JP2010136537A - Rotating electric machine and manufacturing method thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotating electric machine for vehicle which is excellent in productivity and reliability and to provide a manufacturing method thereof. <P>SOLUTION: A stator core 1 of the rotating electric machine for a vehicle includes a winding 2 of single-layer two stage winding. Coils 2a, 2b forming a winding 3 are each molded in a single coil state, subjected to partial resin impregnation and then incorporated into each slot 1s of the stator core 1. With this configuration, coil bending is not required in a state where the coils are attached to the slot 1s of the stator core 1, and the number of windings per coil using single winding is increased to reduce the number of conductor connection points, and reliability can be improved and advantages in manufacturing processes can be obtained. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a rotating electrical machine.

  Rotating electric machines used for electric drive or energy regeneration of vehicles, particularly automobiles, continue to be required to have small and high output. It is essential to reduce the size of rotating electrical machines, particularly to increase the output by shortening the axial dimension of the winding of the stator, improving the space factor of the conductor in the slot, and increasing the reliability of insulation and conductor connection.

  A single-layer two-stage winding method is known for large AC generators (see, for example, Non-Patent Document 1 or Non-Patent Document 2).

  For windings used in the stator of a vehicular generator, a wave winding method using rectangular conductor segments or rectangular hairpin coils has been proposed (see, for example, Patent Document 1).

Japanese Patent No. 3815104 Supervised by Keiichi Hirose, original work by Richter Hara, Electric Machinery, June 10, 1972, reprinted, Corona Inc., p.107-113 Co-authored by Kotaro Takeuchi and Naoyoshi Isobe, The Original Design of Electrical Equipment, December 10, 1972, 1st edition, 2nd edition, Ohm Co., Ltd., p.152-156

  The technology known for large-sized AC generators is a stationary rotating electrical machine, which is not subject to severe dimensional constraints in the axial direction, and can take a large insulation thickness and insulation gap between coils even when the operating voltage is high. . There is a problem that it is difficult to apply this to a vehicle having a large dimensional constraint such as an engine room.

  In addition, in the conventional vehicle generator technology, it is necessary to create a continuous winding by connecting a plurality of conductors serving as coil sides in series, and an increase in the number of conductor connection points cannot be avoided, ensuring reliability. It was not always enough. In addition, it is essential to bend the slot outlet while inserting the conductor that is the coil side into the slot of the stator core, requiring a lot of labor to secure the insulation reliability of the coil, and the manufacturing equipment is complicated. It was expensive.

  An object of the present invention is to provide a rotating electrical machine for a vehicle excellent in productivity and reliability and a method for manufacturing the same.

  The present invention includes a rotor and a stator disposed opposite to the rotor, the torque of which is controlled by a semiconductor power conversion device, and a rotating electrical machine that is mounted on a vehicle and generates driving force or energy regeneration of the vehicle The stator includes a stator core having a plurality of slots in which the number of slots per phase per phase is an integer, and a single-layer coil inserted in each slot having the same polarity and the same phase. The winding coil is composed of a plurality of insulated rectangular cross-section conductor strands, and the short side of the cross-section of the conductor strand is 1 in the depth direction of the slot. The shape of the coil end portion that is stacked and arranged in a row and includes a span portion between the slots extends from the slot, and then bends at a substantially right angle toward the outer diameter side of the stator, and then circumferentially The axial end of the stator core A first coil group extending to form an arc along the outer diameter or inner diameter, and extending substantially linearly from the slot, then bends substantially perpendicular to the circumferential direction, and then the axial end of the stator core A second coil group extending so as to form an arc along the outer diameter or inner diameter of the portion, and at least one of the first coil group and the second coil group is inserted into the slot This is a rotating electrical machine that is pre-shaped into a shape.

  The present invention also includes a rotor and a stator disposed opposite to the rotor, the torque of which is controlled by the semiconductor power converter, and the rotation that is mounted on the vehicle and generates the driving force or regenerates the vehicle. The stator includes a stator core having a plurality of open slots in which the number of slots per phase per pole is an integer, and a single-layer coil inserted in each slot having the same polarity and the same phase. A method of manufacturing a rotating electrical machine having a plurality of concentrically arranged windings, wherein a coil of the winding is composed of a plurality of insulated rectangular cross-section conductor strands, and the short side of the conductor strand cross-section Are stacked in a row in the depth direction of the slot, and the shape of the coil end portion including the span portion between the slots is extended from the slot and then substantially perpendicular to the outer diameter side of the stator. Bend, then turn in the circumferential direction and fix The first coil group is formed so as to form an arc along the outer diameter or inner diameter of the axial end of the core, and the shape of the coil end including the span between the slots is made substantially straight from the slot. After extending, the second coil group is formed so as to bend at a substantially right angle in the circumferential direction and then form an arc along the outer diameter or inner diameter of the axial end of the stator core, and then the first coil This is a method of manufacturing a rotating electrical machine in which a group and a second coil group are inserted into a slot.

  ADVANTAGE OF THE INVENTION According to this invention, the rotary electric machine for vehicles excellent in productivity and reliability and its manufacturing method can be provided.

  Hereinafter, as one embodiment of the present invention, a winding structure of a stator of a motor generator that controls the traction force of a vehicle will be described.

  A rotating electrical machine that constitutes an embodiment of the present invention is a multiphase AC rotating electrical machine that is mounted on an automobile and whose torque is controlled via a semiconductor power converter. A plurality of open slots in which the number of slots for each pole and phase is an integer are formed in the stator core disposed opposite to the rotor via a gap, and a coil wound in a single layer is inserted into each slot. The plurality of coils having the same polarity and the same phase are arranged concentrically to form a chain winding type winding. Each coil is composed of a plurality of insulated rectangular conductor wires, and the short sides of the conductor wire dimensions are stacked and arranged in a row in the slot depth direction.

  Moreover, the schematic shape of the coil end part including the slot span part of the coil wound by single layer is divided into two types as the schematic shape for avoiding the spatial interference between coils. One is a coil group having a shape in which the coil end portion is bent at a substantially right angle from the armature hole toward the outer diameter side and the slots are connected in a circular arc shape in parallel with the side surface of the yoke portion of the stator core. is there. The other is composed of a coil group having an outer diameter dimension generally corresponding to the slot bottom of the stator core and a shape connecting the slots in an arc shape.

  The plurality of coils are preliminarily formed into a size and shape when fitted in a slot of the stator core, and are incorporated into a predetermined slot of the stator core from the armature hole side.

  Accordingly, it is possible to avoid conducting the conductor strand bending process in the stator circumferential direction of the coil end portion in a state where the coil is inserted into the slot. The axial dimension of the coil end of the winding can be shortened, and it is not necessary to bend the conductor wire of the coil end when the coil is inserted into the slot. An AC rotating electrical machine for vehicles with high output and high reliability can be provided.

  Preferably, the coil wound on the single layer is formed into a predetermined shape in advance before assembling into the stator core, and when assembling into the slot from the armature hole side, the part between the slots of the coil is bent to make both sides of the coil into the slot. The coil end portion after being housed and assembled is not required to be bent.

  Preferably, the coil is roughly flattened for forming a coil group in which the portion between the slots is bent from the armature hole toward the outer diameter side and the slots are connected in an arc in parallel with the side surface of the yoke portion of the stator core. A rectangular conductor element wire is wound around a winding form that can produce a coil shape when it is expanded into a shape, and then bending is performed on both sides of the coil except for the straight portions on both sides inserted into the slot. After three-dimensionally forming the part between the coil part, the coil end part, and the slot, and fixing the linear part inserted into the slot with a conductor wire, or attaching the insulator for slot insulation, the stator Install in the iron core.

  Also preferably, the anti-vibration structure is formed by impregnating a resin by closely contacting the coils arranged in different slots at the portion between the slots of a plurality of concentrically arranged coils belonging to the same polarity and in-phase. And

  In addition, it is preferable to specify in advance a location where the inter-phase coil voltage exceeds the dielectric strength of the coil at the part where the heterogeneous coils spatially intersect and close at the coil end part or between the slots, and specify this in the coil alone state. A coil with a reinforcing insulating material added only to the part is incorporated into the stator core.

  Preferably, a magnetic flux that concentrates on the teeth of the stator core is applied to the slot space by applying a soft magnetic material that does not easily flow eddy current to the wedge that is attached to the opening of the open slot and is used for holding the coil. To diffuse.

  As a result, it is possible to provide a rotating electrical machine that has excellent cooling performance by reducing eddy current loss of the conductor in the slot and improving heat transfer from the slot conductor wire to the stator core.

  Moreover, the rigidity of the part between slots can be improved and the vibration resistance of a coil | winding can be improved.

  Further, it is possible to provide a small and highly reliable rotating electrical machine that can easily realize insulation between different phases in the coil end portion and the portion between the slots against the surge voltage generated by the inverter operation.

  Furthermore, the air gap magnetic flux density pulsation due to the open slots of the stator core can be alleviated, and noise caused by electromagnetic vibration and local loss on the rotor surface can be suppressed.

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

  FIG. 1 is a conceptual diagram of a main part of a rotating electrical machine that constitutes an embodiment of the present invention. FIG. 1A shows a sectional view of the axial section, and FIG. 1B shows the shape of the stator core and the coil end portion viewed from the axial direction.

  This rotating electric machine is located at the center of an armature hole 3 enclosed in an annular shape by a stator core 1, a winding 2 incorporated in a slot 1s of the stator core 1, and the stator core 1, and generates a torque. It is composed of four.

  Although the coil 2 has a different coil pitch, the winding 2 is composed of two types of coil groups, a coil (A) 2a and a coil (B) 2b, which can be divided by the shape of the part between the coil end part and the slot 1s. As shown in FIG. 1B, the portion extending between the slots 1s is arranged in a double arc shape so that the coil ends do not interfere with each other spatially.

  FIG. 2 shows a cross-sectional view of the slot portion of FIG.

  The coil is a two-stage single-layer winding formed by stacking insulated rectangular conductor wires 10 in the depth direction of the slot 1s in the short side direction of the rectangular conductors, and the conductor wires 10 are impregnated with resin. A slot insulating paper 11 is disposed between the conductor wire 10 and the stator core 1. The coil is held in the slot by a wedge 12 provided in the opening of the open slot. Preferably, a magnetic material is used for the wedge 12.

  FIG. 3 is an explanatory diagram of the conductor shape of the coil end portion. The coil (a) 2a is bent at a substantially right angle from the armature hole 3 toward the outer diameter side of the stator core 1 through the coil end portion 2a, and is parallel to the yoke portion side surface 1y of the stator core 1. It has the shape which connects between 1s in circular arc shape. That is, the coil (A) extends from the slot 1s, then bends at a substantially right angle toward the outer diameter side of the stator, and then bends in the circumferential direction to the outer diameter or inner diameter of the axial end of the stator core 1. It extends so as to form an arc along.

  The coil (b) 2b has a shape in which the slots 1s are connected in an arc shape with an outer diameter generally corresponding to the bottom of the slot 1s of the stator core 1. After extending from the slot substantially linearly to the height of the coil (A) in the axial direction, it bends substantially perpendicularly to the circumferential direction, and then arcs along the outer or inner diameter of the axial end of the stator core 1. It is stretched to make.

  The span 14 between the slots 1s of the coil group arranged concentrically in different slots 1s of the same polarity and in the same phase is impregnated with the resin in contact with or in close contact with the coils.

  Further, a reinforcing insulation 15 is added to a portion where the different-phase coils spatially intersect and approach each other.

  A plurality of inter-coil connecting wires 13 for constituting the winding can be arranged in a space sandwiched between the coil (A) and the coil (B), and therefore it is necessary for the connection between the coil poles in the axial direction and the radial direction. No additional dedicated space is required.

  FIG. 4 shows a connection diagram between coils constituting a winding in a three-phase, eight-pole, 48-slot, one-series star connection.

  Since the number of slots per phase per pole is 2.0 (integer), the coil group of one pole and one phase has two coils 2a or shapes that are concentrically arranged inside and outside in the shape of coil (A). Is composed of two coils 2b that are concentrically arranged inside and outside in a coil (b) shape.

  Taking the U phase as an example, the coils of slot numbers 1-8 and 2-7 are connected in series, and connected to the series connected coils of slot numbers 13-20 and 14-19 that form the next pole. Subsequently, it is connected to the serially connected coils of slot numbers 25-32 and 26-31, and finally connected to the serially connected coils of slot numbers 37-44 and 38-43. Connected to sex point.

  The V-phase and W-phase coils are arranged in the same manner as the U-phase coil with a phase difference of 120 degrees and 240 degrees in electrical angle from the U-phase coil, and these three phases form a winding.

  In the coils of each phase, the same number of coils (b) and coils (b) are connected to each other, so that the impedance of each phase is balanced.

  Next, the manufacturing process of the coil which comprises a coil | winding is demonstrated with FIG. 5, FIG.

  FIG. 5 is an explanatory view of the manufacturing process of the coil (A). As shown in FIGS. 5 (A) and 5 (B), a rectangular conductor strand 21 insulated around a winding mold 20 capable of creating a coil shape when the coil is developed in a substantially flat plate shape is wound a required number of times in FIG. 5 (C). Make the coil shown. Next, as shown in FIG. 5D, the coil end portion is bent to form the linear portion 22 inserted into the slot and the inter-slot portion 23 three-dimensionally.

  Only the straight portion 22 to be inserted into the next slot is fixed with resin, or a slot insulating insulator 24 is attached to form a single coil.

  FIG. 6 is an explanatory diagram of the manufacturing process of the coil (b).

  As shown in FIGS. 6 (A) and 6 (B), a rectangular coil 31 shown in FIG. 6 (C) is wound by winding a rectangular conductor wire 31 insulated around a winding mold 30 capable of creating a substantially cylindrical coil shape. To manufacture. However, since the length of the conductor wire between the slots of the coil increases as it goes toward the outer side of the stator core, each winding wire has its conductor wire after bending by attaching an inclined portion 40 to the end portion. It is designed so that the length can be adjusted.

  Next, as shown in FIG. 6D, the coil end portion is bent to form the linear portion 32 inserted into the slot and the inter-slot portion 33 three-dimensionally.

  Only the straight portion 32 to be inserted into the next slot is fixed with resin, or a slot insulating insulator 34 is attached to form a single coil.

  After forming the coil (A) and the coil (B) in this way, they are inserted into the slot 1s.

  FIG. 7 shows a block diagram of a vehicle drive system to which the rotating electrical machine of the above embodiment is applied. This vehicle drive system has an internal combustion engine 703, two rotary electric machines 704, and a rotary electric machine 705 as drive sources. The rotary electric machine 704 is provided on the drive shaft of the internal combustion engine 703, and one wheel is connected via a transmission 709. 710 is driven. On the other hand, the rotating electrical machine 705 drives the other wheel via the differential 711. The rotating electrical machine 704 acts as a generator driven by wheels during coasting or downhill.

  Energy conversion between the rotation of the two rotating electric machines and the battery 702 as an energy storage system is performed by inverters 706 and 707 and a DC converter 708 as semiconductor power conversion devices. The control device 701 controls the inverters 706 and 707 and the DC converter 708 based on the state of the battery 702 and other vehicle state information.

  In addition, although the example using two rotary electric machines was shown here, it is not restricted to this, The rotary electric machine of this embodiment is applied to all the vehicles using the rotary electric machine which contributes to drive a vehicle. Is possible.

  FIG. 8 is a circuit diagram of a vehicle drive system to which the rotating electrical machine of the above embodiment is applied. The present embodiment is an example using an IGBT conversion circuit 800 as a semiconductor power conversion device. The IGBT conversion circuit 800 includes a switching semiconductor 801. The IGBT conversion circuit 800 has a function of converting alternating current and direct current between the battery 804 and the rotating electrical machine 802 by controlling ON / OFF of the switching semiconductor 801. Here, although the IGBT is used as the switching semiconductor 801, it goes without saying that other switching semiconductors such as a MOSFET may be used.

  FIG. 9 shows problems peculiar to a vehicle drive motor to which the above embodiment is applied. When the rotating electrical machine is applied as a vehicle drive source such as an automobile, higher speed switching is required. FIG. 9A shows an inverter output terminal voltage waveform of PWM control when used for other applications, and the peak value is a value corresponding to the DC voltage. On the other hand, when a rotating electrical machine is applied for driving a vehicle, as shown in FIG. 9B, a surge voltage is superimposed by high-speed switching, and the peak value becomes larger than the DC voltage.

  The rotating electrical machine applied to the vehicle may be applied with a voltage having a peak value larger than the direct current voltage as described above, and high insulation performance is required. In order to improve the insulation performance, for example, it is effective to secure a creepage distance and a spatial distance between the windings or to reduce a portion having a high possibility of dielectric breakdown (for example, a tight bent portion of the winding). In a rotating electrical machine for driving a vehicle that must be installed in a limited space such as in an engine room or in a transmission, there is a limit.

  The large generator is a stationary rotating electric machine, and has no severe dimensional constraints in the axial direction. Even when the operating voltage is high, the insulation thickness and the insulation gap between the coils can be made large. It is difficult to apply this to a vehicle having a large dimensional constraint such as an engine room. This is a problem peculiar to a rotating electric machine for driving a vehicle that does not exist in a large generator, and is solved by the technique described in the above embodiment.

  In addition, the said embodiment is applicable to the various motor generators and rotary electric machines used in order to control vehicle tractive force with a hybrid vehicle or an electric vehicle. In general industrial rotating electrical machines, the present invention can also be applied to synchronous motors, induction motors, reluctance synchronous motors, permanent magnet motors, etc., which have a relatively large number of poles and are controlled by an inverter. As an example to which this embodiment is applied, a reluctance synchronous motor is shown in FIG. Thus, the rotor 4 supported by the rotating shaft 5 generates reluctance torque by the magnetic path formed by the magnetic gap 101. A magnet type synchronous motor is shown in FIG. A magnet insertion hole 102 is formed in the rotor 4 and a magnet is inserted therein. Due to the shape of the magnet insertion hole 102 as shown in the figure, magnetic gaps are formed at both ends in the circumferential direction of the square magnet, thereby reducing cogging torque and torque pulsation. Furthermore, an induction motor is shown in FIG. A copper bar or the like is inserted into the groove 103 formed in the rotor 4 and functions as a rotating electrical machine by sliding torque.

  As described above, various embodiments have been described. According to the above embodiment, the number of conductor wires that can be accommodated in one slot is at most about 4 in the wave winding method using a segment coil or hairpin coil using a conventional rectangular cross-section conductor. In order to secure a predetermined number of coil turns, it is necessary to increase the number of slots. However, in this embodiment, the number of turns per slot can be easily increased, and the number of slots and the number of coils can be reduced. As a result, the number of inter-coil connection points in the winding can be greatly reduced, and the connection work time can be shortened and the reliability can be improved.

  In addition, the use of a rectangular cross-section conductor for the conductor wire and the need for interlayer insulation in the slot as compared with the conventional two-layer winding, and the reduction in the thickness of the insulating layer in the depth direction can improve the conductor space factor in the slot. At the same time, by arranging the flat conductors in the slots, the conductor eddy current loss can be suppressed and the winding loss can be reduced.

  Also, by applying a magnetic wedge to the open slot opening, the magnetic flux distribution in the air gap becomes smooth, and iron loss and electromagnetic vibration can be reduced. Furthermore, noise due to electromagnetic vibration of the coil can be reduced by increasing the rigidity of the coil end portion.

  Conventionally, since the resin impregnation process is performed after the coil is mounted in the slot of the stator core, the penetration of the resin between the conductor wires inside the slot has been incomplete. Therefore, it is possible to expect resin impregnation between the conductor strands of the conductor and to form a resin for the outer shape of the slot coil, so that the accuracy of the coil dimensional accuracy can be improved, and the gap between the stator core and the coil can be minimized. These have the advantage that the heat transfer from the conductor wire to the stator core is improved and the cooling performance of the coil is improved.

The axial sectional view of the principal part of the rotary electric machine which makes one Embodiment of this invention is shown. 1A shows a stator core and a coil end portion shape when the rotating electrical machine of FIG. 1A is viewed from the axial direction. FIG. 2 shows a cross-sectional view of the slot portion of FIG. 1. The explanatory view of the conductor shape of the coil end part of the example of Drawing 1 is shown. The connection diagram between each coil of the example of FIG. 1 is shown. The manufacturing process which manufactures the shape of the coil (A) of FIG. 1 is shown. The manufacturing process which manufactures the shape of the coil (b) of FIG. 1 is shown. The block diagram of the vehicle drive system to which the rotary electric machine of the said embodiment is applied is shown. The circuit diagram of the vehicle drive system to which the rotary electric machine of the said embodiment is applied is shown. Problems specific to vehicle drive motors are shown. The example of the rotary electric machine which makes one Embodiment of this invention is shown.

Explanation of symbols

1 Stator Core 1s Slot 1y Yoke Side 2 Winding 2a Coil (A)
2b Coil (b)
4 Rotor

Claims (13)

A rotating electrical machine that includes a rotor and a stator that is disposed to face the rotor and that is controlled in torque by a semiconductor power conversion device and that is mounted on a vehicle and generates driving force or energy regeneration of the vehicle. And
The stator includes a stator iron core having a plurality of slots in which the number of slots per phase per pole is an integer, and a plurality of single-layer coils inserted in each of the slots having the same polarity and the same phase. With windings arranged,
The coil of the winding is composed of a plurality of insulated rectangular conductor wires, and the short sides of the conductor wires are arranged in a row in the depth direction of the slot. The shape of the coil end portion including the span portion between the slots extends from the slot, then bends substantially at right angles toward the outer diameter side of the stator, and then bends in the circumferential direction to the stator core. A first coil group extending so as to form an arc along the outer diameter or inner diameter of the axial end, and extending substantially linearly from the slot and then bending substantially perpendicular to the circumferential direction. A second coil group extending so as to form an arc along the outer diameter or inner diameter of the axial end portion of the stator core, and the first coil group or the second coil group At least one of the shapes after insertion of the slot Rotating electric machine which is previously molded. The rotating electrical machine according to claim 1,
The winding is a rotating electrical machine in which a resin is impregnated in a coil end portion of a coil wound concentrically with the same polarity and the same phase. The rotating electrical machine according to claim 1,
A rotating electrical machine having a reinforcing insulating portion at a portion that approaches the coil in a different phase at a span portion between the coil end portion or the slot. The rotating electrical machine according to claim 1,
The rotating electric machine, wherein the slot of the stator is an open slot having an opening toward the rotor. The rotating electric machine according to claim 4, wherein
The stator has a wedge at the opening of the slot, and a rotating electrical machine in which a magnetic material is used for the wedge. The rotating electrical machine according to claim 1,
The second coil group extends substantially linearly from the slot to a height equal to or higher than the axial height of the first coil group, and then bends substantially perpendicularly to the circumferential direction, and then the axial end of the stator core. A rotating electrical machine that extends in an arc along the outer or inner diameter of the part. A rotating electrical machine that includes a rotor and a stator that is disposed to face the rotor and that is controlled in torque by a semiconductor power conversion device and that is mounted on a vehicle and generates driving force or energy regeneration of the vehicle. The stator includes a stator core having a plurality of open slots in which the number of slots per phase per pole is an integer, and a plurality of single-layer wound coils inserted in each of the slots in the same polarity and in phase. A method of manufacturing a rotating electrical machine having windings arranged concentrically,
The coil of the winding is composed of a plurality of insulated rectangular cross-section conductor strands, and the short sides of the conductor strand cross-sections are stacked and arranged in a row in the depth direction of the slot,
After extending from the slot, the shape of the coil end portion including the span portion between the slots is bent at a substantially right angle toward the outer diameter side of the stator, and then bent in the circumferential direction to form the stator core. The first coil group is formed so as to form an arc along the outer diameter or inner diameter of the axial end,
The shape of the coil end portion including the span portion between the slots extends from the slot substantially linearly, then bends substantially at right angles to the circumferential direction, and then the outer diameter of the axial end of the stator core or The second coil group is formed so as to form an arc along the inner diameter,
Then, the manufacturing method of the rotary electric machine which inserts said 1st coil group and said 2nd coil group in the said slot. A method of manufacturing a rotating electrical machine according to claim 7,
The insulated conductor wire is wound into a substantially plate shape, and then a straight portion inserted into the slot and a span portion between the slots are formed by press-type bending, and the straight portion inserted into the slot A method of manufacturing a rotating electrical machine in which a conductor wire is fixed with a resin to constitute the first coil group and then inserted into the slot. A method of manufacturing a rotating electrical machine according to claim 7,
The insulated conductor wire is wound into a substantially plate shape, and after that, a linear portion inserted into the slot and a span portion between the slots are formed by press-type bending, and then an insulator constituting the slot insulation is pasted. A method of manufacturing a rotating electrical machine that is inserted into the slot after forming the second coil group. A method of manufacturing a rotating electrical machine according to claim 7,
A method of manufacturing a rotating electrical machine in which a coil end portion of the coil that is wound concentrically and concentrically is brought into close contact with and impregnated with resin. A method of manufacturing a rotating electrical machine according to claim 7,
Before inserting the said coil | winding in the said slot, the manufacturing method of the rotary electric machine which provides reinforcement insulation to the site | part which approaches the said coil of a different phase in the said coil end part or the part between the said slots. A method of manufacturing a rotating electrical machine according to claim 7,
The slot of the stator is an open slot having an opening toward the rotor, and a magnetic material wedge is inserted into the opening of the slot after inserting the winding into the slot. . A method of manufacturing a rotating electrical machine according to claim 1,
After the shape of the coil end portion including the span portion between the slots extends substantially linearly from the slot to the axial height of the first coil group or more, it bends at a substantially right angle in the circumferential direction, and then The manufacturing method of the rotary electric machine which shape | molds a 2nd coil group so that an arc may be made | formed along the outer diameter or internal diameter of the axial direction edge part of the said stator core.

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