Stator of rotating electric machine, rotor of rotating electric machine, and manufacturing method of rotating electric machine

Abstract

The purpose of the present invention is to suppress shifting of insulating paper inserted in a slot of a stator core and to suppress an increase in production costs. A stator for a rotary electrical machine according to the present invention comprises: a stator coil 202; a stator core 201 that has a slot 203 into which the stator coil 202 is inserted; and insulating paper 207 that is disposed between the stator coil 202 and an inner surface of the slot 203. The stator core 201 is configured by laminating a plurality of steel sheets 201a. An adhesive 210 is applied between each of the laminated plurality of steel sheets 201a. The insulating paper 207 is adhered with adhesive 210 that has flowed out to the inner surface of the slot 203.

Description

[Technical Field]

[0001] The present invention relates to a stator for a rotating electric machine, a rotor for a rotating electric machine, and a method for manufacturing a rotating electric machine. [Background technology]

[0002] The stator core of a rotating electrical machine is constructed by applying adhesive to press-punched steel plates, stacking multiple steel plates, and then heating to harden the adhesive. Coils are attached to the slots of the stator core, with insulating paper interposed between them, after the adhesive has hardened. Varnish is then supplied to the stator with the coils attached. The varnish is allowed to permeate the empty spaces in the slots between the coils and teeth, and between the laminated steel plates that make up the stator core. The stator is then heated at a high temperature for a predetermined time to thermally harden the varnish. An example of such a technique is described in Patent Document 1. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. 2018 / 169017 Summary of the Invention [Problem to be solved by the invention]

[0004] In the technology described in Patent Document 1, there are two heat application processes: a process for curing the adhesive and a process for thermally curing the varnish. Therefore, a heating device is required for each process, which poses a problem of increasing the cost of the manufacturing equipment.

[0005] Furthermore, the two heating processes increase the amount of energy input during the manufacturing of the rotating electrical machine, resulting in an increase in the amount of carbon dioxide emissions during the manufacturing of the rotating electrical machine.

[0006] Furthermore, insulating paper is inserted into the slots of the stator core, but the technology described in Patent Document 1 has the problem that the position of the insulating paper shifts when the coil is attached to the slot, resulting in insufficient insulation between the slots of the stator core and the coil.

[0007] Furthermore, no consideration has been given to the fixation of the permanent magnets inserted into the rotor core.

[0008] An object of the present invention is to prevent the insulating paper inserted into the slots of the stator core from shifting, and to prevent an increase in production costs.

[0009] Another object of the present invention is to suppress movement of the permanent magnets inserted in the rotor core and to suppress an increase in production costs. [Means for solving the problem]

[0010] In order to achieve the above object, the present invention provides a stator for a rotating electric machine comprising a stator coil, a stator core having slots into which the stator coil is inserted, and insulating paper placed between the stator coil and the inner surface of the slot, wherein the stator core is constructed by stacking a plurality of steel plates, and an adhesive is applied between each of the stacked steel plates, and the insulating paper is adhered by the adhesive that flows out onto the inner surface of the slot.

[0011] The present invention also provides a rotor for a rotating electric machine that includes a rotor core having a permanent magnet and a magnet insertion hole into which the permanent magnet is inserted, wherein the rotor core is constructed by stacking a plurality of steel plates, and adhesive is applied between each of the stacked steel plates, and the permanent magnet is adhered by the adhesive that flows out onto the inner surface of the magnet insertion hole. [Effects of the Invention]

[0012] According to the present invention, it is possible to suppress displacement of the insulating paper inserted into the slots of the stator core, and also to suppress an increase in production costs.

[0013] Furthermore, according to the present invention, it is possible to suppress the movement of the permanent magnets inserted in the rotor core and also to suppress an increase in production costs. [Brief explanation of the drawings]

[0014] [Figure 1] 1 is a cross-sectional view of a rotating electric machine according to a first embodiment of the present invention. [Figure 2] 2 is a partial cross-sectional view of a part of the rotating electric machine taken along the axial direction. FIG. [Figure 3] 1 is a schematic perspective view of a stator for a rotating electric machine according to a first embodiment of the present invention; [Figure 4] FIG. 2 is a partial perspective view showing a state in which insulating paper is inserted into slots in the stator core. [Figure 5] FIG. 2 is a partial perspective view showing a state in which a stator coil is inserted into a slot of a stator core via insulating paper. [Figure 6] FIG. 3 is a view of a portion of a steel plate constituting a stator core as viewed from the axial direction. [Figure 7] 1 is a view of a portion of a stator core formed by stacking a plurality of steel plates, viewed from the axial direction. [Figure 8] FIG. 8 is an enlarged cross-sectional view taken along line VIII-VIII in FIG. 7. [Figure 9] 10A to 10C are diagrams illustrating a method for manufacturing a stator according to a comparative example. [Figure 10] 5A to 5C are diagrams illustrating a method for manufacturing the stator according to the first embodiment of the present invention. [Figure 11] FIG. 10 is a view of a part of a steel plate constituting a rotor core according to a second embodiment of the present invention, as viewed from the axial direction. [Figure 12] 1 is a view of a portion of a rotor core made of a plurality of laminated steel plates as viewed from the axial direction. [Figure 13] 13A to 13C are enlarged cross-sectional views taken along line XIII-XIII in FIG. 12 and diagrams showing steps. DETAILED DESCRIPTION OF THE INVENTION

[0015] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. Like elements are designated by like reference numerals and similar descriptions will not be repeated.

[0016] The various components of the present invention do not necessarily have to be independent entities, and it is acceptable for one component to be made up of multiple members, for multiple components to be made up of one member, for one component to be part of another component, or for part of one component to overlap with part of another component. [Example]

[0017] In the following description, an electric motor used in a hybrid vehicle is used as an example of a rotating electric machine. In the following description, "axial direction" refers to the direction along the rotation axis of the rotating electric machine. Furthermore, "circumferential direction" refers to the direction along the rotation direction of the rotating electric machine. "Radial direction" refers to the radial direction (radial direction) when the rotation axis of the rotating electric machine is the center. "Inner peripheral side" refers to the radially inside (inner diameter side), and "outer peripheral side" refers to the opposite direction, i.e., the radially outside (outer diameter side).

[0018] Fig. 1 is a schematic cross-sectional view of a rotating electric machine according to a first embodiment of the present invention, Fig. 2 is a partial cross-sectional view of a part of the rotating electric machine cut along the axial direction.

[0019] As shown in Figures 1 and 2, the rotating electric machine 1 includes a rotor 10 that rotates around a rotating shaft 11, a stator 20 arranged opposite the outer peripheral surface of the rotor 10, and a housing 30 that accommodates the rotor 10 and the stator 20.

[0020] The rotor 10 includes a rotor core 101 and a rotating shaft 11. The rotor core 101 is made by laminating thin steel plates 101a (silicon steel plates). The rotating shaft 11 is fixed to the center of the rotor core 101. The rotating shaft 11 is rotatably held by bearings 41 and 42 attached to a liquid cooling jacket 40, and rotates at a predetermined position within the stator 20, facing the stator 20. The rotor 10 is also provided with permanent magnets 102 and end rings (not shown).

[0021] The stator 20 includes a stator core 201 and a stator coil 202. Like the rotor core 101, the stator core 201 is also made by laminating thin steel plates 201a (silicon steel plates). The stator coils 202 are inserted into a number of slots 203 (see FIGS. 3, 4, and 5) provided on the inner periphery of the stator core 201. Heat generated from the stator coils 202 is transferred to the housing 30 via the stator core 201 and is dissipated by the refrigerant RF circulating inside the liquid cooling jacket 40.

[0022] One axial end of the stator 20 is provided with a welding-side coil end 204, which is a coil end of the stator coil 202. The welding-side coil end 204 has a joint 206 joined by welding. Meanwhile, the other axial end of the stator 20 is provided with a non-welding-side coil end 205, which is a coil end of the stator coil 202.

[0023] The stator 20 is fixed to the inner periphery of the housing 30. The rotor 10 is rotatably supported on the inner periphery of the stator 20. The housing 30 constitutes the outer casing of the electric motor and is formed into a cylindrical shape by cutting an iron-based material such as carbon steel, by casting steel or an aluminum alloy, or by pressing. The housing 30 is also called a frame.

[0024] A liquid cooling jacket 40 is fixed to the outer periphery of the housing 30. The inner periphery wall of the liquid cooling jacket 40 and the outer periphery wall of the housing 30 form a refrigerant passage 43 for a liquid refrigerant RF such as oil. This refrigerant passage 43 serves as a passage for transporting the refrigerant RF from a refrigerant (oil) storage space 44 to the outer periphery of the rotating electrical machine, and is formed to prevent liquid leakage. The liquid cooling jacket 40 houses bearings 41 and 42 for the rotating shaft 11, and is also called a bearing bracket.

[0025] In the case of direct liquid cooling, the refrigerant RF passes through the refrigerant passage 43 and flows out from the refrigerant outlets 45 and 46 toward the stator 20 to cool the stator 20 .

[0026] To assemble the rotating electric machine, the stator 20 is inserted into the housing 30 and attached to the inner peripheral wall of the housing 30 in advance, and then the rotor 10 is inserted into the stator 20. Next, the rotating shaft 11 is fitted with the bearings 41 and 42, and is then assembled into the liquid cooling jacket 40.

[0027] Fig. 3 is a schematic perspective view of a stator for a rotating electric machine according to the first embodiment of the present invention. Fig. 4 is a partial perspective view showing a state in which insulating paper is inserted into slots of a stator core. Fig. 5 is a partial perspective view showing a state in which stator coils are inserted into slots of a stator core via insulating paper.

[0028] The stator 20 is composed of an annular stator core 201, a number of slots 203 provided on the inner periphery of the stator core 201, and stator coils 202 inserted into the slots 203 via insulating paper 207. The slots 203 are formed between a plurality of teeth 209 extending from an annular stator yoke 208 toward the rotor 10 (inner diameter side).

[0029] The stator coil 202 uses a conductor (copper wire in this embodiment) with an insulating coating and a substantially rectangular cross section. By using a coil conductor with a substantially rectangular cross section, the space factor within the slot is improved, and the efficiency of the rotating electric machine 1 is improved.

[0030] The stator core 201, slots 203, and stator coils 202 are fixed together with varnish (adhesive varnish, not shown). That is, the segment-shaped stator coils 202 are inserted into the slots 203 into which insulating paper 207 has been inserted, and then welded together to form the stator coils 202. Thereafter, the slots 203 are impregnated with varnish, and the stator coils 202 are fixed in place by heating.

[0031] Insulating paper 207 is provided on stator core 201 to insulate slots 203 of stator core 201 from stator coils 202 and to fix stator coils 202 within slots 203. Insulating paper 207 is disposed inside slot 203, between stator coils 202 and slots 203. The insulating paper 207 has a cross section shaped like a square, a B, or an S so as to encase stator coils 202.

[0032] As described above, the stator core 201 is formed by stacking a plurality of thin steel plates 201a (silicon steel plates). Adhesive is applied between each of the stacked steel plates 201a, and adjacent steel plates 201a are fixed together with the adhesive. The adhesive is hardened by heating. Therefore, the stator core 201 requires a process in which adhesive is applied to the steel plates 201a and then the steel plates 201a are heated in a stacked state. Furthermore, insulating paper 207 is disposed in the slots 203, but when the stator coil 202 is inserted into the slots 203, the insulating paper 207 may become misaligned, resulting in insufficient insulation between the stator coil 202 and the stator core 201. Means for solving these problems are described below.

[0033] Fig. 6 is a view of some of the steel plates that make up the stator core, viewed from the axial direction. In Fig. 6, the stator core 201 is made up of a plurality of stacked steel plates 201a. An adhesive is applied between each of the stacked steel plates 201a, and adjacent steel plates 201a are fixed together by the adhesive. To join the stacked steel plates 201a together, an adhesive 210 is applied to the steel plates 201a. For example, a one-component epoxy heat-curing adhesive is used as the adhesive 210.

[0034] The adhesive 210 is applied in a dotted manner to the portion that constitutes the stator yoke 208 (adhesive 210b) and the portion that constitutes the teeth 209 (adhesive 210a). Of the adhesive 210 applied to the steel plate 201a, the adhesive 210a that is applied to the portion that constitutes the teeth 209 is applied closer to one of the slots 203 in the circumferential direction than the circumferential center C1 of the teeth 209. In other words, the adhesive 210a is applied to the end of the teeth 209 on the slot 203 side.

[0035] Moreover, adhesive 210a is applied to the portions constituting tooth portion 209 closer to the base portion (stator yoke 208 side) of tooth portion 209 than to the tip portion (rotor 10 side) of tooth portion 209. Then, multiple steel plates coated with adhesive 210 are stacked to form stator core 201.

[0036] Fig. 7 is a view of a part of a stator core made of a plurality of laminated steel plates as seen from the axial direction, and Fig. 8 is an enlarged cross-sectional view taken along line VIII-VIII in Fig. 7.

[0037] When steel plates 201a coated with adhesive 210 are stacked, the adhesive 210 sandwiched between the steel plates 201a spreads along the surfaces of the steel plates 201a, forming an adhesive layer. The adhesive 210a applied to the portions that make up the teeth 209 spreads over the teeth 209, and some of it flows out onto the inner surfaces of the slots 203. The amount of adhesive 210a that flows out onto the inner surfaces of the slots 203 is greater on the side where the adhesive is applied closer to the slot 203 than the circumferential center C1 of the teeth 209. In FIG. 7, the amount of adhesive 210a that flows out is greater on the side of the slot 203 on the right side of the page. The adhesives 210a that flow out onto the inner surfaces of the slots 203 are arranged with gaps in the axial direction, as shown in FIG. 8.

[0038] In this embodiment, the adhesive 210 a flowing onto the inner surface of the slot 203 is used to adhere the insulating paper 207 , thereby fixing the insulating paper 207 inside the slot 203 .

[0039] Next, a method for manufacturing the stator 20 will be described with reference to Figures 9 and 10. Figure 9 is a diagram showing a method for manufacturing a stator according to a comparative example. First, a method for manufacturing a stator according to a comparative example will be described.

[0040] In FIG. 9, a thin plate is core-punched to produce a plurality of steel plates 201a (step S61).

[0041] Next, adhesive 210 is applied to the punched steel plates 201a, and the steel plates 201a are stacked (step S62).

[0042] The steel plates 201a are heated in a stacked state to harden the adhesive 210, thereby producing the stator core 201 (step S63).

[0043] After the adhesive 210 has hardened, the insulating paper 207 is inserted into the slots 203 of the stator core 201 (step S64).

[0044] After the insulating paper 207 is inserted into the slot 203, the stator coil 202 is inserted into the slot 203 (step S65).

[0045] After all the stator coils 202 are inserted into the slots 203, the terminals of the stator coils 202 are welded to connect the stator coils 202 (step S66).

[0046] After each stator coil 202 is connected, the stator coil 202 is varnished or powder coated (step S67).

[0047] After the stator coil 202 is varnished or powder coated, the stator 20 is heated to harden the varnish or powder coating, thereby completing the stator 20 (step S68).

[0048] After the varnish and powder coating have hardened, the stator 20 is packaged (step S69).

[0049] In the comparative example, the stator 20 is manufactured as described above, but two heating processes are required: one for curing the adhesive 210 and the other for curing the varnish and powder. This increases the number of work processes and the need for additional production equipment, resulting in increased production costs. The two heating processes also increase the amount of energy input during the manufacture of the rotating electric machine, resulting in increased carbon dioxide emissions during the manufacture of the rotating electric machine. Furthermore, when the stator coil 202 is inserted into the slot 203, the insulating paper 207 shifts, resulting in insufficient insulation between the stator coil 202 and the stator core 201. Means for resolving these issues are described below.

[0050] FIG. 10 is a diagram illustrating a method for manufacturing the stator according to the first embodiment of the present invention.

[0051] In FIG. 10, a thin plate is core-punched to produce a plurality of steel plates 201a (step S71).

[0052] Next, adhesive 210 is applied to the punched steel plates 201a, and the steel plates 201a are stacked to produce the stator core 201 (step S72). Of the adhesive 210 applied to the steel plates 201a, adhesive 210a applied to the portions that form the teeth portions 209 is applied closer to one of the slots 203 in the circumferential direction than the circumferential center C1 of the teeth portions 209. A portion of the adhesive 210a flows out onto the inner surface of the slot 203.

[0053] Insulating paper 207 is inserted into slot 203 of stator core 201, and insulating paper 207 is adhered to the inner surface of slot 203 by adhesive 210a flowing out, thereby preventing displacement of insulating paper 207 (step S73).

[0054] After the insulating paper 207 is inserted into the slot 203 and adhered, the stator coil 202 is inserted into the slot 203 (step S74).

[0055] After all the stator coils 202 are inserted into the slots 203, the terminals of the stator coils 202 are welded to connect the stator coils 202 (step S75).

[0056] After each stator coil 202 is connected, the stator coil 202 is varnished or powder coated (step S76).

[0057] After the stator coil 202 is varnished and powder coated, the stator 20 is heated to harden the adhesive 210, varnish, and powder coating, thereby completing the stator 20 (step S77).

[0058] After the varnish and powder coating has hardened, the stator 20 is packaged (step S78).

[0059] As shown in FIG. 10 , the process of Example 1 can eliminate one step. That is, the step of curing the adhesive is performed simultaneously with the step of curing the varnish and powder coating, thereby eliminating one step and eliminating the need for heating equipment to cure the adhesive, thereby reducing production costs. In addition, in Example 1, a portion of the adhesive 210a is allowed to flow onto the inner surface of the slot 203, and before the adhesive 210a is cured, the insulating paper 207 is inserted into the slot 203 and adhered with the adhesive 210a. This prevents the insulating paper 207 from shifting when the stator coil 202 is inserted, ensuring insulation between the stator core 201 and the stator coil 202. [Example]

[0060] Next, a second embodiment will be described with reference to Figures 11 to 13. In the first embodiment, the configuration of the stator 20 was described, but in the second embodiment, the configuration of the rotor 10 will be described.

[0061] FIG. 11 is a view of a portion of a steel plate constituting a rotor core according to a second embodiment of the present invention, viewed from the axial direction. In FIG. 11, the rotor core 101 is formed by stacking a plurality of steel plates 101a. An adhesive is applied between each of the stacked steel plates 101a, and adjacent steel plates 101a are fixed to each other by the adhesive. For example, a one-component epoxy heat-curing adhesive is used as the adhesive 110. Furthermore, magnet insertion holes 103 for inserting permanent magnets 102 are formed in the steel plates 101a constituting the rotor core 101. The magnet insertion holes 103 are formed radially closer to the stator 20 side (outer diameter side). To join the stacked steel plates 101a together, adhesives 110 (110a to 110d) are applied to the steel plates 101a.

[0062] The adhesive 110 is applied in a dotted pattern to the portion (adhesive 110a) that constitutes the outer diameter side of the magnet insertion hole 103, the portion (adhesive 110b) that constitutes the inner diameter side of the magnet insertion hole 103, the portion (adhesive 110c) that constitutes the bridge portion of two opposing magnet insertion holes 103, and the portion (adhesive 110d) that constitutes the inner diameter side of the rotor core 101. Of the adhesive 110 applied to the steel plate 101a, adhesives 110a to 110 are applied to the ends of the magnet insertion hole 103. Then, multiple steel plates coated with adhesive 110 are stacked to form the rotor core 101.

[0063] Fig. 12 is a view of a part of a rotor core made of a plurality of laminated steel plates as seen from the axial direction. Fig. 13 is an enlarged cross-sectional view taken along line XIII-XIII in Fig. 12 and a diagram showing the process.

[0064] When the steel plates 101a coated with adhesive 110 are stacked, the adhesive 110 sandwiched between the steel plates 101a spreads along the surfaces of the steel plates 101a, forming an adhesive layer. The adhesives 110a-110c applied to the ends of the magnet insertion holes 103 spread along the surfaces of the steel plates 101a, and some of them flow out onto the inner surfaces of the magnet insertion holes 103. The adhesives 110a-110c that flow out onto the inner surfaces of the slots 203 are arranged with gaps in the axial direction.

[0065] In this embodiment, the permanent magnet 102 is adhered by using adhesives 110 a to 110 c that flow onto the inner surface of the magnet insertion hole 103 , and the permanent magnet 102 is fixed in the magnet insertion hole 103 .

[0066] Explain the production process.

[0067] In FIG. 13, a thin plate is core-punched to produce a plurality of steel plates 101a (step S81).

[0068] Next, adhesive 110 is applied to the punched steel plates 101a, and the steel plates 101a are stacked (step S82). Of the adhesive 110 to be applied to the steel plates 101a, adhesives 110a to 110c are applied to the ends of the portions where the magnet insertion holes 103 are to be formed.

[0069] The permanent magnet 102 is inserted into the magnet insertion hole 103, and the permanent magnet 102 is adhered by the adhesives 110a to 110c that flow onto the inner surface of the magnet insertion hole 103, thereby restricting movement of the permanent magnet 102 (step S83).

[0070] After inserting the permanent magnets 102, the rotor 10 is heated to harden the adhesive 110 (step S87).

[0071] After the adhesive 110 has hardened, the rotor 10 is packaged (step S85).

[0072] In Example 2, a portion of the adhesive 110a to 110c is allowed to flow onto the inner surface of the magnet insertion hole 103, and before the adhesive 110a to 110c is hardened, the permanent magnet 102 is inserted into the magnet insertion hole 103 and adhered with the adhesive 110a to 110c. This prevents the permanent magnet 102 from moving within the magnet insertion hole 103 as the rotor 10 rotates, thereby preventing damage to the permanent magnet 102.

[0073] Furthermore, according to Example 2, after inserting the permanent magnet 102 into the magnet insertion hole 103, there is no need to pour new adhesive into the gap between the magnet insertion hole 103 and the permanent magnet 102 to fix the permanent magnet 102, so the manufacturing process can be reduced and productivity can be improved.

[0074] When manufacturing a rotating electric machine, it is preferable to apply at least either of Example 1 or Example 2. When either Example 1 or Example 2 is applied, it is preferable to execute the steps described in Example 1 or Example 2 (see FIGS. 10 and 13).

[0075] The present invention is not limited to the above-described embodiments and includes various modifications. For example, the above-described embodiments have been described in detail to clearly explain the present invention, and the present invention is not necessarily limited to those including all of the described configurations. Furthermore, it is possible to replace part of the configuration of one embodiment with the configuration of another embodiment, or to add the configuration of another embodiment to the configuration of one embodiment. Furthermore, it is possible to add, delete, or replace part of the configuration of each embodiment with other configurations. [Explanation of symbols]

[0076] 1... rotating electric machine, 10... rotor, 11... rotating shaft, 20... stator, 30... housing, 40... liquid cooling jacket, 41, 42... bearing, 43... refrigerant passage, 44... refrigerant (oil) storage space, 45, 46... refrigerant outlet, 101... rotor core, 101a... steel plate, 102... permanent magnet, 103... magnet insertion hole, 110, 110a, 110b, 110c, 110d... adhesive, 201... stator core, 201a... steel plate, 202... stator coil, 203... slot, 204... welding side coil end, 205... anti-welding side coil end, 206... joint portion, 207... insulating paper, 208... stator yoke, 209... teeth portion, 210, 210a, 210b... adhesive

Claims

1. a stator core having a stator coil and a slot into which the stator coil is inserted; an insulating paper disposed between the stator coil and an inner surface of the slot, The stator core is formed by laminating a plurality of steel plates, Applying an adhesive between each of the plurality of stacked steel plates; A stator for a rotating electric machine, characterized in that the insulating paper is adhered by the adhesive that flows out onto the inner surface of the slot.

2. In claim 1, the stator core includes an annular stator yoke, a plurality of teeth extending from the stator yoke and arranged in a circumferential direction, and the slots formed between the plurality of teeth, The stator of a rotating electric machine, wherein the adhesive is applied closer to the slot than the circumferential center of the tooth portion.

3. In claim 2, A stator for a rotating electric machine, characterized in that the adhesive is applied to the end of the teeth on the slot side.

4. In claim 3, The stator of a rotating electric machine, wherein the adhesive is applied closer to the stator yoke side.

5. A rotor for a rotating electric machine including a rotor core having a permanent magnet and a magnet insertion hole into which the permanent magnet is inserted, The rotor core is formed by laminating a plurality of steel plates, Applying an adhesive between each of the plurality of stacked steel plates; A rotor for a rotating electric machine, characterized in that the permanent magnets are adhered with the adhesive that flows onto the inner surface of the magnet insertion holes.

6. In claim 5, A rotor for a rotating electric machine, characterized in that the adhesive is applied to the end of the portion where the magnet insertion hole is formed.

7. In claim 6, The magnet insertion holes are provided in plural, bridge portions are provided between the plurality of magnet insertion holes; A rotor for a rotating electric machine, characterized in that the adhesive is applied to the bridge portion.

8. A method for manufacturing a rotating electric machine having a stator and a rotor, comprising: the stator includes a stator coil and a stator core having slots into which the stator coil is inserted via insulating paper; the rotor includes a rotor core having a permanent magnet and a magnet insertion hole into which the permanent magnet is inserted, the stator core and the rotor core are configured by stacking a plurality of steel plates and applying an adhesive between each of the stacked steel plates; The adhesive is caused to flow onto at least one of an inner surface of the slot and an inner surface of the magnet insertion hole, The insulating paper is inserted into the slot, and after the insulating paper is inserted, the stator coil is inserted; The permanent magnet is inserted into the magnet insertion hole, A method for manufacturing a rotating electric machine, characterized in that at least one of the insulating paper or the permanent magnet is adhered with the adhesive that has flowed out onto the inner surface of the slot or the inner surface of the magnet insertion hole.

9. In claim 8, A manufacturing method for a rotating electric machine, characterized in that when the insulating paper is adhered to the inner surface of the slot with the adhesive that has flowed out, after the stator coil is inserted into the slot, varnish and powder coating are applied to the stator, and after the varnish and powder coating, the stator is heated to harden the adhesive and the varnish and powder coating.

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