in a horizontal direction when viewed from the rotation axis direction.

6. The stator of the rotating electric machine according to claim 5,

the third extending portion extends in a horizontal direction when viewed from the rotation axis direction above the stator core, and the third extending portions of the plurality of bus bars are arranged at the same height.

7. The stator of the rotating electric machine according to any one of claims 1 to 6,

the stator of the rotating electric machine further includes a cover member that collectively covers the plurality of bus bars.

8. The stator of the rotating electric machine according to claim 7,

each of the bus bars is provided with a bending part,

the cover member includes a cover portion that covers at least a periphery of the bent portion, and a cover fixing portion that attaches the cover portion to the support member,

the cover member is configured not to contact the plurality of bus bars in a state where the cover fixing portion is attached to the support member.

9. The stator of the rotating electric machine according to any one of claims 1 to 8,

the rotating electric machine is mounted on a vehicle,

the first terminal portion is disposed on a front-rear direction center side of the vehicle with respect to the rotation shaft of the rotating electric machine.

Technical Field

The present invention relates to a stator of a rotating electric machine mounted on an electric vehicle or the like.

Background

Conventionally, a rotating electric machine is mounted as a drive source in an electric vehicle or the like. For example, patent document 1 discloses a stator of a rotating electric machine mounted on an electric vehicle, a hybrid vehicle, or the like. The stator of the rotating electric machine disclosed in patent document 1 includes a stator core, a coil attached to the stator core, and a plurality of bus bars corresponding to the respective coils, and the plurality of bus bars include one end side terminal portions of the bus bars electrically connected to the phase terminal portions of the coils, and the other end side terminal portions of the bus bars electrically connected to the terminal portions of the power conversion devices.

Prior art documents

Patent document 1: japanese patent laid-open publication No. 2016-096663

However, in the stator of the rotating electric machine of patent document 1, one end side terminal portion of the bus bar electrically connected to the phase terminal portions of the coil and the other end side terminal portion of the bus bar electrically connected to the terminal portion of the power conversion device are both located above the stator. In this case, since the phase terminal portions of the coil protrude upward from the stator and the terminal portion on the one end side of the bus bar similarly protrudes above the stator, the bus bar is disposed above the uppermost portion of the stator core with a predetermined gap therebetween. Therefore, the height of the upper portion of the stator is increased in the entire rotating electric machine, and there is a problem that the passenger space and the storage compartment space become narrow when the rotating electric machine is mounted in a vehicle.

Disclosure of Invention

The invention provides a stator of a rotating electric machine, which can reduce the height above the stator of the rotating electric machine even if a power conversion device is arranged above the rotating electric machine.

The stator of a rotating electric machine according to the present invention includes:

a stator core;

a coil attached to the stator core;

a plurality of bus bars each having a first terminal portion provided at one end portion and electrically connected to a terminal portion of each phase of the coil, and a second terminal portion provided at the other end portion and electrically connected to a terminal portion of the power conversion device corresponding to each phase of the coil,

when viewed from the direction of the rotation axis of the rotating electrical machine,

the first terminal portions of the plurality of bus bars are arranged substantially vertically outside the stator core in the radial direction,

the second terminal portions of the plurality of bus bars are arranged substantially horizontally above the stator core.

Among the first terminal portions of the plurality of bus bars, the first terminal portion disposed uppermost is disposed so as to be located below an uppermost portion of the stator core.

Effects of the invention

According to the present invention, even when the power conversion device is disposed above the rotating electric machine, the height above the stator of the rotating electric machine can be reduced.

Drawings

Fig. 1 is a perspective view showing the entire structure of a rotating electric machine on which a stator of the rotating electric machine according to an embodiment of the present invention is mounted.

Fig. 2 is a view of the stator of the rotating electric machine of fig. 1 viewed from above.

Fig. 3 is a view of the stator of the rotating electric machine of fig. 2 viewed from above with the upper cover of the cover member removed.

Fig. 4 is a sectional view a-a of the bus bar unit of fig. 2.

Fig. 5 is a view of the stator of the rotating electric machine of fig. 1 viewed from the direction of the rotation axis.

Description of reference numerals:

1 rotating an electric machine;

11 a housing (support member);

12 a stator;

121 a stator core;

121T uppermost;

121L left extreme;

122 coils;

30U, 30V, 30W bus;

301U, 301V, 301W first terminal portions;

302U, 302V, 302W second terminal portion;

311U, 311V, 311W first extension;

312U, 312V, 312W second extension;

313U, 313V, 313W third extension;

314U, 314V, 314W fourth extension;

315U, 315V, 315W fifth extension;

321U, 321V, 321W first bent portions;

322U, 322V, 322W second bending section;

323U, 323V, 323W third bent portion (bent portion);

324U, 324V, 324W fourth bend;

40 a cover member;

41a cover base;

41a holding part;

41b cover fixing parts;

42 cover part;

CL rotates the shaft.

Detailed Description

Hereinafter, an embodiment of a stator of a rotating electric machine according to the present invention will be described with reference to the drawings.

First, the entire structure of a rotating electric machine on which a stator according to an embodiment of the present invention is mounted will be described with reference to fig. 1. A rotating electrical machine 1 shown in fig. 1 is a running motor mounted on a vehicle such as a hybrid vehicle or an electric vehicle. However, the configuration of the present invention is not limited to the motor for running, and can be applied to a motor for power generation, a motor for other applications, or a rotating electrical machine (including a generator) other than a vehicle.

In the present specification, for the sake of simplicity of explanation, as shown in the drawing, the front, the rear, the right, the left, the upper, the U, and the lower of the rotating electric machine 1 are defined, and the front is Fr, the rear is Rr, the right is R, the left is L, the upper is U, and the lower is D. However, the direction shown in the drawing is not related to the direction of a vehicle or the like on which the rotating electric machine 1 is mounted.

As shown in fig. 1, the rotating electric machine 1 includes a stator 12, a rotor 13, and a casing 11 that houses the stator 12 and the rotor 13. The rotor 13 has a circular ring shape and is externally fitted into a shaft (not shown). The stator 12 includes a stator core 121, a coil 122 attached to the stator core 121, and a bus bar unit 3. Inside the housing 11, in addition to the stator 12 and the rotor 13, a first terminal plate 51 for supplying electric power to the coil 122 is provided at the upper left, and a second terminal plate 52 for connecting a bus bar on the power conversion device 2 side is provided at the upper side. The bus bar unit 3 electrically connects the first terminal plate 51 and the second terminal plate 52 inside the housing 11.

The stator core 121 is formed in a cylindrical shape surrounding the rotor 13 from the radially outer side, and is fixed to the housing 11 by fastening members such as bolts.

The coil 122 is a 3-phase coil composed of U-phase, V-phase, and W-phase. The coil 122 may be a segmented coil or may be a continuous winding.

The bus bar unit 3 includes three bus bars 30U, 30V, and 30W, and a cover member 40 collectively covering the three bus bars 30U, 30V, and 30W.

As shown in fig. 1 to 4, the three bus bars 30U, 30V, and 30W extend in a strip shape from the first terminal plate 51 electrically connected to the coil 122 to the second terminal plate 52 electrically connected to the power converter 2.

The three bus bars 30U, 30V, and 30W each include: first terminal portions 301U, 301V, 301W; first extending portions 311U, 311V, 311W extending forward from the first terminal portions 301U, 301V, 301W; first bent portions 321U, 321V, and 321W bent upward from the front end portions of the first extending portions 311U, 311V, and 311W; second extending portions 312U, 312V, 312W extending upward from the first bent portions 321U, 321V, 321W; second bent portions 322U, 322V, 322W bent rightward from upper end portions of the second extending portions 312U, 312V, 312W; third extending portions 313U, 313V, 313W extending rightward from the second bent portions 322U, 322V, 322W; third bent portions 323U, 323V, 323W bent forward from right end portions of the third extending portions 313U, 313V, 313W; fourth extending portions 314U, 314V, and 314W extending forward from the third bent portions 323U, 323V, and 323W; fourth bent portions 324U, 324V, 324W bent upward from the front end portions of the fourth extending portions 314U, 314V, 314W; fifth extending portions 315U, 315V, 315W extending upward from the fourth bent portions 324U, 324V, 324W; and second terminal portions 302U, 302V, 302W connected to the fifth extending portions 315U, 315V, 315W.

The three bus bars 30U, 30V, and 30W are arranged in parallel with extending portions 311U to 315U, 311V to 315V, and 311W to 315W, respectively, while maintaining a predetermined interval.

The extending portions 311U to 315U, 311V to 315V, and 311W to 315W do not need to extend linearly, and may have an inclined portion in the middle. The third extension portions 313U, 313V, 313W of the present embodiment include: forward-inclined portions 313Ua, 313Va, 313Wa which incline forward as going from the left side to the right side; and inclined portions 313Ub, 313Vb, 313Wb which incline upward from the left side toward the right side.

The first terminal portions 301U, 301V, and 301W are arranged substantially vertically in the first terminal plate 51 arranged radially outward of the stator core 121, the second terminal portions 302U, 302V, and 302W are arranged substantially horizontally in the second terminal plate 52, and the second terminal plate 52 is arranged above the stator core 121.

The arrangement of the three bus bars 30U, 30V, and 30W may be set as appropriate, but in the present embodiment, the first terminal portions 301U, 301V, and 301W are arranged in this order from the top to the bottom, and the second terminal portions 302U, 302V, and 302W are arranged in this order from the right to the left on the second terminal plate 52.

The first terminal portions 301U, 301V, and 301W have holes 301Ua, 301Va, and 301Wa into which bolts 931U, 931V, and 931W are inserted in a plane substantially perpendicular to the front-rear direction, and the bolts 931U, 931V, and 931W are inserted into the holes 301Ua, 301Va, and 301Wa from behind and thereby are fastened to the first terminal plate 51. The first terminal portions 301U, 301V, and 301W are electrically connected to terminal portions (not shown) provided at coil terminal portions 123U, 123V, and 123W (see fig. 5) extending from the U-phase, V-phase, and W-phase coils 122, respectively, via the first terminal plate 51.

The second terminal portions 302U, 302V, and 302W are fastened and coupled to the second terminal plate 52 by inserting bolts 932U, 932V, and 932W from above on a plane substantially perpendicular to the vertical direction. Then, the second terminal portions 302U, 302V, and 302W are electrically connected to terminal portions (not shown) of the U-phase, V-phase, and W-phase power conversion devices 2 via the second terminal plate 52.

As described above, the three bus bars 30U, 30V, and 30W include: first extending portions 311U, 311V, 311W and fourth extending portions 314U, 314V, 314W that extend in the front-rear direction, i.e., in the direction of the rotation axis CL of the rotary electric machine 1; second extending portions 312U, 312V, and 312W and fifth extending portions 315U, 315V, and 315W that extend in the vertical direction when viewed from the direction of the rotation axis CL of the rotating electric machine 1; and third extending portions 313U, 313V, 313W that extend in the horizontal direction when viewed from the direction of the rotation axis CL of the rotating electrical machine 1.

Therefore, when the first terminal portions 301U, 301V, and 301W and the second terminal portions 302U, 302V, and 302W are fastened and coupled to the first terminal plate 51 and the second terminal plate 52, even if there is a manufacturing error in the bus bars 30U, 30V, and 30W, it is possible to disperse stress in each of three directions perpendicular to each other, that is, the direction of the rotation axis CL of the rotating electrical machine 1, the vertical direction when viewed from the direction of the rotation axis CL, and the horizontal direction when viewed from the direction of the rotation axis CL. This can reduce the cross-sectional area of the bus bars 30U, 30V, and 30W, and therefore can reduce the cost of the bus bars 30U, 30V, and 30W. Moreover, the bus bars 30U, 30V, and 30W can be arranged along the side surfaces of the stator 12, and therefore space efficiency is excellent.

As shown in fig. 5, third extending portions 313U, 313V, 313W extend horizontally above stator core 121 when viewed from the direction of rotation axis CL of rotating electric machine 1. Among the first terminal portions 301U, 301V, and 301W, the first terminal portion 301U disposed uppermost is disposed below the uppermost portion 121T of the stator core 121.

Thus, the three bus bars 30U, 30V, and 30W can dispose the third extending portions 313U, 313V, and 313W extending in the horizontal direction as viewed from the direction of the rotation axis CL of the rotating electrical machine 1 above the stator core 121 without a predetermined interval, and therefore, even when the power converter 2 is disposed above the rotating electrical machine 1, the height above the stator 12 in the rotating electrical machine 1 can be reduced.

The third extending portions 313U, 313V, and 313W of the three bus bars 30U, 30V, and 30W are arranged at the same height so as to extend in the horizontal direction when viewed from the direction of the rotation axis CL of the rotating electric machine 1.

Accordingly, the third extending portions 313U, 313V, 313W of the three bus bars 30U, 30V, 30W are all disposed above the stator core 121 without a predetermined interval, and therefore the height above the stator 12 in the rotating electrical machine 1 can be reduced.

On the other hand, of the first terminal portions 301U, 301V, and 301W, the first terminal portion 301W disposed lowermost is disposed so as to be located above the rotation shaft CL of the rotating electric machine 1.

This reduces the height above the stator 12 in the rotating electrical machine 1, and prevents the three bus bars 30U, 30V, and 30W from becoming long.

The first terminal portions 301U, 301V, and 301W of the three bus bars 30U, 30V, and 30W are positioned on the center side of the left-side outermost portion 121L of the stator core 121 in the horizontal direction when viewed from the direction of the rotation axis CL of the rotating electric machine 1. In the present embodiment, the left end surface of each of the first terminal portions 301U, 301V, and 301W is arranged at substantially the same position as the left outermost end portion 121L of the stator core 121 in the horizontal direction when viewed from the direction of the rotation axis CL of the rotating electric machine 1.

Therefore, the first terminal portions 301U, 301V, and 301W are arranged so as not to protrude from the stator core 121 in the horizontal direction when viewed from the direction of the rotation axis CL of the rotating electrical machine 1. As a result, the first extending portions 311U, 311V, 311W extending forward from the first terminal portions 301U, 301V, 301W can be disposed on the center side of the left-side outermost end portion of the stator core 121 in the horizontal direction when viewed from the direction of the rotation axis CL of the rotating electrical machine 1. Accordingly, all of the bus bars 30U, 30V, and 30W can be arranged on the center side of the left-side outermost end portion of the stator core 121, and therefore the horizontal length of the stator 12 of the rotating electric machine 1 can be reduced.

In the present embodiment, all the first terminal portions 301U, 301V, and 301W are located on the center side of the left-side outermost end portion of the stator core 121, but at least some of the first terminal portions 301U, 301V, and 301W may be located on the center side of the left-side outermost end portion of the stator core 121 in the horizontal direction when viewed from the direction of the rotation axis CL of the rotating electrical machine 1. Accordingly, the bus bars 30U, 30V, and 30W can be arranged on the horizontal center side as compared with the case where the first terminal portions 301U, 301V, and 301W are arranged outside the left-most end portion of the stator core 121, and therefore the horizontal length of the stator 12 of the rotating electric machine 1 can be reduced.

As shown in fig. 2 to 4, the cover member 40 covers a portion of the right end side of the inclined portions 313Ub, 313Vb, 313Wb of the third extending portions 313U, 313V, 313W, the third bent portions 323U, 323V, 323W, and the fourth extending portions 314U, 314V, 314W. The three bus bars 30U, 30V, and 30W are arranged in the same plane inside the cover member 40.

In this way, since the third bent portions 323U, 323V, 323W of the bus bars 30U, 30V, 30W are covered with the cover member 40, even if the bus bars 30U, 30V, 30W are relatively moved in the front-rear direction, the left-right direction, and the up-down direction, the third bent portions 323U, 323V, 323W are caught by the cover member 40 and cannot be detached from the cover member 40. Therefore, after the assembly of the bus bar unit 3, the three bus bars 30U, 30V, and 30W can be handled as one body by the cover member 40.

The cover member 40 includes a cover base 41 attached to the housing 11 of the rotating electric machine 1, and a cover 42 covering the three bus bars 30U, 30V, and 30W. The cover 42 includes an upper cover 42U covering the three bus bars 30U, 30V, and 30W from above, and a lower cover 42L covering the three bus bars 30U, 30V, and 30W from below.

The lower cover 42L has a bottom surface 420, end wall portions 420a provided upright on right and rear end portions of the bottom surface 420, and end wall portions 420b provided upright on left end portions of the bottom surface 420, in the width direction of the three bus bars 30U, 30V, and 30W arranged in parallel on the same plane. The lower cover 42L is provided with a first partition 421 disposed between the bus bar 30U and the bus bar 30V, and a second partition 422 disposed between the bus bar 30V and the bus bar 30W.

Further, a pair of engagement claws 421a, 422a extending upward are provided on the tip side of the fourth extending portions 314U, 314V, 314W of the first partition wall 421 and the second partition wall 422.

The upper cover 42U has: an upper surface 423 facing the bottom surface 420 of the lower cover 42L; and an outer peripheral wall 423a extending downward from the upper surface 423 and surrounding the end wall portions 420a and 420b of the lower cover 42L. The upper cover 42U is provided with a pair of engagement holes 421b and 422b that engage with the engagement claws 421a and 422a of the lower cover 42L.

The cover base 41 includes: a holding portion 41a that holds the upper cover 42U and the lower cover 42L; and a cover fixing portion 41b that fixes the cover base 41 to the housing 11 of the rotating electric machine 1.

The holding portion 41a of the cover base 41 is provided with a pair of insertion holes 411 and 412 through which the engagement claws 421a and 422a are inserted. Then, the pair of engagement claws 421a, 422a provided on the lower cover 42L are engaged with the pair of engagement holes 421b, 422b provided on the upper cover 42U through the pair of insertion holes 411, 412, whereby the upper cover 42U and the lower cover 42L are held on the cover base 41.

Thus, the cover base 41, the upper cover 42U, and the lower cover 42L are fixed at one location, and therefore the structure can be simplified.

The cover fixing portion 41b of the cover base 41 has an insertion portion 413 protruding toward the housing 11 of the rotating electric machine 1, and two fastening holes 414. Then, the insertion portion 413 is inserted into the housing 11 of the rotating electric machine 1, and the bolts 941 are inserted into the two fastening holes 414, whereby the cover member 40 is attached to the housing 11 of the rotating electric machine 1.

Here, the cover member 40 is configured not to contact the three bus bars 30U, 30V, and 30W in a state of being attached to the housing 11 of the rotating electric machine 1.

Thus, even when the bus bars 30U, 30V, and 30W vibrate, it is possible to prevent the occurrence of abnormal noise caused by the contact of the bus bars 30U, 30V, and 30W with the cover member 40.

The bus bar 30U is movable in a space formed by the upper cover 42U, the lower cover 42L, the end wall portion 420a, and the first partition wall 421. Similarly, the bus bar 30V is movable in a space formed by the upper cover 42U, the lower cover 42L, the first partition wall 421, and the second partition wall 422, and the bus bar 30W is movable in a space formed by the upper cover 42U, the lower cover 42L, the second partition wall 422, and the end wall portion 420 b.

Accordingly, when the first terminal portions 301U, 301V, and 301W are fastened and coupled to the first terminal plate 51 and when the second terminal portions 302U, 302V, and 302W are fastened and coupled to the second terminal plate 52, the three bus bars 30U, 30V, and 30W can move within the cover 42 to some extent, and therefore, even if manufacturing errors occur in the bus bars 30U, 30V, and 30W, the first terminal portions 301U, 301V, and 301W and the second terminal portions 302U, 302V, and 302W can be easily fastened and coupled to the first terminal plate 51 and the second terminal plate 52.

Further, since the engaging claws 421a provided on the first partition wall 421 are disposed between the bus bar 30U and the bus bar 30V and the engaging claws 422a provided on the second partition wall 422 are disposed between the bus bar 30V and the bus bar 30W, the cover base 41 can hold the upper cover 42U and the lower cover 42L in a well-balanced manner and can maintain the non-contact state of the cover member 40 with the three bus bars 30U, 30V, and 30W.

When the rotating electrical machine 1 is mounted in a vehicle, the first terminal portions 301U, 301V, and 301W are disposed on the vehicle front-rear direction center side with respect to the rotating shaft CL of the rotating electrical machine 1. More specifically, the rotating electrical machine 1 is mounted on a vehicle such that the rotating shaft CL of the rotating electrical machine 1 is oriented in the lateral direction of the vehicle, when the rotating electric machine 1 is mounted on the front side of the vehicle, the first terminal portions 301U, 301V, and 301W are arranged on the rear side of the vehicle, that is, the front side of the rotating electric machine 1 becomes the left side of the vehicle, the rear side of the rotating electric machine 1 becomes the right side of the vehicle, the left side of the rotating electric machine 1 becomes the rear side of the vehicle, the right side of the rotating electric machine 1 becomes the front side of the vehicle, when the rotating electric machine 1 is mounted on the rear side of the vehicle, the first terminal portions 301U, 301V, and 301W are arranged on the front side of the vehicle, that is, the front side of the rotating electric machine 1 becomes the right side of the vehicle, the rear side of the rotating electric machine 1 becomes the left side of the vehicle, the left side of the rotating electric machine 1 becomes the front side of the vehicle, and the right side of the rotating electric machine 1 becomes the rear side of the vehicle.

Thus, when the vehicle collides in the front-rear direction, the stator core 121, the coil 122, and the rotor 13 function as a protective wall for the first terminal portions 301U, 301V, and 301W in the collision direction. This protects the first terminal portions 301U, 301V, and 301W.

Here, the rotating electrical machine 1 may be mounted on the vehicle such that the rotating shaft CL of the rotating electrical machine 1 is oriented in the vertical direction of the vehicle. Similarly, in this case, when the rotating electrical machine 1 is mounted in the vehicle, the first terminal portions 301U, 301V, and 301W are disposed on the vehicle front-rear direction center side with respect to the rotating shaft CL of the rotating electrical machine 1.

The above embodiment can be modified and improved as appropriate.

For example, in the present embodiment, the three bus bars 30U, 30V, and 30W are arranged in this order, but may be arranged in any order.

The three bus bars 30U, 30V, and 30W are not limited to the shape of the present embodiment, and may have at least three extending portions extending in three directions perpendicular to each other, and a bent portion connecting the two extending portions.

In the present embodiment, the cover member 40 is disposed above the stator 12, but may be disposed at any position that can collectively cover the three bus bars 30U, 30V, and 30W.

In the present specification, at least the following matters are described. Although the corresponding components and the like in the above-described embodiment are shown in parentheses, the present invention is not limited to these.

(1) A stator (stator 12) of a rotating electrical machine (rotating electrical machine 1) is provided with:

a stator core (stator core 121);

a coil (coil 122) attached to the stator core;

a plurality of bus bars (bus bars 30U, 30V, 30W) each having a first terminal portion (first terminal portions 301U, 301V, 301W) provided at one end portion and electrically connected to a terminal portion of each phase of the coil, and a second terminal portion (second terminal portions 302U, 302V, 302W) provided at the other end portion and electrically connected to a terminal portion of a power conversion device corresponding to each phase of the coil,

when viewed from the direction of the rotation axis (rotation axis CL) of the rotating electric machine,

the first terminal portions of the plurality of bus bars are arranged substantially vertically outside the stator core in the radial direction,

the second terminal portions of the plurality of bus bars are arranged substantially horizontally above the stator core.

Among the first terminal portions of the plurality of bus bars, the first terminal portion (first terminal portion 301U) disposed uppermost is disposed so as to be located below an uppermost portion (uppermost portion 121T) of the stator core.

According to (1), when viewed from the direction of the rotation axis of the rotating electrical machine, the first terminal portions of the plurality of bus bars are arranged substantially vertically outside the stator core in the radial direction, the second terminal portions of the plurality of bus bars are arranged substantially horizontally above the stator core, and the first terminal portion arranged uppermost among the first terminal portions of the plurality of bus bars is arranged below the uppermost portion of the stator core.

(2) The stator of a rotating electric machine according to (1), wherein,

the first terminal portion disposed at the lowermost position among the first terminal portions of the plurality of bus bars is disposed so as to be located above the rotation shaft.

According to (2), since the first terminal portion disposed at the lowermost position among the first terminal portions of the plurality of bus bars is disposed so as to be located above the rotation shaft, the height above the stator of the rotating electrical machine can be reduced, and the length of the bus bar can be suppressed.

(3) The stator of a rotating electric machine according to (1) or (2), wherein,

at least a part of the first terminal portions of the plurality of bus bars is located on the center side of the outermost end portion (left-side outermost end portion 121L) of the stator core in the horizontal direction.

According to (3), since at least a part of the first terminal portions of the plurality of bus bars is positioned on the center side with respect to the outermost end portion of the stator core in the horizontal direction, the horizontal length of the stator of the rotating electric machine can be reduced.

(4) The stator of a rotating electric machine according to any one of (1) to (3),

the bus bar has first extension portions ( first extension portions 311U, 311V, 311W), second extension portions ( second extension portions 312U, 312V, 312W), and third extension portions ( third extension portions 313U, 313V, 313W) extending in three directions perpendicular to each other.

According to (4), since the bus bar has the first extending portion, the second extending portion, and the third extending portion extending in 3 directions perpendicular to each other, even if there is a manufacturing error in the bus bar when the first terminal portion and the second terminal portion are electrically connected to the terminal portions of the respective phases of the coil and the terminal portion of the power conversion device, stress can be dispersed in three directions perpendicular to each other by the first extending portion to the third extending portion. This can reduce the sectional area of the bus bar, and can reduce the cost of the bus bar.

(5) The stator of a rotating electric machine according to (4), wherein,

the first extension extends in the direction of the rotation axis,

the second extension portion extends in the vertical direction when viewed from the rotation axis direction,

the third extending portion extends in a horizontal direction when viewed from the rotation axis direction.

According to (5), since the first to third extending portions extend in three directions perpendicular to each other, i.e., the rotation axis direction, the vertical direction when viewed from the rotation axis direction, and the horizontal direction when viewed from the rotation axis direction, stress can be dispersed in the three directions perpendicular to each other by the first to third extending portions, and an arrangement with excellent space efficiency can be provided.

(6) The stator of a rotating electric machine according to (5), wherein,

the third extending portion extends in a horizontal direction when viewed from the rotation axis direction above the stator core, and the third extending portions of the plurality of bus bars are arranged at the same height.

According to (6), since the third extending portion extends above the stator core and the third extending portions of the plurality of bus bars are arranged at the same height, the height above the stator of the rotating electric machine can be reduced.

(7) The stator of a rotating electric machine according to any one of (1) to (6),

the stator of the rotating electric machine further includes a cover member (cover member 40) that collectively covers the plurality of bus bars.

According to (7), since the stator of the rotating electric machine includes the cover member that collectively covers the plurality of bus bars, the plurality of bus bars can be unitized by the cover member, and the plurality of bus bars can be handled integrally at the time of assembly.

(8) The stator of a rotating electric machine according to (7), wherein,

each of the bus bars has a bent portion (third bent portions 323U, 323V, 323W),

the cover member includes a cover portion (cover portion 42) covering at least the periphery of the bent portion, and a cover fixing portion (cover fixing portion 41b) for mounting the cover portion to the support member (housing 11),

the cover member is configured not to contact the plurality of bus bars in a state where the cover fixing portion is attached to the support member.

(8) According to (8), since the cover portion covers at least the periphery of the bent portion, the plurality of bus bars can move to some extent in the cover portion during the terminal connection work, and the first terminal portion and the second terminal portion of each bus bar can be easily connected even if there is a manufacturing error in each bus bar.

Further, since the cover member is configured not to contact the plurality of bus bars in a state where the cover fixing portion is attached to the support member, it is possible to prevent generation of abnormal noise due to vibration.

(9) The stator of a rotating electric machine according to any one of (1) to (8),

the rotating electric machine is mounted on a vehicle,

the first terminal portion is disposed on a front-rear direction center side of the vehicle with respect to the rotation shaft of the rotating electric machine.

According to (9), since the first terminal portion is disposed on the vehicle front-rear direction center side with respect to the rotation shaft of the rotating electric machine, the first terminal portion can be protected against an impact in the vehicle front-rear direction.