WO2013157083A1

WO2013157083A1 - Rotating electrical machine

Info

Publication number: WO2013157083A1
Application number: PCT/JP2012/060371
Authority: WO
Inventors: 宗司村上
Original assignee: 株式会社安川電機
Priority date: 2012-04-17
Filing date: 2012-04-17
Publication date: 2013-10-24

Abstract

This rotating electrical machine is provided with: tooth sections (13); a plurality of yoke sections (11) divided in the axial direction and upon which the tooth sections (13) are mounted, said yoke sections comprising steel plates layered in the radial direction; and insulation members (12) that insulate the plurality of yoke sections from each other.

Description

Rotating electric machine

The present invention relates to a rotating electrical machine, and more particularly, to a rotating electrical machine having a yoke portion made of steel plates laminated in a radial direction.

Conventionally, a rotating electrical machine having a yoke portion made of steel plates laminated in a radial direction is known. Such a rotating electrical machine is disclosed in, for example, Japanese Patent Application Laid-Open No. 2006-197779.

In the rotating electrical machine disclosed in the above Japanese Patent Application Laid-Open No. 2006-197779, an annular yoke portion is formed by laminating steel plates in the radial direction. A plurality of teeth portions are attached to the inner peripheral side of the yoke portion at substantially equal intervals along the circumferential direction so as to come into contact with the steel plate constituting the yoke portion.

JP 2006-197779 A

However, in the rotating electrical machine described in Japanese Patent Application Laid-Open No. 2006-197779, the steel plate of the yoke portion is one or a plurality of plates that are continuous in the circumferential direction on the outer side in the radial direction, and therefore passes through the yoke portion in the radial direction. The eddy current generated due to the magnetic flux (passing perpendicularly to the surface of the steel plate of the yoke part) and flowing in the direction perpendicular to the magnetic flux flows in the plane of the steel plate of the yoke part located radially outside There is a problem.

The present invention has been made to solve the above-described problems, and one object of the present invention is that eddy current flows even when a yoke portion made of steel plates stacked in the radial direction is used. It is providing the rotary electric machine which can suppress this.

The rotating electrical machine according to one aspect is composed of a tooth portion, a steel plate to which the tooth portion is attached and laminated in the radial direction, and insulation between the plurality of yoke portions divided in the axial direction and the plurality of yoke portions. A member.

In the rotating electrical machine according to one aspect, as described above, by providing the insulating member for insulating between the plurality of yoke portions, the plurality of yoke portions divided in the axial direction are insulated by the insulating member. It is possible to suppress the eddy current caused by the magnetic flux passing through the yoke portion in the radial direction from flowing to the steel plate of the yoke portion.

According to the rotating electric machine, it is possible to suppress the flow of eddy currents even when a yoke portion made of steel plates stacked in the radial direction is used.

It is a perspective view of the stator of the rotary electric machine by 1st Embodiment. It is a disassembled perspective view of the stator of the rotary electric machine shown in FIG. It is a perspective view of the teeth part of the rotary electric machine by 1st Embodiment. It is an enlarged view of the teeth part of the rotary electric machine by 1st Embodiment. It is sectional drawing of the rotary electric machine by 1st Embodiment. It is a perspective view of the long plate-shaped steel plate which forms the yoke part of the rotary electric machine by 1st Embodiment. It is a figure which shows the state which provided the notch part in the long plate-shaped steel plate shown in FIG. It is a figure which shows the state which wound the long plate-shaped steel plate shown in FIG. It is a figure which shows the state by which the coil was wound by the teeth part of the rotary electric machine by 1st Embodiment. It is a figure which shows the state which has assembled the stator of the rotary electric machine by 1st Embodiment. It is a disassembled perspective view of the stator of the rotary electric machine by 2nd Embodiment. It is a perspective view of the teeth part of the rotary electric machine by 2nd Embodiment. It is a figure which shows the state which the yoke part and teeth part of the rotary electric machine by 2nd Embodiment are contact | abutting. It is a disassembled perspective view of the stator of the rotary electric machine by 3rd Embodiment. It is a perspective view of the teeth part of the rotary electric machine by 3rd Embodiment. It is a figure which shows the state which the yoke part and teeth part of the rotary electric machine by 3rd Embodiment are contact | abutting. It is a perspective view of the stator of the rotary electric machine by 4th Embodiment. It is a disassembled perspective view of the stator of the rotary electric machine shown in FIG. FIG. 6 is a perspective view of a stator of a rotating electrical machine according to a first modification of the first to fourth embodiments. FIG. 10 is a perspective view of a yoke portion of a rotating electrical machine according to a second modification of the first to fourth embodiments.

Hereinafter, embodiments will be described with reference to the drawings.

(First embodiment)
First, the configuration of the rotating electrical machine 100 according to the first embodiment will be described with reference to FIGS.

As shown in FIGS. 1 to 5, the rotating electrical machine 100 includes a stator 1 and a rotor 2 (see FIG. 5). As shown in FIG. 5, the stator 1 and the rotor 2 are arranged so as to face each other in the radial direction.

As shown in FIGS. 1 and 2, the stator 1 includes a yoke portion 11, a resin sheet 12, a teeth portion 13, and a coil 14. The resin sheet 12 is an example of an “insulating member”. Here, in the first embodiment, the yoke portion 11 includes an upper yoke portion 15 and a lower yoke portion 16 that are divided in the axial direction (Z direction). The upper yoke portion 15 and the lower yoke portion 16 are made of steel plates stacked in the radial direction. Further, the upper yoke portion 15 and the lower yoke portion 16 are long plate-like steel plates 31 in which portions (notch portions 15b and notch portions 16b described later) to which the tooth portions 13 are attached are notched in advance (see FIG. 8). Is formed so that the steel plates are laminated in the radial direction. The upper yoke portion 15 is an example of a “first yoke portion”. The lower yoke portion 16 is an example of a “second yoke portion”.

In the first embodiment, a sheet-like resin sheet 12 is provided between the upper yoke portion 15 and the lower yoke portion 16. The yoke portion 11 (upper yoke portion 15 and lower yoke portion 16) is formed in an annular shape, and the resin sheet 12 is formed in an annular yoke portion 11 (upper yoke portion 15 and Arranged in a circular arc shape between the lower yoke portions 16). The resin sheet 12 is made of, for example, an epoxy resin, a polyimide resin, a polyamide resin, a polyethylene resin, a PPS (polyphenylene sulfide) resin, or the like. The resin sheet 12 has a thickness t (see FIG. 4) of about 0.1 mm.

In the first embodiment, the resin sheet 12 is a portion where the upper yoke portion 15 and the lower yoke portion 16 are opposed to each other except for the tooth portion 13 (the tooth portion 13 is pivoted to the upper yoke portion 15 and the lower yoke portion 16. The upper yoke portion 15 and the lower yoke portion 16 are disposed so as to be opposed to each other other than the portion in contact with the direction. Specifically, the resin sheet 12 is provided so as to cover substantially the entire surface 15a (see FIG. 2) on the arrow Z2 direction side other than a portion where a later-described cutout portion 15b of the upper yoke portion 15 is formed. Yes. Similarly, the resin sheet 12 is provided so as to cover substantially the entire surface 16a (see FIG. 2) on the arrow Z1 direction side other than a portion where a later-described cutout portion 16b of the lower yoke portion 16 is formed. .

In the first embodiment, as shown in FIG. 4, the resin sheet 12 divides the axial path among the eddy current paths A flowing so as to surround the teeth portion 13 generated by the magnetic flux generated in the radial direction. Thus, it arrange | positions in the part of the yoke part 11 corresponding to the side surface 13a extended in the axial direction and radial direction of the teeth part 13. FIG. Specifically, the resin sheet 12 is provided in a portion of the yoke portion 11 corresponding to the central portion of the side surface 13 a of the tooth portion 13. Further, a plurality of teeth portions 13 are provided at substantially equal intervals along the circumferential direction (12 in the first embodiment, see FIG. 3), and the resin sheet 12 is between the side surfaces 13 a of the adjacent teeth portions 13. It is arrange | positioned so that it may extend in the circumferential direction.

Further, in the first embodiment, as shown in FIG. 2, the upper yoke portion 15 is provided with a notch portion 15b into which the tooth portion 13 is fitted in the axial direction. A plurality of cutout portions 15b are provided along the circumferential direction of the annular upper yoke portion 15 (12 in the first embodiment at equal intervals of 30 degrees). The notch 15b is notched so as to open toward the arrow Z2 direction, and has a substantially rectangular shape when viewed from the radial direction. Moreover, the yoke side contact part 15c which contact | abuts with the teeth part 13 of the notch part 15b at an axial direction is formed in flat surface shape so that the surface (horizontal surface) orthogonal to a Z direction may be followed. Moreover, the teeth side contact part 13b which contact | abuts the notch part 15b of the teeth part 13 in an axial direction is a flat surface so that the surface (horizontal surface) orthogonal to a Z direction may be contacted to the yoke side contact part 15c. It is formed in a shape. The notch 15b is an example of a “first notch”.

Further, the lower yoke portion 16 is provided with a notch portion 16b into which the tooth portion 13 is fitted in the axial direction. A plurality of cutout portions 16b are provided along the annular lower yoke portion 16 (in the first embodiment, twelve at equal intervals of 30 degrees). The notch 16b is notched so as to open toward the arrow Z1 direction, and has a substantially rectangular shape when viewed from the radial direction. Moreover, the yoke side contact part 16c which contact | abuts the teeth part 13 of the notch part 16b to an axial direction is formed in flat surface shape so that the surface (horizontal surface) orthogonal to a Z direction may be followed. Moreover, the teeth side contact part 13c which contact | abuts the notch part 16b of the teeth part 13 in an axial direction is a flat surface so that the surface (horizontal surface) orthogonal to a Z direction may be contacted to the yoke side contact part 16c. It is formed in a shape. A plurality of teeth portions 13 (12 in the first embodiment) are provided, and the plurality of teeth portions 13 include a plurality of notches 15b of the upper yoke portion 15 and a plurality of notches of the lower yoke portion 16. It is inserted | pinched by the axial direction by the part 16b. The notch 16b is an example of a “second notch”.

Further, in the first embodiment, as shown in FIG. 2, the axial side (the arrow Z1 direction side) of the cutout portion 15b of the upper yoke portion 15 extends from the axial surface of the teeth portion 13 to the axial direction side (arrow). A projecting portion 15d projecting in the Z1 direction side) is provided. The protruding portion 15d of the upper yoke portion 15 is configured to hold the teeth side abutting portion 13b of the teeth portion 13 on the arrow Z1 direction side. Further, on the axial direction side (arrow Z2 direction side) of the notch portion 16b of the lower yoke portion 16, a protruding portion 16d that protrudes from the surface in the axial direction of the tooth portion 13 to the axial direction side (arrow Z2 direction side) is provided. It has been. The protruding portion 16d of the lower yoke portion 16 is configured to hold the teeth side contact portion 13c on the arrow Z2 direction side.

In the first embodiment, the cutout portion 15b of the upper yoke portion 15 penetrates the upper yoke portion 15 in the radial direction. Further, the notch 16b of the lower yoke portion 16 also penetrates the lower yoke portion 16 in the radial direction. And the teeth part 13 penetrates the notch part 15b and the notch part 16b, and is attached to the yoke part 11 (the upper yoke part 15, the lower yoke part 16). Further, as shown in FIG. 1, the outer peripheral surface 13 d of the tooth portion 13 fitted into the notch portion 15 b of the upper yoke portion 15 and the notch portion 16 b of the lower yoke portion 16 is the outer periphery of the yoke portion 11. It is configured to be substantially flush with the side surface 11a. Moreover, the part (tooth side contact part 13b, teeth side contact part 13c, see FIG. 3) fitted to the yoke part 11 of the teeth part 13 has a substantially rectangular shape when viewed from the axial direction.

Further, as shown in FIG. 5, the rotor 2 includes a shaft 21, a rotor core 22, and a magnet 23. The rotor core 22 is attached to the shaft 21. The magnet 23 is attached to the rotor core 22.

Next, a method for manufacturing the stator 1 of the rotating electrical machine 100 will be described with reference to FIGS. 4 and 6 to 10.

First, as shown in FIG. 6, a plurality of notches 31a are formed in the long steel plate 31 along the direction in which the steel plate 31 extends, as shown in FIG. The notch 31a is formed at a position corresponding to the notch 15b of the upper yoke 15 (the notch 16b of the lower yoke 16). Next, as shown in FIG. 8, the steel plate 31 in which the notch 31a is formed is wound. Thereby, the upper yoke part 15 and the lower yoke part 16 are formed, respectively. The upper yoke portion 15 and the lower yoke portion 16 have the same shape. That is, the upper yoke portion 15 and the lower yoke portion 16 are formed by the same steel plate 31. In addition, the steel plate 31 is laminated | stacked 10 layers, for example in a radial direction.

Next, as shown in FIG. 9, the coil 14 is wound around the tooth portion 13. Then, as shown in FIG. 10, in the state where the resin sheet 12 is disposed so as to be interposed between the upper yoke portion 15 and the lower yoke portion 16, the teeth portion 13 includes a plurality of notches in the upper yoke portion 15. The portion 15b and the plurality of cutout portions 16b of the lower yoke portion 16 are sandwiched in the axial direction. For example, the tooth part 13 is fixed by being press-fitted into the notch part 15b and the notch part 16b. Accordingly, as shown in FIG. 4, the tooth portion 13 is attached to the yoke portion 11 in a state where the upper yoke portion 15 and the lower yoke portion 16 are insulated by the resin sheet 12. Thus, the stator 1 is completed.

Next, the eddy current generated in the yoke portion 11 will be described with reference to FIG.

Due to the magnetic flux A passing through the yoke portion 11 in the radial direction, an eddy current tends to flow through the steel plate of the yoke portion 11 so as to surround the tooth portion 13 as shown by a path A in FIG. On the other hand, since the resin sheet 12 is provided between the upper yoke portion 15 and the lower yoke portion 16, the resin sheet 12 prevents eddy current from flowing through the steel plate of the yoke portion 11. Further, due to the magnetic flux B passing through the upper surface 11b of the yoke portion 11 in the Z direction, as shown in the path B, an eddy current tends to flow in the horizontal plane of the yoke portion 11 (steel plate). The steel plate constituting the yoke portion 11 has a surface covered with an insulating film (not shown), and when the steel plates are laminated in the radial direction as in the first embodiment, eddy currents pass through the path B. The flowing is suppressed by the insulating film of the steel plate. Thus, since the eddy current is suppressed from flowing through the yoke portion 11, the iron loss of the yoke portion 11 is reduced. As a result, since the total loss of the rotating electrical machine 100 is reduced, the rotating electrical machine 100 can be reduced in size, increased in efficiency, and increased in output. That is, the rotating electrical machine 100 according to the first embodiment can reduce the volume of the stator 1 necessary for generating a predetermined torque and output as compared with the conventional rotating electrical machine that cannot suppress the flow of eddy current. Become. In addition, when the volume of the rotating electrical machine 100 of the first embodiment is set to the same volume as that of a conventional rotating electrical machine that cannot suppress the flow of eddy current, it is possible to increase the torque and output that can be generated.

In the first embodiment, as described above, by providing the resin sheet 12 that insulates between the plurality of yoke portions 11 (the upper yoke portion 15 and the lower yoke portion 16) divided in the axial direction, the plurality of yokes is provided. Since the portion 11 is insulated by the resin sheet 12, it is possible to suppress the eddy current caused by the magnetic flux passing through the yoke portion 11 in the radial direction from flowing to the steel plate of the yoke portion 11.

In the first embodiment, the sheet-shaped resin sheet 12 is used as described above. Thereby, the resin sheet 12 can be easily disposed between the upper yoke portion 15 and the lower yoke portion 16.

Further, in the first embodiment, as described above, the resin sheet 12 is disposed so as to be interposed in a portion where the upper yoke portion 15 and the lower yoke portion 16 are opposed to each other except the teeth portion 13. Accordingly, the resin sheet 12 can be disposed between the upper yoke portion 15 and the lower yoke portion 16 in a state where the upper yoke portion 15 and the lower yoke portion 16 are in contact with the teeth portion 13.

In the first embodiment, as described above, the resin sheet 12 is disposed on the portion of the yoke portion 11 corresponding to the side surface 13a extending in the axial direction and the radial direction of the tooth portion 13. Thereby, since the path A of the eddy current flowing so as to surround the tooth portion 13 is divided, it is possible to reliably suppress the eddy current from flowing to the steel plate of the yoke portion 11.

In the first embodiment, as described above, a plurality of the teeth portions 13 are provided at substantially equal intervals along the circumferential direction, and the resin sheet 12 extends in the circumferential direction between the side surfaces 13a of the adjacent tooth portions 13. Arrange so that. Thereby, since the resin sheet 12 is disposed so as to extend in the circumferential direction between the adjacent tooth portions 13, it is ensured that an eddy current flows through the steel plate of the corresponding yoke portion 11 between the adjacent tooth portions 13. Can be suppressed.

In the first embodiment, as described above, the resin sheet 12 is formed in an arc shape between a plurality of annular yoke portions 11 (the upper yoke portion 15 and the lower yoke portion 16) divided in the axial direction. Deploy. Thereby, since the resin sheet 12 can be arrange | positioned along the surface of the some annular | circular shaped yoke part 11, between the upper yoke part 15 and the lower yoke part 16 can be insulated reliably.

In the first embodiment, as described above, the yoke portion 11 is divided into two in the axial direction, and the resin sheet 12 is disposed between the upper yoke portion 15 and the lower yoke portion 16. Thereby, the resin sheet 12 can be easily disposed on the yoke portion 11.

Further, in the first embodiment, as described above, the notch portion 15b in which the tooth portion 13 is fitted in the axial direction to the yoke portion 11 (the upper yoke portion 15 and the lower yoke portion 16) divided in the axial direction. And the notch part 16b is provided. Then, the tooth portion 13 is attached to the yoke portion 11 by being fitted into the notch portion 15b and the notch portion 16b of the yoke portion 11 and sandwiched in the axial direction. Thereby, the teeth part 13 can be attached to the yoke part 11 easily.

Further, in the first embodiment, as described above, the protruding portion 15d protruding from the axial surface of the tooth portion 13 toward the axial direction on the axial direction side of the notched portion 15b and the notched portion 16b of the yoke portion 11 and the protruding portion A portion 16d is provided. As a result, the axial length of the yoke portion 11 is larger than the axial length of the teeth portion 13, so that the torque required for the rotating electrical machine 100 and the circumferential cross-sectional area of the yoke portion 11 required for output (the teeth). The space around which the coil 14 is wound can be increased while ensuring that the area of the surface 13d on the outer peripheral side of the portion 13 is equal to about one half of the area. As a result, since the diameter of the electric wire constituting the coil 14 can be increased, the copper loss of the coil 14 and the total loss of the rotating electrical machine 100 can be reduced, and the rotating electrical machine 100 can be reduced in size and increased in efficiency. And it becomes possible to achieve high output.

In the first embodiment, as described above, a plurality of notches 15 b are provided along the circumferential direction of the annular upper yoke portion 15, and the notches 16 b are disposed in the circumferential direction of the annular lower yoke portion 16. A plurality are provided along. Then, the plurality of teeth 13 are sandwiched in the axial direction by the plurality of notches 15 b of the upper yoke portion 15 and the plurality of notches 16 b of the lower yoke portion 16. Thereby, the several teeth part 13 can be attached to the yoke part 11 easily.

Further, in the first embodiment, as described above, the

notches

15b and 16b of the yoke portion 11 are formed so as to penetrate the yoke portion 11 in the radial direction, and the teeth portion 13 is formed as the

notches

15b and 16b. It attaches to the yoke part 11 so that it may penetrate. Thereby, the teeth part 13 can be firmly attached to the yoke part 11.

Further, in the first embodiment, as described above, the outer peripheral surface 13d of the tooth portion 13 fitted to the

notches

15b and 16b of the yoke portion 11 is substantially the same as the outer peripheral surface 11a of the yoke portion 11. Configure to be one. Thereby, unlike the case where the teeth part 13 protrudes from the outer peripheral side of the yoke part 11, the diameter of the rotary electric machine 100 can be made small.

Also, in the first embodiment, as described above, the portion fitted to the yoke portion 11 of the teeth portion 13 is configured to have a substantially rectangular shape when viewed from the axial direction. Thereby, unlike the case where the portion fitted to the yoke portion 11 of the tooth portion 13 is formed in a tapered shape when viewed from the axial direction, the contact area between the side surface 13a in the axial direction of the tooth portion 13 and the yoke portion 11 is different. Therefore, the eddy current flowing through the yoke portion 11 can be reduced.

Moreover, in 1st Embodiment, as mentioned above, the steel plate is made to radial direction by winding the elongate plate-shaped steel plate 31 by which the part to which the teeth part 13 is attached is notched beforehand as mentioned above. It is formed so as to be laminated. Thereby, the yoke part 11 which consists of a steel plate laminated | stacked on a radial direction can be formed easily.

(Second Embodiment)
Next, the configuration of the rotating electrical machine 101 according to the second embodiment will be described with reference to FIGS. In the second embodiment, unlike the first embodiment in which the yoke side contact portion of the notch portion and the teeth side contact portion of the tooth portion are formed in a flat surface shape, the yoke side contact portion of the notch portion and The teeth side contact portion of the teeth portion is chamfered.

11 and 12, the stator 40 of the rotating electrical machine 101 according to the second embodiment includes a yoke part 41, a resin sheet 42, a tooth part 43, and a coil 44. Further, the yoke part 41 includes an annular upper yoke part 45 and a lower yoke part 46 which are divided in the axial direction (Z direction). The resin sheet 42 is an example of an “insulating member”. The upper yoke portion 45 is an example of a “first yoke portion”. The lower yoke portion 46 is an example of a “second yoke portion”.

Here, in the second embodiment, the teeth 43 of the notch 45a of the upper yoke 45 and the yoke-side abutting portion 45b (see FIG. 13) that abuts in the axial direction (Z direction) are chamfered. Further, the tooth side contact portion 43a that is in axial contact with the cutout portion 45a of the upper yoke portion 45 of the tooth portion 43 is chamfered so as to be in surface contact with the yoke side contact portion 45b. The chamfering angle θ1 (see FIG. 13) of the yoke-side contact portion 45b of the upper yoke portion 45 and the chamfering angle θ2 (see FIG. 13) of the teeth-side contact portion 43a of the tooth portion 43 are approximately 45. Degree.

In the second embodiment, the tooth-side contact portion 46b that contacts the tooth portion 43 of the cut-out portion 46a of the lower yoke portion 46 in the axial direction (Z direction) is chamfered. Further, the tooth side contact portion 43b that is in axial contact with the notch portion 46a of the lower yoke portion 46 of the tooth portion 43 is chamfered so as to be in surface contact with the yoke side contact portion 46b. The chamfering angle θ3 (see FIG. 13) of the yoke-side contact portion 46b of the lower yoke portion 46 and the chamfering angle θ4 (see FIG. 13) of the tooth-side contact portion 43b of the tooth portion 43 are substantially the same. 45 degrees. The notch 45a is an example of a “first notch”. The notch 46a is an example of a “second notch”. In addition, the other structure of 2nd Embodiment is the same as that of the said 1st Embodiment.

Next, the eddy current generated in the yoke portion 41 will be described with reference to FIG.

As shown in FIG. 13, the eddy current caused by the magnetic flux C flowing through the path passing the yoke part 41 side (arrow Z1 direction side) after passing through the tooth part 43 in the radial direction constitutes the tooth part 43. The sheet flows through a portion (range C1 in FIG. 13) where the sheet of steel and the sheet of steel constituting the yoke portion 41 are in contact. On the other hand, in the case where the tooth portion and the yoke portion are not chamfered (see the dotted line in FIG. 13), the eddy current is a portion where the uppermost steel sheet constituting the tooth portion contacts the yoke portion (range C2 in FIG. 13). Flowing above). Therefore, by chamfering the teeth part 43 and the yoke part 41, the range (area) in which the eddy current flows can be reduced, so that the eddy current can be reduced.

In the second embodiment, as described above, the yoke side abutting portion 45b (yoke side abutting portion 46b) that abuts the teeth 43 of the notched portion 45a (notched portion 46a) of the yoke portion 41 in the axial direction is chamfered. To do. Further, the tooth side contact portion 43a (tooth side contact portion 43b) that contacts the notch portion 45a (notch portion 46a) of the yoke portion 41 of the tooth portion 43 in the axial direction is replaced with the yoke side contact portion 45b (yoke side contact portion). Chamfer so that it comes into surface contact with contact 46b). Thereby, since the range which the yoke part 41 and the teeth part 43 into which an eddy current flows can be made small, an eddy current can be reduced.

In the second embodiment, as described above, the chamfering angle θ1 (θ3) of the yoke-side contact portion 45b (yoke-side contact portion 46b) of the yoke portion 41 and the teeth-side contact of the teeth portion 43 are also provided. The chamfering angle θ2 (θ4) of the portion 43a (tooth side contact portion 43b) is set to approximately 45 degrees. Thereby, compared with the case where the chamfering angle is relatively larger (smaller) than about 45 degrees, the range in which the yoke portion 41 and the tooth portion 43 through which the eddy current flows can be reduced. It can be further reduced. The remaining effects of the second embodiment are similar to those of the aforementioned first embodiment.

(Third embodiment)
Next, the configuration of the rotating electrical machine 102 according to the third embodiment will be described with reference to FIGS. In the third embodiment, unlike the first embodiment in which the yoke-side contact portion of the notch portion and the teeth-side contact portion of the tooth portion are formed in a flat surface shape, the yoke-side contact portion of the notch portion and The teeth side contact portion of the teeth portion is formed in a step shape.

As shown in FIGS. 14 and 15, the stator 50 of the rotating electrical machine 102 according to the third embodiment includes a yoke part 51, a resin sheet 52, a tooth part 53, and a coil 54. The yoke portion 51 includes an annular upper yoke portion 55 and a lower yoke portion 56 that are divided in the axial direction (Z direction). The resin sheet 52 is an example of an “insulating member”. The upper yoke portion 55 is an example of a “first yoke portion”. The lower yoke portion 56 is an example of a “second yoke portion”.

Here, in the third embodiment, the teeth 53 of the notch 55a of the upper yoke 55 and the yoke contact 55b (see FIG. 16) that contacts in the axial direction (Z direction) are formed in a step shape. Yes. Further, the teeth side contact portion 53a that is in axial contact with the notch portion 55a of the upper yoke portion 55 of the tooth portion 53 is formed in a stepped shape so as to mesh with the yoke side contact portion 55b. Then, the inclination angle θ5 (see FIG. 16) when the step of the yoke-side contact portion 55b of the upper yoke portion 55 is regarded as a slope, and the step of the teeth-side contact portion 53a of the teeth portion 53 are regarded as a slope. In this case, the inclination angle θ6 (see FIG. 16) is approximately 45 degrees.

In the third embodiment, the teeth 53 of the notch 56a of the lower yoke 56 and the yoke contact 56b that contacts in the axial direction (Z direction) are formed stepwise. Further, the teeth side contact portion 53b that contacts the notch portion 56a of the lower yoke portion 56 of the tooth portion 53 in the axial direction is formed in a stepped shape so as to mesh with the yoke side contact portion 56b. Then, the inclination angle θ7 (see FIG. 16) when the step of the yoke-side contact portion 56b of the lower yoke portion 56 is regarded as a slope, and the step of the teeth-side contact portion 53b of the teeth portion 53 are regarded as a slope. In this case, the inclination angle θ8 (see FIG. 16) is approximately 45 degrees. The notch 55a is an example of a “first notch”. The notch 56a is an example of a “second notch”. The remaining configuration of the third embodiment is similar to that of the aforementioned first embodiment.

Next, the eddy current generated in the yoke portion 51 will be described with reference to FIG.

As shown in FIG. 16, the eddy current caused by the magnetic flux D flowing through the path passing through the yoke part 51 side (arrow Z1 direction side) after passing through the tooth part 53 in the radial direction constitutes the tooth part 53. The sheet flows through a portion (range D1 in FIG. 16) where the steel sheet and one steel sheet constituting the yoke portion 51 come into contact with each other. Thereby, unlike the case where the tooth portion and the yoke portion are not formed stepwise (see the dotted line in FIG. 13), the range (area) through which the eddy current flows is reduced, and thus the eddy current can be reduced.

In the third embodiment, as described above, the yoke-side contact portion 55b (yoke-side contact portion 56b) that is in axial contact with the tooth portion 53 of the notch 55a (notch portion 56a) of the yoke portion 51 is used as a staircase. To form. Further, the tooth side contact portion 53a (tooth side contact portion 53b) that contacts the notch portion 55a (notch portion 56a) of the yoke portion 51 of the tooth portion 53 in the axial direction is replaced with the yoke side contact portion 55b (yoke side contact portion). A stepped shape is formed so as to mesh with the contact portion 56b). Thereby, since the range which the yoke part 51 and the teeth part 53 into which an eddy current flows can be made small, an eddy current can be reduced.

In the third embodiment, as described above, the inclination angle θ5 (θ7) when the step of the stepped yoke side contact portion 55b (yoke side contact portion 56b) of the yoke portion 51 is regarded as a slope, In addition, the inclination angle θ6 (θ8) when the step of the stepped teeth side contact portion 53a (tooth side contact portion 53b) of the tooth portion 53 is regarded as a slope is set to about 45 degrees. Thereby, compared with the case where the inclination angle is relatively larger (smaller) than about 45 degrees, the portion where the yoke portion 51 and the tooth portion 53 through which the eddy current flows can be reduced, so that the eddy current can be further reduced. Can be reduced. The remaining effects of the third embodiment are similar to those of the aforementioned first embodiment.

(Fourth embodiment)
Next, the configuration of the rotating electrical machine 103 according to the fourth embodiment will be described with reference to FIGS. 17 and 18. In the fourth embodiment, unlike the first embodiment in which the yoke portion is divided into two in the axial direction, the yoke portion is divided into three in the axial direction.

As shown in FIGS. 17 and 18, in the rotating electrical machine 103 (stator 60) according to the fourth embodiment, the yoke portion 61 is divided into three in the axial direction (Z-axis direction), the upper yoke portion 62, and the lower side A yoke part 63 and a central yoke part 64 located between the upper yoke part 62 and the lower yoke part 63 are included. A resin sheet 65 is provided between the upper yoke portion 62 and the central yoke portion 64, and a resin sheet 66 is provided between the central yoke portion 64 and the lower yoke portion 63. The upper yoke portion 62, the lower yoke portion 63, and the central yoke portion 64 are each composed of a steel plate that is laminated in the radial direction. Further, the upper yoke portion 62 and the lower yoke portion 63 are integrally formed. Further, a plurality of (in the fourth embodiment, twelve) central yoke portions 64 are arranged between adjacent tooth portions 13, and the plurality of central yoke portions 64 are individually divided. The teeth portion 13 is sandwiched between the upper yoke portion 62 and the lower yoke portion 63 in the axial direction, and is sandwiched between the central yoke portion 64 in the circumferential direction. The

resin sheets

65 and 66 are examples of “insulating members”. The upper yoke portion 62 is an example of a “first yoke portion”. The lower yoke portion 63 is an example of a “second yoke portion”. The central yoke portion 64 is an example of a “third yoke portion”. In addition, the other structure of 4th Embodiment is the same as that of the said 1st Embodiment.

In the fourth embodiment, as described above, the yoke portion 61 is divided into three in the axial direction, and the upper yoke portion 62, the lower yoke portion 63, and the upper yoke portion 62 and the lower yoke portion 63 are interposed. And the central yoke portion 64 located at the center. A resin sheet 65 is provided between the upper yoke portion 62 and the central yoke portion 64, and a resin sheet 66 is provided between the central yoke portion 64 and the lower yoke portion 63. Thereby, since the yoke part 61 is insulated by the two resin sheets 65 and the resin sheet 66, it can suppress more that an eddy current flows into the steel plate of the yoke part 61. FIG. The remaining effects of the fourth embodiment are similar to those of the aforementioned first embodiment.

In addition, it should be thought that embodiment disclosed this time is an illustration and restrictive at no points. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and further includes all modifications within the meaning and scope equivalent to the scope of claims for patent.

For example, in the first to fourth embodiments, an example in which a sheet-like resin sheet is arranged in the yoke portion has been described. However, for example, a resin material or the like may be applied to the yoke portion.

In the first to fourth embodiments, the example in which the resin sheet is disposed on the yoke portion corresponding to the side surface of the tooth portion has been described. For example, as in the first modification shown in FIG. The resin sheet 70 may be arranged so as to extend in the axial direction from the surface in the axial direction of the tooth portion on the protruding portion protruding from the surface in the axial direction of the portion.

Further, in the first to fourth embodiments, the resin sheet is arranged so as to extend in the circumferential direction over the entire side surface between the adjacent teeth portions (that is, the resin is extended from one of the adjacent teeth portions to the other). Although an example in which a sheet is disposed is shown, for example, a resin sheet may be partially disposed between the side surfaces of adjacent teeth portions.

In the first to fourth embodiments, the example in which the protruding portion is provided on the axial direction side of the notch portion of the yoke portion is shown. However, for example, the protruding portion is not provided on the axial direction side of the notch portion of the yoke portion. May be. In this case, the yoke part divided | segmented separately is arrange | positioned between adjacent teeth parts.

In the first to fourth embodiments, an example is shown in which the notch portion of the yoke portion is formed so as to penetrate in the radial direction. For example, a concave portion may be formed in the yoke portion so as to leave a few layers), and the tooth portion may be attached to the concave portion.

In the first to fourth embodiments, the steel plates are laminated in the radial direction by winding a long steel plate in which a portion to which the tooth portion is attached is cut in advance. Although an example of forming the yoke portion has been shown, for example, a plurality of annular steel plates having different diameters may be prepared in advance, and the plurality of annular steel plates may be stacked in the radial direction to configure the yoke portion. Good.

In the first to fourth embodiments, the upper yoke portion and the lower yoke portion are formed so that the steel plates are stacked in the radial direction by winding a long plate-like steel plate (see FIG. 8). Although an example in which the upper yoke portion and the lower yoke portion are integrally formed has been shown, a plurality of yoke portions 71 are provided in the circumferential direction as in the second modification shown in FIG. 20, for example. It may be divided into (two in the second modification). Thereby, the yoke part 71 can be formed by stacking steel plates without using a device for winding a long steel plate.

In the first to third embodiments, the yoke part is divided into two parts in the axial direction. In the fourth embodiment, the yoke part is divided into three parts in the axial direction. The yoke part may be divided into four or more in the axial direction.

In the second embodiment, the notch portions (yoke side contact portions) of both the upper yoke portion and the lower yoke portion are chamfered, and the teeth side that contacts the upper yoke portion and the lower yoke portion of the tooth portion are used. Although an example of chamfering both of the abutting portions has been shown, for example, one yoke side abutting portion of the upper yoke portion or the lower yoke portion is chamfered and the upper yoke portion or the lower yoke portion of the teeth portion is contacted. You may chamfer one teeth side contact part which touches.

In the third embodiment, the cutout portions (yoke side contact portions) of both the upper yoke portion and the lower yoke portion are formed stepwise, and the upper yoke portion and the lower yoke portion of the teeth portion are contacted with each other. An example in which both of the contacting teeth side contact portions are formed stepwise has been shown. For example, one yoke side contact portion of the upper yoke portion or the lower yoke portion is formed stepwise and the upper side of the teeth portion One teeth side contact portion that contacts the yoke portion or the lower yoke portion may be formed stepwise.

11, 41, 51, 61, 71 Yoke

part 11a surface

12, 42, 52, 65, 66, 70 Resin sheet (insulating member)
13, 43, 53 Teeth

portion 13d surface

15, 45, 55, 62 Upper yoke portion (first yoke portion)
15b, 45a, 55a Notch (first notch)
15d,

16d Protrusion

16, 46, 56, 63 Lower yoke (second yoke)
16b, 46a, 56a Notch (second notch)
31

Steel plates

43a, 43b, 53a, 53b Teeth-

side contact portions

45b, 46b, 55b, 56b Yoke-side contact portions 64 Central yoke portion (third yoke portion)
100, 101, 102, 103 Rotating electric machine

Claims

Teeth section (13, 43, 53),
A plurality of yoke parts (11, 41, 51, 61, 71), which are made of steel plates to which the tooth parts are attached and which are laminated in the radial direction, are divided in the axial direction;
A rotating electrical machine comprising an insulating member (12, 42, 52, 65, 66, 70) for insulating between the plurality of yoke portions.
The rotating electrical machine according to claim 1, wherein the insulating member includes a sheet-like insulating member.
The rotating electrical machine according to claim 2, wherein the sheet-like insulating member is disposed such that the plurality of yoke portions are disposed at portions other than the teeth portions that face each other.
The rotating electrical machine according to any one of claims 1 to 3, wherein the insulating member is disposed at a portion of the yoke portion corresponding to a side surface extending in an axial direction and a radial direction of the tooth portion.
The said teeth part is provided with two or more at substantially equal intervals along the circumferential direction, The said insulating member is arrange | positioned so that it may extend in the circumferential direction between the side surfaces of an adjacent teeth part. Rotating electric machine.
The rotating electrical machine according to any one of claims 1 to 5, wherein the insulating member is arranged in an arc shape between the plurality of annular yoke portions divided in the axial direction.
The yoke portion includes a first yoke portion (15, 45, 55) and a second yoke portion (16, 46, 56) that are divided into two in the axial direction,
The rotating electrical machine according to any one of claims 1 to 6, wherein the insulating member is disposed between the first yoke portion and the second yoke portion.
The yoke part is divided into at least three parts in the axial direction, and is located between the first yoke part (62), the second yoke part (63), and the first yoke part and the second yoke part. 3 yoke parts (64),
The insulating member is provided between the first yoke portion and the third yoke portion, and the insulating member is provided between the third yoke portion and the second yoke portion. Item 7. The rotating electrical machine according to any one of Items 1 to 6.
The yoke portion is provided with notches (15b, 16b, 45a, 46a, 55a, 56a) into which the teeth portion are fitted in the axial direction,
The tooth portion is attached to the yoke portion by being fitted in a notch portion of the yoke portion facing each other divided in the axial direction and sandwiched in the axial direction. The rotating electrical machine according to item 1.
The rotating electrical machine according to claim 9, wherein a protruding portion (15d, 16d) is provided on the axial direction side of the notch portion so as to protrude from the axial surface of the tooth portion toward the axial direction.
The yoke portion includes an annular first yoke portion (15, 45, 55, 62) and a second yoke portion (16, 46, 56, 63) divided in the axial direction,
The cutout portion includes a plurality of first cutout portions (15b, 45a, 55a) provided along a circumferential direction of the annular first yoke portion, and a circumferential direction of the annular second yoke portion. A plurality of second notches (16b, 46a, 56a) provided
The tooth portion includes a plurality of teeth portions sandwiched in an axial direction by a plurality of first notch portions of the first yoke portion and a plurality of second notch portions of the second yoke portion. The rotating electrical machine according to 10.
The yoke-side contact portions (45b, 46b) that contact the teeth portion of the notch portion in the axial direction are chamfered, and the teeth-side contact portions that contact the notch portion of the tooth portion in the axial direction ( The rotating electrical machine according to any one of claims 9 to 11, wherein 43a and 43b) are chamfered so as to be in surface contact with the yoke-side contact portion.
The rotating electrical machine according to claim 12, wherein a chamfering angle of the yoke-side contact portion and a chamfering angle of the teeth-side contact portion are approximately 45 degrees.
The yoke side contact portions (55b, 56b) that contact the teeth portion of the notch portion in the axial direction are formed in a step shape, and the teeth side contact that contacts the notch portion of the tooth portion in the axial direction is formed. The rotating electrical machine according to any one of claims 9 to 11, wherein the contact portions (53a, 53b) are formed in a stepped shape so as to mesh with the yoke-side contact portion.
The inclination angle when the step of the stepped yoke side contact portion of the yoke portion is regarded as a slope, and the inclination angle when the step of the stepwise teeth side contact portion of the teeth portion is regarded as a slope are The rotating electrical machine according to claim 14, which is approximately 45 degrees.
The notch portion of the yoke portion penetrates the yoke portion in the radial direction,
The rotating electrical machine according to any one of claims 9 to 15, wherein the teeth portion passes through the notch and is attached to the yoke portion.
The surface (13d) on the outer peripheral side of the tooth portion fitted in the notch is configured to be substantially flush with the outer peripheral surface (11a) of the yoke portion. Rotating electric machine.
The rotating electrical machine according to claim 16 or 17, wherein a portion of the teeth portion fitted to the yoke portion has a substantially rectangular shape when viewed from the axial direction.
The yoke portion is formed such that the steel plates are laminated in the radial direction by winding a long steel plate (31) in which a portion to which the teeth portion is attached is cut in advance. Item 19. The rotating electrical machine according to any one of Items 1 to 18.
The rotary electric machine according to any one of claims 1 to 18, wherein the yoke portion is also divided in a circumferential direction.