JP5293436B2 - Stator and stator manufacturing method in electric machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent the displacement and destruction of an insulation sheet used for a stator of an electric machine. <P>SOLUTION: An outer coil 14 and an inner coil 15 are preliminarily formed in a predetermined shape. An insulation sheet 17 is attached to insertion parts 18 and 19 of the outer coil 14 by using an adhesive. A pair of interphase insulation parts 171 and 172 is integrally formed with the insulation sheet 17. The interphase insulation parts 171 and 172 are bent to be arranged between crossover parts 243 and 253 of coil ends 24 and 25 of the inner coil 15 and rising parts 201 (or a rising part 202), 211 (or a rising part 212) of coil ends 20 and 21 of the outer coil 14. A slot insulation sheet 26 is attached to an insertion parts 22 and 23 of the inner coil 15 by using an adhesive. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to insulation between phases of coil ends of a plurality of coils shaped into a predetermined shape, or a coil and a stator core in a slot between a plurality of teeth arranged on the inner periphery of an annular stator core constituting a stator. The present invention relates to a stator in an electric machine provided with an insulating sheet for performing insulation between and a method for manufacturing a stator.

  In order to ensure insulation between the stator core and the coil, a slot insulating sheet is interposed between the slot forming surface and the coil (see, for example, Patent Document 2). This slot insulating sheet is previously inserted into the slot, and then the coil is incorporated into the slot.

  An interphase insulating sheet is interposed between the coil ends of the coils having different phases.

Japanese Patent Laid-Open No. 2-156605 JP 2008-154358 A

However, when the coil is assembled after inserting the slot insulating sheet into the slot, the slot insulating sheet may be displaced or damaged.
Patent Document 1 discloses a configuration in which an electric wire bundle (for example, a coil in a rotating electrical machine) is surrounded by an insulating sheet, and the periphery of the insulating sheet is wound with an insulating tape.

However, when the wire bundle covered with the insulating sheet and the insulating tape as described above is wound around a winding mold to shape the coil, the insulating tape may be displaced or damaged.
An object of the present invention is to prevent an insulating sheet used for a stator of an electric machine from being displaced or damaged.

According to the first to seventh aspects of the present invention, a plurality of teeth are arranged on the stator core, and a plurality of coils after being annularly shaped are incorporated in slots between the plurality of teeth, and the plurality of coils In the invention according to claim 1, the insulating sheet is formed in advance in an outer shape corresponding to the insulating coating region of the coil, and the insulating sheet is provided. The sheet is attached to the coil so as to cover the insulating coating region of the coil.

The insulation coating region refers to a coil surface region corresponding to a location where insulation is required between the coil and the stator core, or a coil surface region corresponding to a location where insulation is required between a plurality of coils, and the coil contacts other members. Or a part that may come into contact. Attaching means that the insulating paper is fixed so as not to move completely with respect to the coil by an adhesive or the like, or that the insulating paper is only wrapped around the coil and is not fixed. The insulating coating region of the coil shaped in an annular shape is covered with an insulating sheet in advance, and the coil is incorporated into the slot in this state, so that the insulating sheet may be displaced from the coil or the insulating sheet may be damaged. There is no.
In particular, according to the first aspect of the present invention, the insulating sheet includes an interphase insulating portion for insulating between phases, and a slot insulating portion for insulating between the coil and the stator core in the slot. The electric machine is a rotating electric machine having an annular stator core, and the coil includes an outer coil and an inner coil arranged alternately in a circumferential direction of the annular stator core, The coil end of the outer coil extends inward in the radial direction of the stator core from the transition portion disposed outside the coil end of the inner coil in the radial direction of the annular stator core, and both ends of the transition portion. And a coil end of the inner coil is a coil end of a pair of adjacent outer coils. The insulating sheet is attached to the outer coil, and the interphase insulating portion includes a transition portion of the coil end of the inner coil and a standing portion of the coil end of the outer coil. It is interposed between.
Particularly, in the present invention of claim 2, the electric machine is a rotating electric machine having an annular stator core, and the coil includes an outer coil and an inner coil arranged alternately in a circumferential direction of the annular stator core, The coil end of the outer coil extends inward in the radial direction of the stator core from a transition portion arranged outside the coil end of the inner coil in the radial direction of the annular stator core, and both ends of the transition portion. And the coil end of the inner coil includes a crossing portion straddling the standing part of the coil ends of a pair of adjacent outer coils, and the insulating sheet is attached to the inner coil. And the insulating sheet includes an inner side of a transition portion of the coil end of the inner coil and the outer coil. It is interposed between the upright portion of the coil end.
A stator provided with an outer coil and an inner coil is suitable as an application target of the present invention.

  In a preferred example, the insulating sheet covers the insulating coating region by bending or bending a flat sheet previously formed into an outer shape corresponding to the insulating coating region of the coil. .

  The insulation coating area of the coil shaped in advance to a predetermined shape is covered with a flat sheet bent or curved insulation sheet in advance, and the coil is incorporated into the slot in this state, so the insulation sheet is displaced from the coil. And the insulation sheet is not damaged.

In a preferred example, the electric machine is a distributed winding rotary electric machine in which the coil is distributedly wound.
In a preferred example, the insulating coating region is at least one of a peripheral surface of an insertion portion of the coil inserted into the slot and a surface of a coil end of the coil.

The good suitable examples, the inner coil after the crossover portion on the outer coil and the coil end after the transfer section and the upright section to the coil end is formed is formed is incorporated into the stator core .

Since it is not necessary to shape the coil end after incorporating the coil, the inconveniences such as displacement and breakage of the insulating sheet that are likely to occur when shaping the coil end are eliminated.
In a preferred example, the insulating sheet includes a band wound around a transition portion of the coil end.

The band contributes to preventing the insulation sheet from falling off the coil.
According to the present invention of claim 8, a plurality of teeth are arranged on the stator core, and a plurality of coils after being shaped into an annular shape are incorporated in slots between the plurality of teeth, and the insulation covers the plurality of coils. intended for a stator manufacturing method in the electric machine sheet is provided, before Symbol insulating sheet and the insulating sheet forming step of forming the outer shape corresponding to the insulating coating region of the coil, insulating coating of the insulating sheet the coil A mounting step of mounting in the region, and a mounting step of incorporating the coil mounted with the insulating sheet into the slot.

  A stator manufacturing method in which a coil equipped with an insulating sheet formed in a predetermined shape is incorporated into a slot while being shaped into a predetermined shape is used to prevent the insulating sheet from being displaced relative to the coil and to prevent damage to the insulating sheet. It is valid.

Further, in the present invention of claim 8, the stator core is formed in an annular shape, the coil is composed of an outer coil and an inner coil that are alternately arranged in a circumferential direction of the annular stator core, and the insulating sheet includes the insulating sheet, An interphase insulating sheet for insulating between the coil end of the outer coil and the coil end of the inner coil, and a first insulating sheet for insulating between the outer coil and the stator core in the slot And a second insulating sheet for performing insulation between the inner coil and the stator core in the slot, and the mounting step covers the insulating coating region so as to cover the insulating coating region of the outer coil. The outer insulating coil and the first insulating sheet and the interphase insulating sheet, which are formed in an outer shape corresponding to the outer coil. A first mounting step for mounting, and a second mounting for mounting the second insulating sheet previously formed in an outer shape corresponding to the insulating coating region so as to cover the insulating coating region of the inner coil to the inner coil. The assembling step includes a first assembling step of incorporating the outer coil with the first insulating sheet and the interphase insulating sheet fixed into the slot, and a coil of the inner coil after the first assembling step. A second assembling step of incorporating the inner coil, to which the second insulating sheet is fixed, into the slot so that the end crossing portion straddles at least a part of the coil ends of the pair of adjacent outer coils, The first insulating sheet has a small number of coil end transitions of the inner coil and the coil end of the outer coil. Both are interposed between said portion.

  The stator manufacturing method in which the outer coil with the insulating sheet and the inner coil with the insulating sheet are shaped into a predetermined shape is incorporated into the slot in order to prevent the insulating sheet from slipping from the coil and the insulating sheet from being damaged. It is effective for.

  The electric machine of the present invention has an excellent effect that the insulating sheet used for the stator of the electric machine can be prevented from being displaced or damaged.

The end view of the stator which shows 1st Embodiment. The perspective view of a stator. (A) is an end view of the main core. (B) is an end view of the stator core. (A), (b) is a perspective view which shows the positional relationship of the outer coil 14 and the inner coil 15. FIG. (A), (b) is a perspective view for demonstrating fixation of the insulating sheet 17 to the outer coil 14. FIG. (C), (d) is a perspective view for demonstrating fixation of the slot insulation sheet 26 to the inner coil 15. FIG. (A) is a perspective view for demonstrating the bending of the insulating sheet 17. FIG. FIG. 6B is a perspective view for explaining bending of the slot insulating sheet 26. (A), (b) is an end elevation for demonstrating the assembly | attachment of the outer coil 14 and the teeth 13B. (A), (b) is an end elevation for demonstrating the assembly | attachment of the inner coil 15 and the teeth 13C. The wiring diagram of the outer coil 14 and the inner coil 15. FIG. The 2nd Embodiment is shown, (a) is a perspective view which shows the outer coil 14 to which the slot insulating sheet 27 was fixed. FIG. 4B is a perspective view showing the inner coil 15 with the slot insulating sheet 26 and the interphase insulating sheet 28 fixed thereto. (A) is a perspective view which shows the positional relationship of the outer coil 14 and the inner coil 15. FIG. FIG. 4B is a perspective view for explaining bending of the slot insulating sheet 27. FIG. 4C is a perspective view for explaining bending of the interphase insulating sheet 28. Another embodiment is shown, (a) is an end view showing an outer coil 14 and an insulating sheet 17B. (B) is a perspective view which shows the bending of the insulating sheet 17B.

Hereinafter, a first embodiment of the present invention will be described with reference to FIGS.
As shown in FIG. 1, the stator 11 constituting the rotating electrical machine M includes an annular stator core 12 and an outer coil incorporated in a slot 121 between teeth 13 </ b> A, 13 </ b> B, and 13 </ b> C arranged on the inner periphery of the stator core 12. 14 and an inner coil 15 incorporated in the slot 121. Reference numeral 16 denotes a rotor disposed in the ring of the annular stator 11. In the present embodiment, the number of slots 121 is 24.

  As shown in FIG. 3B, the stator core 12 is assembled and fixed to an annular main core 120 integrally formed with a plurality of teeth 13 </ b> A (12 in this embodiment) and an inner periphery of the annular main core 120. A plurality of teeth 13B and 13C (six in this embodiment) are provided. 3A shows a state where the teeth 13B and 13C are removed from the main core 120. FIG. The teeth 13A, 13B, and 13C are arranged at an equal pitch in the circumferential direction of the annular stator 11.

4A and 4B show the positional relationship between the adjacent outer coil 14 and inner coil 15 incorporated in the slot 121. FIG.
The outer coil 14 is shaped in advance into an annular shape including a pair of insertion portions 18 and 19 inserted into the pair of slots 121 and a pair of coil ends 20 and 21 protruding from the slots 121. Similarly, the inner coil 15 is shaped in advance into an annular shape including a pair of insertion portions 22 and 23 that are inserted into the pair of slots 121 and a pair of coil ends 24 and 25 that protrude outward from the slots 121. . The ring here is not limited to a round shape.

  The outer coil end 20 has standing portions 201 and 202 standing at the end of the outer coil end 20 from the slot 121 (see FIG. 3B) to the outside on one end face 122 (see FIG. 2) side of the stator core 12; It consists of a transition part 203 between the upright parts 201 and 202. The outer coil end 21 is erected from the slot 121 to the outside on the end surface of the stator core 12 (end surface opposite to the end surface 122) 123 (see FIGS. 2 and 3B) from the slot 121. It consists of the part 211,212 and the transition part 213 between the standing part 211,212.

  The inner coil end 24 has standing portions 241 and 242 standing at the end thereof and standing outward from the slot 121 on the end face 122 (see FIG. 2) side of the stator core 12, and a transition portion 243 between the standing portions 241 and 242. It consists of. The inner coil end 25 is standing at the end of the inner coil end 25 from the slot 121 to the outside of the end surface of the stator core 12 (the end surface opposite to the end surface 122 shown in FIG. 2) 123 (see FIGS. 2 and 3B). The upright portions 251 and 252 and the transition portion 253 between the upright portions 251 and 252.

  The coil ends 20 and 21 of the outer coil 14 are disposed outside the coil ends 24 and 25 of the inner coil 15 in the radial direction of the annular stator core 12, and the coil ends 24 and 25 of the inner coil 15 are adjacent to each other. The coil ends 20 and 21 of the pair of outer coils 14 straddle the upright portions 201, 202, 211, and 212. When viewed in the direction of the axis L of the stator core 12 (see FIGS. 1 and 2), the transition portion 243 of the coil end 24 of the inner coil 15 and the upright portions 201 and 202 which are part of the coil end 20 of the outer coil 14. And overlap. Similarly, when viewed in the direction of the axis L of the stator core 12, the transition portion 253 of the coil end 25 of the inner coil 15 overlaps with the upright portions 211 and 212 that are part of the coil end 21 of the outer coil 14. .

  As shown in FIG. 4B, the insulating sheet 17 is fixed to the peripheral surfaces 181 and 191 (insulation coating region) of the insertion portions 18 and 19 of the outer coil 14 using an adhesive. The insulating sheet 17 that covers the peripheral surfaces 181 and 191 is formed of insulating paper having electrical insulation. The insulating sheet 17 has a slot insulating portion 173 that is bent so as to surround the insertion portions 18 and 19 and insulates between the insertion portions 18 and 19 and the slot 121 of the stator core 12. A pair of interphase insulating portions 171 and 172 are integrally formed in the insulating sheet 17 in the slot insulating portion 173. One interphase insulating portion 171 is bent so as to be disposed between the transition portion 243 of the coil end 24 of the inner coil 15 and the rising portion 201 (or the rising portion 202) of the coil end 20 of the outer coil 14. In addition, it is fixed to the surface (insulation coating region) of the upright portion 201 (or upright portion 202). The interphase insulating part 171 insulates between the crossover part 243 and the upright part 201 (or upright part 202). The other interphase insulating portion 172 is bent so as to be disposed between the transition portion 253 of the coil end 25 of the inner coil 15 and the rising portion 211 (or the rising portion 212) of the coil end 21 of the outer coil 14. In addition, it is fixed to the surface (insulation coating region) of the upright portion 211 (or upright portion 212). The interphase insulating part 172 insulates between the crossover part 253 and the upright part 211 (or upright part 212).

  A slot insulating sheet 26 is fixed to the peripheral surfaces 221 and 231 (insulation coating regions) of the insertion portions 22 and 23 of the inner coil 15 using an adhesive. The insulating sheet 17 that covers the peripheral surfaces 221 and 231 is formed of insulating paper having electrical insulating properties. The slot insulating sheet 26 is bent so as to surround the insertion portions 22 and 23 to insulate the insertion portions 22 and 23 from the slots 121 of the stator core 12. The insulating sheet 26 also has a role of insulating between phases near one end and the other end.

  The insulation coating region is a surface region of the coils 14 and 15 for performing insulation between the coils 14 and 15 and the stator core 12 or between a pair of coils (between the outer coil 14 and the inner coil 15 in this embodiment). As in the surface area of the coils 14 and 15 for performing insulation), the coil is in contact with the other member, or is a portion that may be in contact with it.

  FIG. 9 shows a wiring diagram of the outer coil 14 and the inner coil 15. The U-phase insertion portions 18U and 19U of the pair of outer coils 14 connected to the U-phase terminal 101 of the inverter 100 are passed through a group of slots 121Uo. The V-phase insertion portions 18V and 19V of the pair of outer coils 14 connected to the V-phase terminal 102 of the inverter 100 are passed through a group of slots 121Vo. W-phase insertion portions 18W and 19W of the pair of outer coils 14 connected to the W-phase terminal 103 of the inverter 100 are passed through a group of slots 121Wo.

  The U-phase insertion portions 22U and 23U of the pair of inner coils 15 connected to the U-phase terminal 101 of the inverter 100 are passed through a group of slots 121Ui. The V-phase insertion portions 22V and 23V of the pair of inner coils 15 connected to the V-phase terminal 102 of the inverter 100 are passed through the group of slots 121Vi. The W-phase insertion portions 22W and 23W of the pair of inner coils 15 connected to the W-phase terminal 103 of the inverter 100 are passed through a group of slots 121Wi.

  The symbol N1 is a neutral point where the ends of the coil wires 141, 142, 151 of the outer coil 14 and the inner coil 15 are connected, and the symbol N2 is the coil wires 143, 144, 152 of the outer coil 14 and the inner coil 15. It is a neutral point that connects the ends.

  The rotating electrical machine M of the present embodiment is a rotating electrical machine having 3 phases and 8 poles and 24 slots. The rotor 16 rotates by energizing the outer coil 14 and the inner coil 15 via the inverter 100.

Next, a procedure for assembling the outer coil 14 and the inner coil 15 to the stator core 12 will be described.
The insulating sheet 17 is formed in a predetermined outer shape in advance as shown in FIG. 6A, and the slot insulating sheet 26 is formed in a predetermined outer shape in advance as shown in FIG. 6B. . This forming process is an insulating sheet forming process in which the insulating sheets 17 and 26 are formed in an outer shape corresponding to the insulating coating regions of the coils 14 and 15.

The outer coil 14 is shaped in advance in a predetermined shape as shown in FIG. 5A, and the inner coil 15 is shaped in advance in a predetermined shape as shown in FIG. 5C.
Next, as shown in FIG. 5B, the insulating sheet 17 is bent so as to surround the insertion portions 18 and 19, and is fixed to the insertion portions 18 and 19 using an adhesive. In this fastening process, an insulating sheet 17 (first insulating sheet) formed in advance in an outer shape corresponding to the insulating coating region of the outer coil 14 so as to cover the insulating coating region of the outer coil 14 is applied to the outer coil 14. It is the 1st mounting process to mount. FIG. 6A shows a flat sheet-shaped insulating sheet 17A and the insulating sheet 17 in a state in which the flat sheet-shaped insulating sheet 17A is bent.

  Further, as shown in FIG. 5D, the slot insulating sheet 26 is bent so as to surround the insertion portions 22 and 23 and is fixed to the insertion portions 22 and 23 using an adhesive. In this fastening step, a slot insulating sheet 26 (second insulating sheet) formed in advance in an outer shape corresponding to the insulating coating region of the inner coil 15 so as to cover the insulating coating region of the inner coil 15 is used as the inner coil. It is the 2nd mounting process with which it mounts. FIG. 6B shows a flat sheet-shaped slot insulating sheet 26A and the slot insulating sheet 26 in a state where the flat sheet-shaped slot insulating sheet 26A is bent.

  Next, as shown in FIG. 7A, the outer coil 14 to which the insulating sheet 17 is fixed is assembled to the stator core 12. This assembling step is a first assembling step for incorporating the outer coil 14 to which the insulating sheet 17 (first insulating sheet) is fixed into the slot 121. After the outer coil 14 is assembled to the stator core 12, the teeth 13 </ b> B are attached to the inner periphery of the stator core 12 as shown in FIG. 7B. The teeth 13B are inserted in the axial direction and fitted to the inner periphery of the stator core 12. The fitting portion between the teeth 13 </ b> B and the stator core 12 has a shape that prevents the teeth 13 </ b> B from coming off in the radial direction of the stator core 12.

  Next, as shown in FIG. 8A, the inner coil 15 to which the slot insulating sheet 26 is fixed is assembled to the stator core 12. In this assembling step, the crossing portions 243 and 253 of the coil ends 24 and 25 of the inner coil 15 are arranged so as to straddle the standing portions 201, 202, 211 and 212 of the coil ends 20 and 21 of the pair of outer coils 14 adjacent to each other. This is a second assembling step for assembling the inner coil 15 to which the insulating sheet 26 (second insulating sheet) is fixed into the slot 121. After the inner coil 15 is assembled to the stator core 12, the teeth 13 </ b> C are attached to the inner periphery of the stator core 12 as shown in FIG. The teeth 13 </ b> C are inserted in the axial direction and fitted to the inner periphery of the stator core 12. The fitting portion between the teeth 13 </ b> C and the stator core 12 has a shape that prevents the teeth 13 </ b> C from coming off in the radial direction of the stator core 12.

In the first embodiment, the following effects can be obtained.
(1) The outer coil 14 is shaped into a predetermined shape in advance, and is formed by bending the planar sheet-shaped insulating sheet 17A before assembling the outer coil 14 shaped into the predetermined shape to the stator core 12. 17 is fixed to the outer coil 14 so as to cover the insulating coating region of the outer coil 14. Similarly, the inner coil 15 is preliminarily shaped into a predetermined shape, and the slot formed by bending the flat sheet-shaped slot insulating sheet 26A before the inner coil 15 shaped into the predetermined shape is assembled to the stator core 12. The insulating sheet 26 is fixed to the inner coil 15 so as to cover the insulating coating region of the inner coil 15. Since the insulating sheet is not wound before the outer coil 14 is shaped into a predetermined shape, the insulating sheet 17 is not displaced from the outer coil 14 or the insulating sheet 17 is not damaged. In addition, since the outer coil 14 is not deformed during the assembly to the stator core 12 and the coil ends 20 and 21 are not shaped after the outer coil 14 is assembled to the stator core 12, the insulating sheet 17 is not The coil 14 is not displaced and the insulating sheet 17 is not damaged. Similarly, since the insulating sheet is not wound before the inner coil 15 is shaped into a predetermined shape, the insulating sheet 26 is not displaced from the inner coil 15 or the insulating sheet 26 is not damaged. . Further, since the inner coil 15 is not deformed during the assembly to the stator core 12 or the coil ends 24 and 25 are not shaped after the inner coil 15 is assembled to the stator core 12, the slot insulating sheet 26 is There is no displacement with respect to the inner coil 15 or the slot insulation sheet 26 is not damaged.

  (2) The insulating sheet 17 provided with the interphase insulating portions 171 and 172 and the slot insulating portion 173 serves as both the slot insulating sheet and the interphase insulating sheet. The number of parts can be reduced.

  (3) In the configuration in which the coil incorporated in the slot 121 is wound with insulating tape, since the overlap of the tape itself is large, the volume ratio (space factor) occupied by the tape in the slot 121 increases, and the coil 121 The occupancy rate at is reduced. This results in a decrease in energy efficiency of the rotating electrical machine.

  The insulating sheet 17 is wider than the insulating tape, and the overall area of the overlap when wound around the coils 14 and 15 is smaller than that of the insulating tape. That is, in this embodiment, the overlap of the insulation sheet 17 itself and the overlap of the slot insulation sheet 26 itself are very small compared to the overlap of the insulation tape itself. Therefore, the volume ratio (space factor) occupied by the insulating sheet 17 and the slot insulating sheet 26 in the slot 121 is smaller than that of tape winding. That is, the use of the insulating sheet 17 and the slot insulating sheet 26 formed by bending the planar sheet-shaped insulating sheet 17A and the slot insulating sheet 26A improves the space factor in the slots 121 of the outer coil 14 and the inner coil 15. Contribute.

  (4) Since an insulating sheet formed in advance in an outer shape corresponding to the insulating coating region is prepared and the insulating sheet is simply wound around the coil, the stator can be easily compared with the case where the insulating tape is wound around the coil. It can be manufactured and is particularly suitable for mass production.

Next, a second embodiment of FIGS. 10 and 11 will be described. The same reference numerals are used for the same components as those in the first embodiment, and detailed description thereof is omitted.
As shown in FIG. 10A, the slot insulating sheet 27 is bent at the insertion portions 18 and 19 of the outer coil 14 so as to cover the insertion portions 18 and 19 and is fastened with an adhesive. As shown in FIG. 10 (b), the slot insulating sheet 26 is bent at the insertion portions 22 and 23 of the inner coil 15 so as to cover the insertion portions 22 and 23, and is fixed using an adhesive. Cuff portions 271 and 272 are bent at the end portion of the slot insulating sheet 27, and cuff portions 261 and 262 are bent at the end portion of the slot insulating sheet 26. The bent tips of the cuff portions 271 and 261 are engaged with one end surface of the stator core 12, and the bent tips of the cuff portions 272 and 262 are engaged with the other end surface of the stator core 12. The cuff portions 271, 272, 261, and 262 that engage with the end face of the stator core 12 prevent the insulation sheets 27 and 26 from shifting in the axis L direction with respect to the stator core 12 in the slot 121.

  As shown in FIG. 10 (b), the interphase insulating sheet 28 is bent at the transition portion 243 of the inner coil 15 so as to cover the inner side of the transition portion 243 (the side facing one end face of the stator core 12). It is fastened using. Similarly, the interphase insulating sheet 28 is bent at the transition portion 253 of the inner coil 15 so as to cover the inner side of the transition portion 243 (the side facing the other end face of the stator core 12) and is fastened with an adhesive. Yes.

  The interphase insulating sheet 28 includes bands 281, 282, 283, and 284. A pair of bands 281, 282 and another pair of bands 283, 284 are connected so as to make one turn of the crossover parts 243, 253.

  As shown in FIG. 11B, the slot insulating sheet 27 is formed by bending a planar sheet-shaped insulating sheet 27A. As shown in FIG. 11 (c), the interphase insulating sheet 28 is formed by bending a flat sheet-shaped interphase insulating sheet 28A.

  As shown in FIG. 11A, the interphase insulating sheet 28 fastened to the transition portion 243 of the inner coil 15 insulates between the transition portion 243 and the upright portions 201 and 202 of the outer coil 14 so that the inner coil The interphase insulating sheet 28 fastened to the 15 transition portions 253 insulates the transition portion 253 and the standing portions 211 and 212 of the outer coil 14.

  In the second embodiment, the same effects as the items (1), (3), and (4) in the first embodiment can be obtained. Further, the bands 281, 282, 283, and 284 wound around the transition portions 243 and 253 of the coil ends 24 and 25 contribute to prevention of the interphase insulating sheet 28 from falling off from the coil ends 24 and 25 of the inner coil 15.

The manufacturing process of the stator 11 in the second embodiment is the same as that in the first embodiment.
In the present invention, the following embodiments are also possible.

  ○ By removing the part protruding from the upper end surface of the outer coil in the interphase insulating part of the insulating sheet shown in FIG. 7A, as shown in FIGS. 12A and 12B, the insulating sheet 17B The interphase insulating portions 171 and 172 may form protrusions 171 a and 172 a that match the shape of the transition portion of the outer coil 14. Thereby, it is possible to insulate only necessary portions.

Further, the position where the fold line 174 of the interphase insulating portions 171 and 172 in the planar sheet-shaped insulating sheet 17 </ b> C may be changed according to the shape of the outer coil 14.
The present invention may be applied to a concentrated winding electric rotating machine.

  ○ For distributed electric machines with distributed windings in which all coils have the same shape, such as inner and outer coils, and where the coil ends are shaped after the coils are installed in the slots. The present invention can also be applied.

The interphase insulating portions 171 and 172 and the slot insulating portion 173 in the first embodiment may be formed separately.
In the second embodiment, the slot insulating sheet 27 and the interphase insulating sheet 28 may be integrally formed.

In the second embodiment, the bands 281, 282, 283, 284 may be eliminated.
○ Insulating paper coated with resin on one side may be wound around a coil and cured by heat. Conventionally, when the insulating paper is cured and fixed by heat, the entire stator has to be heat-treated. However, as in the above embodiment, if the insulating paper is wound around the coil before the coil is inserted into the slot, Just heat the coil.

○ Ordinary insulating paper may be wound around the coil and then hardened with varnish.
○ Insulating paper may be attached with double-sided tape.
○ It is not limited to fixing the insulating paper to the coil so as not to move completely with an adhesive or the like, and the insulating paper may only be wound around the coil.

The insulating sheet is not limited to insulating paper, and may be any sheet that can be formed in advance in an outer shape corresponding to the insulating coating region.
A linear motor such as a linear motor may be used instead of the rotary motor (rotating electric machine).

  11 ... Stator. 12: Stator core. 13A, 13B, 13C ... Teeth. 14: Outer coil. 15 ... Inner coil. 17: An insulating sheet which is a first insulating sheet. 171, 172... Interphase insulating part. 173: Slot insulation. 17A: An insulating sheet having a flat sheet shape. 181, 191, 221, 231... Peripheral surfaces that are insulating coating regions. 20, 21, 24, 25 ... Coil ends. 201, 202, 211, 212... Standing portion that is an insulating coating region. 243,253 ... Crossover part. 26: A slot insulating sheet which is a second insulating sheet. 26A: Slot insulating sheet having a flat sheet shape. 27: A slot insulating sheet which is a first insulating sheet. 27A: Slot insulating sheet having a flat sheet shape. 28: Interphase insulating sheet. 28A: Interphase insulating sheet in the form of a flat sheet. 281,282,283,284 ... Bands. M: A rotating electric machine that is an electric motor.

Claims (8)

In an electric machine in which a plurality of teeth are arranged on a stator core, a plurality of coils after being shaped into an annular shape are incorporated in slots between the plurality of teeth, and an insulating sheet that covers the plurality of coils is provided In the stator,
The insulating sheet is formed in advance in an outer shape corresponding to the insulating coating region of the coil,
The insulating sheet is attached to the coil so as to cover the insulating coating region of the coil ,
The insulating sheet integrally includes both an interphase insulating portion for insulating between phases and a slot insulating portion for insulating between the coil and the stator core in the slot,
The electric machine is a rotating electric machine having an annular stator core,
The coil includes an outer coil and an inner coil that are alternately arranged in a circumferential direction of the annular stator core, and a coil end of the outer coil is more than a coil end of the inner coil in a radial direction of the annular stator core. A transition portion disposed on the outer side, and an upright portion extending inward in the radial direction of the stator core from both end portions of the transition portion, and a coil end of the inner coil includes a pair of adjacent outer coils The insulating sheet is mounted on the outer coil, and the interphase insulating part includes a connecting part of the coil end of the inner coil and a coil end of the outer coil. The stator in the electric machine interposed between the upright part of the . In an electric machine in which a plurality of teeth are arranged on a stator core, a plurality of coils after being shaped into an annular shape are incorporated in slots between the plurality of teeth, and an insulating sheet that covers the plurality of coils is provided In the stator,
The insulating sheet is formed in advance in an outer shape corresponding to the insulating coating region of the coil,
The insulating sheet is attached to the coil so as to cover the insulating coating region of the coil,
The electric machine is a rotating electric machine having an annular stator core,
The coil includes an outer coil and an inner coil that are alternately arranged in a circumferential direction of the annular stator core, and a coil end of the outer coil is more than a coil end of the inner coil in a radial direction of the annular stator core. A transition portion disposed on the outer side, and an upright portion extending inward in the radial direction of the stator core from both end portions of the transition portion, and a coil end of the inner coil includes a pair of adjacent outer coils A crossing portion straddling the standing portion of the coil end is provided, and the insulating sheet is attached to the inner coil, and the insulating sheet is provided inside the coil end crossing portion of the inner coil and the coil of the outer coil. the stator in intervening to have that electric between the standing part of the end. The insulating sheet, the insulating coating area was coated and claim 1 or claim by performing at least one of the preformed planar sheet bent or curved to the outer shape corresponding to the insulating coating region of the coil Item 3. A stator in an electric machine according to Item 2 . The stator in an electric machine according to any one of claims 1 to 3 , wherein the electric machine is a distributed winding electric motor in which the coil is distributedly wound. The insulating covering region, the peripheral surface of the insertion portion of the coil which is inserted into the slot, or to any one of claims 1 to 4 is at least one of the coil end surface of the coil The stator in the electric machine described. Claims 1 to wherein the inner coil after the crossover portion is formed on the outer coil and the coil end after the crossover portion and the upstanding portion is formed on the coil end is incorporated into the stator core The stator in the electric machine according to any one of 5 . The stator in an electric machine according to any one of claims 1 to 5 , wherein the insulating sheet includes a band wound around a transition portion of the coil end. In an electric machine in which a plurality of teeth are arranged on a stator core, a plurality of coils after being shaped into an annular shape are incorporated in slots between the plurality of teeth, and an insulating sheet that covers the plurality of coils is provided In the stator manufacturing method,
An insulating sheet forming step of forming the insulating sheet into an outer shape corresponding to an insulating coating region of the coil;
A mounting step of mounting the insulating sheet on the insulating coating region of the coil;
Incorporating the coil with the insulating sheet into the slot, and
The stator core is formed in an annular shape,
The coil includes an outer coil and an inner coil that are alternately arranged in a circumferential direction of the annular stator core, and the insulating sheet is disposed between phases between the coil end of the outer coil and the coil end of the inner coil. Interphase insulation sheet for insulation, first insulation sheet for insulation between the outer coil and the stator core in the slot, and insulation between the inner coil and the stator core in the slot A second insulating sheet for performing,
In the mounting step, the first insulating sheet and the interphase insulating sheet, which are previously formed in an outer shape corresponding to the insulating coating region, are mounted on the outer coil so as to cover the insulating coating region of the outer coil. A first mounting step, and a second mounting step of mounting the second insulating sheet previously formed in an outer shape corresponding to the insulating coating region on the inner coil so as to cover the insulating coating region of the inner coil. And
In the assembling step, a first assembling step for assembling the outer coil with the first insulating sheet and the interphase insulating sheet fixed to the slot, and after the first assembling step, a transition portion of the coil end of the inner coil is provided. A second assembling step of incorporating the inner coil with the second insulating sheet fixed into the slot so as to straddle at least a part of the coil ends of a pair of adjacent outer coils,
The said 1st insulating sheet is a stator manufacturing method in the electric machine interposed between the transition part of the coil end of the said inner coil, and at least said part of the coil end of the said outer coil .

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