JP2009177878A - Interphase insulating sheet in rotary electric machine, electric compressor, and method of manufacuturing interphase insulating sheet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent the twisting of bridges caused by insertion of a winding into slots. <P>SOLUTION: A first insulating part 32 is interposed between the first coil end of U-phase windings projecting from the slots 24 and the first coil end 251V of V-phase windigngs 25V projecting from the slots 24. A second insulating part 34 is interposed between the second coil end of U-phase windings projecting from the slots 24 and the second coil end 252V of V-phase windings 25V projecting from the slots 24. The first insulating part 32 and the second insulating part 34 are connected with the bridges 36. The bridges 36 are provided with thermally cured regions S1, S2. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an interphase insulating sheet, an electric compressor, and a method for manufacturing an interphase insulating sheet in a rotating electrical machine.

As an interphase insulating sheet (interphase insulating paper) interposed between phases of coil ends of windings, for example, there is one disclosed in Patent Document 1. The interphase insulating sheet disclosed in Patent Document 1 is composed of a pair of annular insulating papers (insulating portions) that perform interphase insulation of coil end portions, and a coupling piece (bridge) that is inserted into a slot of a stator. Yes.
Japanese Utility Model Publication No. 2-129155 JP 2005-80356 A

  A winding wound around the stator is inserted into the slot using an inserter as disclosed in Patent Document 2, for example. As the winding is inserted into the slot, a force that twists the coupling piece in the circumferential direction of the inner peripheral wall surface of the slot may occur. However, since the end of the coupling piece on the insertion end side of the slot is pressed against the inner peripheral wall surface of the slot by the winding wire inserted into the slot, the end of the coupling piece on the insertion end side of the slot is It does not move in the circumferential direction of the inner wall surface. Since the width of the coupling piece is reduced as much as possible in order to increase the space factor of the winding in the slot, the coupling piece is easily twisted. Therefore, when the winding is inserted into the slot, the coupling piece is twisted so that the end of the coupling piece on the side opposite to the insertion end of the slot moves in the circumferential direction of the inner peripheral wall surface of the slot. There is.

  When such a twist occurs in the coupling piece, the coupling piece may protrude from the opening of the slot or the coupling piece may be cut off. If the coupling piece protrudes from the opening portion of the slot, there is a possibility that the inconvenience that the protruding portion of the coupling piece comes into contact with the rotor rotating inside the annular stator. When the bonded piece is cut, the cut broken piece comes into contact with the rotor, or when a part of the bonded piece is cut and separated, the separated broken piece becomes a foreign matter. A compressor includes an electric compressor that compresses and discharges refrigerant in a compression chamber by a compression operation of a compression operation body based on rotation of a rotary shaft driven by a rotary electric machine. In the type of electric compressor that circulates, the foreign matter may reduce the compression performance of the compressor.

  An object of the present invention is to suppress twisting of a bridge due to insertion of a winding into a slot.

  According to the first to fourth aspects of the present invention, the winding method applied to the slots between the teeth arranged on the inner periphery of the annular stator in the rotating electric machine is wave winding, and the winding is , Inserted from one end of the slot, an annular first insulating portion is interposed between phases of the first coil end of the winding, and an annular second insulating portion is interposed between phases of the second coil end of the winding. And one end of a bridge inserted into the slot is connected to the first insulating portion, and the other end of the bridge is connected to the second insulating portion, There is a plurality, and the first insulating portion, the second insulating portion, and the bridge are for interphase insulating sheets in a rotating electrical machine that are integrally formed. At least one bullet At least a portion of the entire range in the longitudinal direction of the bridge is thermally cured.

  Thermally cured means cured by being heated. The configuration in which the first insulating portion, the second insulating portion, and the bridge are integrally formed is suitable for increasing the space factor of the winding in the slot by reducing the thickness of the entire interphase insulating sheet, but the thickness is small. The bridge is easily twisted. The thermally cured bridge is not easily twisted even when subjected to a twisting force due to the insertion of the winding into the slot. Since the insulating portion is annular, if only a part of the entire bridge is difficult to twist, the other bridges are also difficult to twist.

In a preferred example, a plurality of the thermally hardened regions in the length direction of the bridge are provided apart from each other.
Even a bridge in which a thermally hardened region is provided in a flying manner, it is difficult to twist even if it receives a torsional force due to insertion of a winding into a slot.

In a preferred example, the cured region is provided in all of the plurality of bridges.
A configuration in which all bridges are provided with a thermally hardened region is preferable in order to make all the bridges difficult to twist.

In a preferred example, the thermal curing is ultrasonic curing.
According to a fifth aspect of the present invention, in the electric compressor that compresses and discharges the gas in the compression chamber by the compression operation of the compression operation body based on the rotation of the rotating shaft driven by the rotating electric machine, the rotating electric machine rotates the rotating shaft. The rotary electric machine provided with the phase insulation sheet of any one of Claim 1 thru | or 4 was used.

  In an electric compressor, there is a strict demand for reducing the physique as well as reducing noise and vibration. The rotating electrical machine of the present invention in which the winding is wave winding is suitable for these requirements. Further, since breakage due to torsion of the bridge is prevented, a situation in which the performance of the electric compressor is not deteriorated due to the broken piece of the bridge does not occur.

  According to a sixth aspect of the present invention, there is provided a first insulating portion interposed between phases of a first coil end of a winding wound in a slot between a plurality of teeth arranged on an inner periphery of an annular stator, A second insulating portion interposed between phases of the second coil ends of the winding; and a bridge that connects the first insulating portion and the second insulating portion and is inserted into the slot. The insulating part, the second insulating part, and the bridge are intended for a method of manufacturing an interphase insulating sheet that is integrally formed, and the bridge is sandwiched between an ultrasonic curing base and an ultrasonic horn, The bridge is thermally cured with ultrasound.

  A method of sandwiching the bridge and applying ultrasonic waves is simple in thermally curing the bridge.

  The present invention has an excellent effect that the twisting of the bridge due to the insertion of the winding into the slot can be suppressed.

Hereinafter, a first embodiment in which the present invention is embodied in an electric compressor will be described with reference to FIGS.
An electric compressor 10 shown in FIG. 1A is a scroll type electric compressor. The rotor 11 that constitutes the rotating electrical machine M is fixed to the rotating shaft 12, and the stator 13 that constitutes the rotating electrical machine M is fitted and fixed to the inner peripheral surface of the motor housing 14. The movable scroll 15 as a compression operation body constituting the electric compressor 10 is turned by the rotation of the rotary shaft 12 constituting the rotary electric machine M, and the volume of the compression chamber 17 between the movable scroll 15 and the fixed scroll 16 is reduced. .

  An introduction port 301 is provided on the end wall 30 of the motor housing 14. The introduction port 301 is connected to an external refrigerant circuit (not shown), and refrigerant (gas) is introduced from the external refrigerant circuit into the motor housing 14 via the introduction port 301. Refrigerant introduced into the motor housing 14 passes through the passage 141 between the inner peripheral surface of the motor housing 14 and the outer peripheral surface of the stator 13 (see FIG. 2A and FIG. 3 (a)] and the suction port 18 is sucked into the compression chamber 17. The refrigerant in the compression chamber 17 is compressed by the turning (discharging operation) of the movable scroll 15, and the discharge valve 20 is pushed away from the discharge port 19 and discharged to the discharge chamber 21. The refrigerant in the discharge chamber 21 flows out to the external refrigerant circuit and returns to the motor housing 14.

  As shown in FIGS. 2A and 3A, the stator 13 constituting the rotating electrical machine M includes an annular stator core 22 and slots 24U between teeth 23 arranged in a plurality on the inner periphery of the stator core 22. It consists of windings 25 applied to 24V and 24W. In the present embodiment, the number of teeth 23 and slots 24U, 24V, 24W is eighteen. The slots 24U, 24V, and 24W are arranged at an equal pitch in the circumferential direction of the annular stator 13. Hereinafter, the slots 24U, 24V, and 24W may be simply referred to as the slot 24 (see FIG. 1A).

  As shown in FIG. 1A, the stator core 22 is formed by laminating a plurality of core plates 26 made of a magnetic material (steel plate). The rotor 11 constituting the rotating electrical machine M includes a rotor core 27 and a plurality of permanent magnets 28 embedded in the rotor core 27. The rotor core 27 is configured by laminating a plurality of core plates 29 made of a magnetic material (steel plate). A shaft hole 271 is provided in the center of the rotor core 27, and the rotary shaft 12 is passed through the shaft hole 271 and fixed.

  As shown in FIG. 2B, a first in-slot insulating sheet 40 made of synthetic resin is interposed between the inner peripheral wall surface 31 forming the slot 24V and the winding 25V in the slot 24V. The first in-slot insulating sheet 40 is curved in a U shape along the inner peripheral wall surface 31. Also, a second in-slot insulating sheet 41 made of synthetic resin is interposed between the first in-slot insulating sheet 40 and the winding 25V so as to cover the winding 25V at the opening 241 of the slot 24V. .

  As shown in FIG. 3B, a first in-slot insulating sheet 40 made of synthetic resin is interposed between the inner peripheral wall surface 31 forming the slot 24W and the winding 25W in the slot 24W. Further, a second in-slot insulating sheet 41 made of synthetic resin is interposed between the first in-slot insulating sheet 40 and the winding 25W so as to cover the winding 25W at the opening 241 of the slot 24W. .

  As shown in FIG. 2A and FIG. 3A, the same first in-slot insulating sheet 40 and second in-slot insulating sheet 41 are also provided in the other slots 24U. The windings 25 in the slots 24U, 24V, and 24W are separated from the inner peripheral wall surfaces 31 of the slots 24U, 24V, and 24W by the first in-slot insulating sheet 40 and the second in-slot insulating sheet 41.

  As shown in FIG. 4, one end 401 of the first in-slot insulating sheet 40 is folded back toward the one end surface 221 of the stator core 22, and the other end 402 is the other end surface 222 of the stator core 22. It is folded to the side. The tip of the end 401 is in contact with the end surface 221, and the tip of the end 402 is in contact with the end surface 222. The folded back end portions 401 and 402 prevent the first in-slot insulating sheet 40 from being detached from the slots 24U, 24V, and 24W. In addition, illustration of a winding is abbreviate | omitted in FIG.

  FIG. 6 is a schematic view of the stator 13 as viewed from the front side (the left side is the front side and the right side is the rear side in FIG. 1A). The winding 25 applied to the slots 24U, 24V, and 24W is wound by wave winding.

  Winding 25U (hereinafter referred to as U-phase winding 25U) is passed through a group of slots 24U. Winding 25V (hereinafter referred to as V-phase winding 25V) is passed through the group of slots 24V, and winding 25W (hereinafter referred to as W-phase winding 25W) is passed through the group of slots 24W. Has been. The solid line portion of each phase winding 25U, 25V, 25W is a portion wired to the end face of the stator core 22 in front of the stator 13 (front side), and the broken line portion of each phase winding 25U, 25V, 25W is This is a portion wired on the end face of the stator core 22 on the other side (rear side) of the stator 13. The connecting portion between the solid line portion and the broken line portion of each phase winding 25U, 25V, 25W is a portion passing through the slots 24U, 24V, 24W.

  Between the first coil end 251U of the U-phase winding 25U protruding from the slot 24U on the front side of the stator 13 and the first coil end 251V of the V-phase winding 25V protruding from the slot 24V on the front side of the stator 13. The first insulating part 32 is interposed so as to go around the rotor 11. Between the first coil end 251V of the V-phase winding 25V protruding from the slot 24V on the front side of the stator 13 and the first coil end 251W of the W-phase winding 25W protruding from the slot 24W on the front side of the stator 13. The first insulating portion 33 is interposed so as to go around the rotor 11. The annular first insulating portion 32 and the annular first insulating portion 33 are both made of synthetic resin and formed in a band shape. Both ends of the band-shaped first insulating portion 32 and the first insulating portion 33 are joined and heat-welded.

  FIG. 7 is a schematic view of the rear side of the stator 13. The solid line portions of the phase windings 25U, 25V, and 25W are portions wired on the end face of the stator core 22 on the rear side of the stator 13, and the broken line portions of the phase windings 25U, 25V, and 25W are the stator 13 portions. This is a portion wired on the end face of the stator core 22 on the front side.

  Between the second coil end 252U of the U-phase winding 25U protruding from the slot 24U on the rear side of the stator 13 and the second coil end 252V of the V-phase winding 25V protruding from the slot 24V on the rear side of the stator 13. The second insulating portion 34 is interposed so as to go around the rotor 11. Between the second coil end 252V of the V-phase winding 25V protruding from the slot 24V on the rear side of the stator 13 and the second coil end 252W of the W-phase winding 25W protruding from the slot 24W on the rear side of the stator 13. The second insulating portion 35 is interposed so as to go around the rotor 11. The annular second insulating portion 34 is located on the outer peripheral side of the annular second insulating portion 35, and the inner peripheral second insulating portion 35 is surrounded by the outer peripheral second insulating portion 34. The second insulating part 34 and the second insulating part 35 are both made of synthetic resin and formed in a band shape. Both end portions of the band-shaped second insulating portion 34 and the second insulating portion 35 are joined and heat-welded.

  As shown in FIG. 1B, the first insulating part 32 and the second insulating part 34 are coupled by a plurality of bridges 36 (six in this embodiment). One end 361 of the bridge 36 is connected to the first insulating portion 32, and the other end 362 of the bridge 36 is connected to the second insulating portion 34. The first insulating portion 32, the second insulating portion 34, and the plurality of bridges 36 are integrally formed. As shown in FIGS. 2A and 3A, the bridge 36 is inserted into a slot 24V into which the V-phase winding 25V is inserted. The first insulating portion 32, the second insulating portion 34, and the bridge 36 constitute a first interphase insulating sheet 37 that insulates the phases of the coil ends of the winding 25.

  The first insulating portion 33 and the second insulating portion 35 are coupled by a plurality of bridges 38 (six in this embodiment as shown in FIGS. 2A and 3A). As shown in FIG. 4, one end 381 of the bridge 38 is connected to the first insulating part 33, and the other end 382 of the bridge 38 is connected to the second insulating part 35. The first insulating portion 33, the second insulating portion 35, and the plurality of bridges 38 are integrally formed. Bridge 38 is inserted into slot 24W into which W-phase winding 25W is inserted. The first insulating portion 33, the second insulating portion 35, and the bridge 38 constitute a second interphase insulating sheet 39 that insulates the phases of the coil ends of the winding 25.

  The configuration of the second interphase insulating sheet 39 and the configuration of the first interphase insulating sheet 37 are the same. The first interphase insulating sheet 37 and the second interphase insulating sheet 39 are made of synthetic resin (for example, polyethylene naphthalate or polyethylene terephthalate). ). Only the first interphase insulating sheet 37 will be described below.

  Regions S1 and S2 indicated by meshes in FIG. 1B and FIG. 4 indicate regions in which the bridges 36 of the first interphase insulating sheet 37 are thermally cured. The curing region S1 and the curing region S2 are provided apart from each other in the length direction of the bridge 36, and the total length of the curing regions S1 and S2 in the length direction of the bridge 36 is larger than the total length of the bridge 36. large. The widths of the curing region S1 and the curing region S2 are the same as the width of the bridge 36, and the lengths of the curing region S1 and the curing region S2 are larger than the widths of the curing region S1 and the curing region S2.

  5A, 5B, and 5C show an apparatus for thermally curing the bridge 36. FIG. Reference numeral 42 denotes an iron-based ultrasonic hardening base. 43 is a first ultrasonic horn constituting the ultrasonic device, and 44 is a second ultrasonic horn constituting the ultrasonic device. The first ultrasonic horn 43 and the second ultrasonic horn 44 are moved up and down integrally. The lower surface of the first ultrasonic horn 43 is a plane parallel to the upper surface of the ultrasonic curing base 42, and the lower surface of the second ultrasonic horn 44 is a plane parallel to the upper surface of the ultrasonic curing base 42.

  Next, a method for providing the hardened regions S1 and S2 in the bridge 36 will be described. As shown in FIG. 5A, the first interphase insulating sheet 37 is placed on the ultrasonic curing base 42. Next, the first ultrasonic horn 43 and the second ultrasonic horn 44 are moved downward, and the first ultrasonic horn 43 and the second ultrasonic horn 44 are pushed onto the bridge 36 as shown in FIG. Touched. The bridge 36 is sandwiched and joined between the upper surface of the ultrasonic curing base 42 and the lower surface 431 of the first ultrasonic horn 43, and the upper surface of the ultrasonic curing base 42 and the lower surface 441 of the second ultrasonic horn 44. It is sandwiched between and joined.

  Next, the ultrasonic device is activated, and the area S1 corresponding to the lower surface 431 of the first ultrasonic horn 43 is heated by ultrasonic waves as shown in FIG. A region S2 corresponding to 441 is heated by ultrasonic waves. Thereby, the regions S1 and S2 are thermally cured. The other bridges 36 and the bridges 38 of the second interphase insulating sheet 39 are similarly thermally cured.

  8A and 8B show a state in which a winding (in the example shown, U-phase winding 25U) is inserted into a slot using an inserter (not shown). In this embodiment, as shown in FIG. 8A, the U-phase winding 25U is inserted from one end 242 of the slot 24U (hereinafter referred to as the insertion end 242). FIG. 8B shows a state in which the U-phase winding 25U is inserted into the slot 24U.

  After the U-phase winding 25U is inserted into the slot 24U, the bridge 36 having the cured regions S1 and S2 of the first interphase insulating sheet 37 is inserted into the slot 24V, and then the V-phase winding is inserted using the inserter. It is inserted into the slot 24V from the insertion end 242 side. After the V-phase winding is inserted into the slot 24V, the bridge 38 having the hardened region of the second interphase insulating sheet 39 is inserted into the slot 24W, and then the W-phase winding is inserted into the insertion end 242 side using the inserter. To the slot 24W.

In the first embodiment, the following effects can be obtained.
(1) On the insertion end 242 side of the slot 24 into which the winding 25 is inserted, the first slot 361 is inserted into the first slot by the V-phase winding 25V into which one end 361 of the bridge 36 (see FIGS. 1B and 4) is inserted. It is pressed against the inner insulating sheet 40. Therefore, the one end 361 side of the bridge 36 does not move in the circumferential direction of the slot 24. Further, the bridge 36 having the hardened regions S1 and S2 is less likely to be twisted around its length direction than a bridge having no hardened regions S1 and S2. Therefore, even if the bridge 36 receives a force for rotating in the circumferential direction of the inner peripheral wall surface 31 by inserting the V-phase winding 25V into the V-phase slot 24V, the other end of the bridge 36 having the hardened regions S1 and S2. It can suppress that 362 [refer FIG.1 (b) and FIG.4] moves to the circumferential direction of the inner peripheral wall surface 31. FIG. That is, the bridge 36 is not easily twisted even if it receives a twisting force due to the insertion of the V-phase winding 25V into the V-phase slot 24V.

  (2) The first interphase insulating sheet 37 is formed by integrally forming the first insulating portion 32, the second insulating portion 34, and the bridge 36, and the second interphase insulating sheet 39 includes the first insulating portion 33 and the first insulating portion 33. The second insulating portion 35 and the bridge 38 are integrally formed. Such a configuration is suitable for reducing the overall thickness of the interphase insulating sheets 37 and 39 and increasing the space factor of the winding in the slot 24, but a bridge having a small thickness is easily twisted. The bridges 36 and 38 of the first interphase insulating sheet 37 and the second interphase insulating sheet 39 that are integrally formed are particularly suitable as an application target of the present invention.

(3) Thermal curing with ultrasonic waves is simple as a means for thermally curing the bridges 36 and 38.
(4) A method of sandwiching the bridges 36 and 38 between the ultrasonic curing base 42 and the ultrasonic horns 43 and 44 and applying ultrasonic waves is simple in thermally curing the bridges 36 and 38.

  (5) The case where all of the bridges 36 are difficult to twist individually, compared to the case where only a part of all the bridges 36 (six in this embodiment) of the first interphase insulating sheet 37 are difficult to twist. This is advantageous in suppressing twisting of the bridge 36. The configuration in which the hardened regions S1 and S2 are provided in all the bridges 36 of the first interphase insulating sheet 37 is preferable for making all the bridges 36 difficult to twist. The same can be said for the second interphase insulating sheet 39.

  (6) The wave-winding rotary electric machine M excellent in low pulsation (low vibration) is suitable for application to the electric compressor 10. That is, in the electric compressor 10, there is a strict requirement for reducing noise and vibration, and also for reducing the physique, but the wave-winding rotating electrical machine M is suitable for these requirements. The electric compressor 10 using the wave-winding rotating electric machine M is particularly suitable as an in-vehicle electric compressor having particularly severe requirements.

  (7) When the broken pieces are separated from the bridges 36 and 38, the broken pieces may enter the compression chamber 17 together with the refrigerant circulating in the motor housing 14, and the compression performance of the electric compressor 10 may be reduced. Alternatively, if the bridges 36 and 38 jump out of the opening 241 of the slot 24 due to the twisting of the bridges 36 and 38, the bridges 36 and 38 may come into contact with the peripheral surface of the rotor core 27. When the bridges 36 and 38 come into contact with the peripheral surface of the rotor core 27, the rotational performance of the rotating electrical machine M may be deteriorated.

  In the present embodiment, since the hardened regions S1 and S2 are provided in the bridges 36 and 38 to suppress the twisting, the bridges 36 and 38 are not broken or jumped out from the opening 241 due to the twisting of the bridges 36 and 38. . Therefore, the situation where the compression performance of the electric compressor 10 and the rotation performance of the rotary electric machine M do not occur does not occur.

Next, each embodiment shown in FIGS. 9 and 10 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.
In the second embodiment of FIG. 9, the entire bridge 36 is a hardened region S3. The bridge 36 in which the entire bridge 36 is thermally cured is more difficult to twist than the bridge 36 in the first embodiment in which a part of the bridge 36 is thermally cured.

  In the third embodiment of FIG. 10, the curing region S3 is provided in half of the six bridges 36, and every other bridge 36 having the curing region S3 is disposed. . Since the insulating portions 32 and 34 are annular, if only a part of the entire bridge 36 has the hardened region S3, the bridge 36 without the hardened region S3 is hardly twisted.

In the present invention, the following embodiments are also possible.
In the first embodiment, the number of cured regions in one bridge 36 may be three or more.

In the first embodiment, the total length of the hardened regions in one bridge 36 may be half or less of the total length of the bridge 36.
In the first embodiment, a single ultrasonic horn may be pressed against the bridge 36 to provide the curing region S1, and then the ultrasonic horn may be pressed against the bridge 36 to provide the curing region S2. .

O Both ends of the insulating portions 32 and 34 may be bonded by heat welding using an ultrasonic horn for providing a hardened region on the bridge 36.
A part of the cured region may be in the first insulating part 32 or the second insulating part 34.

-The width | variety of a hardening area | region may be smaller than the width | variety of a bridge | bridging.
The bridge may be thermally cured by a thermal curing means other than ultrasonic curing.
-You may apply this invention to electric compressors (for example, piston type compressors) other than a scroll type compressor. The piston is a compression operation body.

The 1st Embodiment is shown and (a) is the whole sectional side view of an electric compressor. (B) is a perspective view of an interphase insulating sheet. (A) is the sectional view on the AA line of Fig.1 (a). (B) is a partial expanded sectional view. (A) is the BB sectional drawing of Fig.1 (a). (B) is a partial expanded sectional view. FIG. (A), (b), (c) is a sectional side view for demonstrating the method to thermally harden a bridge with an ultrasonic wave. The schematic diagram for demonstrating wave winding. The schematic diagram for demonstrating wave winding. (A), (b) is a perspective view for demonstrating the method of inserting a winding in a slot. The perspective view which shows 2nd Embodiment. The perspective view which shows 3rd Embodiment.

Explanation of symbols

  10: Electric compressor. 12 ... Rotating shaft. 13 ... Stator. 15 ... A movable scroll as a compression operation body. 17 ... Compression chamber. 23 ... Teeth. 24, 24U, 24V, 24W ... slots. 25 ... Winding. 25U ... U phase winding. 25V ... V phase winding. 25W ... W phase winding. 251U, 251V, 251W ... 1st coil end. 252U, 252V, 252W ... 2nd coil end. 32, 33 ... 1st insulation part. 34, 35 ... 2nd insulation part. 36,38 ... Bridge. 361, 362... End portions. 37: First interphase insulating sheet. 39: Second interphase insulating sheet. 42 ... Ultrasonic curing base. 43, 44 ... ultrasonic horn. M: Rotating electric machine. S1, S2, S3 ... Curing region.

Claims (6)

The winding method applied to the slots between the teeth arranged on the inner periphery of the annular stator in the rotating electric machine is wave winding, and the winding is inserted from one end of the slot, and the winding An annular first insulating portion is interposed between phases of the first coil end of the wire, and an annular second insulating portion is interposed between phases of the second coil end of the winding, and is inserted into the slot. One end portion of the bridge is connected to the first insulating portion, the other end portion of the bridge is connected to the second insulating portion, a plurality of the bridges, the first insulating portion and the In the interphase insulating sheet in the rotating electrical machine formed integrally, the second insulating portion and the bridge,
At least one of the plurality of bridges is an interphase insulating sheet in a rotating electrical machine in which at least a part of the entire range in the longitudinal direction of the bridge is thermally cured.   The interphase insulating sheet for a rotating electrical machine according to claim 1, wherein a plurality of the thermally hardened regions in the length direction of the bridge are provided apart from each other.   The interphase insulating sheet in a rotating electrical machine according to claim 1, wherein the hardened region is provided in all of the plurality of bridges.   The interphase insulating sheet in a rotating electrical machine according to any one of claims 1 to 3, wherein the thermal curing is curing by ultrasonic waves. In the electric compressor that compresses and discharges the gas in the compression chamber by the compression operation of the compression operation body based on the rotation of the rotating shaft driven by the rotating electrical machine,
The electric compressor using the rotary electric machine provided with the phase insulation sheet of any one of Claims 1 thru | or 4 as a rotary electric machine which rotates the said rotating shaft. A first insulating portion interposed between phases of a first coil end of a winding wound in a slot between teeth arranged on the inner periphery of an annular stator; and a second coil end of the winding A second insulating part interposed between the first insulating part, a bridge that joins the first insulating part and the second insulating part, and is inserted into the slot, the first insulating part and the second insulating part In the method for manufacturing the interphase insulating sheet, the part and the bridge are integrally formed,
A method for producing an interphase insulating sheet, wherein the bridge is sandwiched between an ultrasonic curing base and an ultrasonic horn, and the bridge is thermally cured with ultrasonic waves in this sandwiched state.

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