JP2015091146A - Concentrated winding stator of rotary electric machine and rotary electric machine including the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the concentrated winding stator of a rotary electric machine, capable of easily and surely arranging an insulating member between stator coils concentratedly wound and obtaining insulation between the stator coil and the back yoke of a stator core, and a rotary electric machine including the same.SOLUTION: The concentrated winding stator of a rotary electric machine comprises: a bobbin 3; a stator core 10; a stator coil 2 concentratedly wound in the bobbin 3 and a power collection/distribution member connected with the stator coil 2. A slot space of the stator core 10 is formed in an approximately T shape by a space 100 formed of a back yoke 11 of the stator core and a side wall part 32 of the bobbin and a space 200 formed by the stator coils adjacent in the slot. An approximately T shaped insulating member 9 is inserted in the approximately T shaped slot space.

Description

  The present invention relates to a stator of a concentrated winding rotary electric machine and a rotary electric machine including the stator.

  As a background art in this technical field, there is JP 2008-42959 A (Patent Document 1). This publication states that “it provides an electric motor in which an insulating member can be easily inserted into a slot of a stator of the electric motor, insulation failure is reduced, and quality is improved”. Moreover, there exists Unexamined-Japanese-Patent No. 2011-103751 (patent document 2). This publication states that "Improvement of insulation performance and reduction of insulation work man-hours in the concentrated winding motor".

JP 2008-42959 A JP 2011-103751 A

  Patent Document 1 describes a structure in which an insulating member can be easily inserted into a slot in a concentrated winding type rotating electrical machine.

  However, in Patent Document 1, a resin insulating member (bobbin) having a concave groove serving as a guide for arranging an insulating member between adjacently wound stator coils in a slot is arranged only on the side surface of the stator core. In the case of a stator core having a long shaft length, there is a possibility that a sufficient guide function for inserting an insulating member into the stator may not be achieved.

  Moreover, in the said patent document 1, in order to comprise the thin recessed groove | channel as a guide of insertion of insulating paper in a resin insulation member, a part of shaping | molding die of a resin insulation member is comprised thinly. There is a need. When molding the resin insulation member, there is a possibility that thermal stress may concentrate on the thin part of the mold of the mold, and there is a concern that the life of the mold of the resin insulation member may be shortened.

  Further, in Patent Document 1, film-like slot insulation is performed in order to ensure insulation between the stator coil and the back yoke 11 portion of the stator core. In this structure, the stator is placed after the film is installed on the stator core. Since the coil is wound, there is a risk that the film is damaged when the stator coil is wound, and the dielectric strength between the stator coil and the back yoke 11 portion of the stator core is reduced.

  Patent Document 2 describes a structure in which concentrated winding stator coils are covered with insulating paper.

  However, in Patent Document 2, in order to efficiently perform the work of covering the stator coil with insulating paper, a work space is required around the stator coil. That is, there is a work space around the stator coil before the bobbin around which the stator coil is wound is attached to the teeth, or the stator coil on which the bobbin around which the stator coil is wound is attached is divided for each tooth. It is desirable that there is a working space around the stator coil because it is in a broken state, but after attaching the insulating paper to the stator coil, attaching the bobbin to the teeth, or assembling the divided stator core into an annular shape There is a risk of damaging the insulating paper during these operations.

  Therefore, in the present invention, a stator of a concentrated winding rotating electric machine that can easily and reliably arrange an insulating member between concentrated winding stator coils and ensure insulation between the stator coil and the back yoke of the stator core, and a rotating electric machine including the stator The purpose is to provide.

  In order to solve the above problems, for example, the configuration described in the claims is adopted. The present application includes a plurality of means for solving the above-described problems. For example, a bobbin, a stator core to which the bobbin is mounted, and a stator coil wound around the bobbin by a concentrated winding method. And the stator core of the concentrated winding rotating electrical machine connected to the stator coil, wherein the stator core is surrounded by the teeth and the back yoke constituting the magnetic circuit, and the teeth and the back yoke The bobbin is located on the inner diameter side of the stator, the winding portion where the stator coil is wound, the first side wall of the winding portion facing the back yoke of the stator core, and And a stator coil wound around the bobbin is adjacent to the stator in the slot. Facing the stator coil wound around the bobbin mounted on the teeth of the door, and the slot portion includes a first space constituted by the first side wall and the back yoke, and a stator core adjacent in the slot. A substantially T-shaped space is formed by the second space formed between the stator coils wound around the bobbin attached to the teeth, and the blade portion is inserted into the first space of the substantially T-shaped space. And an insulating member having a partition plate portion inserted into the second space of the T-shaped space.

  According to the present invention, an insulating member can be easily and reliably disposed between concentrated stator coils, and the stator of the concentrated winding electric machine capable of ensuring insulation between the stator coils and the back yoke of the stator core, and the rotation provided with the stator An electric machine can be provided.

  Problems, configurations, and effects other than those described above will be clarified by the following description of embodiments.

The figure which shows the stator assembly 1 of the concentrated winding type rotary electric machine. The figure which shows the state before mounting | wearing with a bobbin to teeth. The side view when attaching one bobbin to the teeth. The side view of a stator when a bobbin is attached to teeth. The bird's-eye view at the time of inserting insulating paper after attaching a bobbin to teeth. The side view of the stator after inserting insulating paper. The figure which shows the bobbin which has protrusion. The figure which shows the stator assembly which mounted | wore with the bobbin which has a processus | protrusion.

Embodiments of the present invention will be described below with reference to the drawings.
[Example 1]
FIG. 1 shows a stator assembly 1 of a concentrated winding type rotating electrical machine. The stator assembly 1 includes a stator core 10 that constitutes a magnetic circuit of a rotating electrical machine, a bobbin 3 around which the stator coil 2 is wound in a concentrated manner, and a conductive member (current collection and distribution member) that is connected to the stator coil 2 and constitutes an electric circuit. ) 41, 42, 43, 44, the connection ring 5 formed in an annular shape with an insulating material in which the conductive members 41, 42, 43, 44 are disposed, and the insulation disposed in the slot portion 13 (space) of the stator core It is composed of paper 9.

  The stator core 10 is formed by punching or etching a magnetic steel sheet having a thickness of about 0.05 to 1.0 mm in an annular shape and laminating a plurality of sheets, and a rotor and a magnet (not shown) facing each other through a minute gap. The circuit includes a back yoke 11 and a tooth 12 that constitute a circuit, and a slot portion 13 exists between the teeth.

  On the side surface in the axial direction of the stator core 10, a conductive member 41 constituting a three-phase alternating current U-phase, a conductive member 42 constituting a V-phase, a conductive member 43 constituting a W-phase, and a three-phase Y A connection ring 5 in which a neutral wire 44 for constituting a connection is accommodated is disposed. In this embodiment, the structure of the stator of the rotating electrical machine having three-phase Y connection is taken as an example, but the number of conductive members varies depending on the connection method and the number of AC phases.

  The conductive members 41, 42, and 43 are connected to an external power converter (not shown). When a rotating electrical machine incorporating this stator assembly operates as an electric motor, electric power is supplied from the outside to the conductive member (rotating electric machine), and when operating as a generator, electric power is transmitted from the conductive member (rotating electric machine) to the outside. Is supplied.

  The stator coil 2 is wound around the bobbin in a concentrated manner, and the end of the stator coil is connected to the neutral wire 44 and one of the conductive members 41, 42, and 43 to form a three-phase AC circuit. Configure.

  FIG. 2 shows a state before the bobbin 3 is attached to the teeth 12 of the stator core 10.

  The bobbin is made of an insulating member such as a resin, and maintains insulation between the stator coil wound around the bobbin and the stator core. The bobbin has an insertion hole 35 that fits with the tooth 12 of the stator core 10 at the center, and faces the back yoke 11 when the stator coil 1 is disposed on the winding portion 31 around which the stator coil is wound. And a side wall portion 33 disposed on the radially inner side of the stator assembly 1. The side wall portion 32 facing the back yoke 11 has a pair of side wall portions 32A, B located on both sides in the axial direction and a pair of side wall portions 32C, D located on both sides in the circumferential direction.

  The pair of side wall portions 32C and D located on both sides in the circumferential direction includes a portion that contacts the back yoke 11 when the bobbin 3 is attached to the tooth 12, and a portion that faces the back yoke 11 through the space. As shown in FIG. The step 34 is provided at a circumferential end portion of the pair of side wall portions 32C, D located on both sides in the circumferential direction of the bobbin substantially linearly in the axial direction of the stator assembly.

  The bobbin 3 is inserted and attached to the teeth 12 of the stator core from the inner diameter side of the stator core toward the outer circumferential direction.

  FIG. 3 is a side view when one bobbin 3 is attached to the teeth 12.

  When the bobbin 3 is mounted on the teeth 12 of the stator core, spaces 100 are formed between the portions of the slot 13 where the steps 34 at both ends of the side wall of the bobbin are installed and the back yoke 11 of the stator core. Is done.

  As understood from FIG. 3, the space 100 is configured to penetrate the stator in the axial direction, and the width of the space 100 in the radial direction of the stator is set slightly wider than the thickness of the insulating paper 9.

  FIG. 4 is a side view of the stator when the bobbin is attached to the teeth.

  The spaces 100 are formed between each bobbin and the back yoke 11 of the stator core. Therefore, a substantially T-shaped space 200 is formed in the slot 13 by a space between the stator coil adjacent in the space 100 and the slot 13.

  The substantially T-shaped space 200 is configured to penetrate the stator in the axial direction, and the width of the space 200 between the adjacent stator coils in the slot is insulated from the space 200 as will be understood from FIG. It is set slightly wider than the insulating paper to be inserted so that the paper can be inserted.

  FIG. 5 is a bird's-eye view when the insulating paper is inserted after the bobbin is mounted on the teeth.

  The insulating paper 9 is formed in a substantially T shape so as to be accommodated in the substantially T-shaped space 200, and is composed of a single sheet of insulating paper.

  Specifically, it has a pair of wings 9A and 9B inserted into the space 100, and has partition plates 9C and 9D that are inserted into the space 200 and electrically insulate the adjacent coils 2 and 2 from each other.

  The pair of wing portions 9A, 9B extend in the clockwise direction and the counterclockwise direction at the radially outer ends of the partition plate portions 9C, 9D.

  When the partition plate portions 9C and 9D are formed from a single sheet of insulating paper, a folded portion 9E is formed at the inner peripheral end portion.

  The partition plate portions 9C and 9D can be formed so as to open in a V shape from the folded portion 9E toward the wing portions 9A and 9B.

  The insulating paper 9 can be replaced with a resin molded member made of an insulating resin material. When constituted by a resin molded member, it can also be constituted as a T-shaped integrally molded insulating member.

  Needless to say, even in the case of resin molding, the partition portion may be formed as a pair of partition portions that open in a V shape.

  Since the space 200 has a shape substantially penetrating in the axial direction of the stator assembly 1, as can be understood from FIG. 4, the insulating paper 9 can be inserted into the slots of the stator core from the axial direction of the stator core 1.

  FIG. 6 is a side view of the stator after inserting the insulating paper.

  As understood from FIG. 6, since the insulating paper is disposed between the adjacent stator coils 5, the stator coils and the stator coils do not face each other, and space insulation is ensured. In addition, the insulating paper 9 is disposed in the space 100 so that the space 100 has a labyrinth structure, and the stator coil wound around the bobbin and the back yoke 11 portion of the stator core as compared with the state before the insulating paper is inserted. A long creepage distance is secured.

  FIG. 7 shows a bobbin having a projection 35 for preventing positioning after inserting the insulating paper into the stator and preventing the paper from falling off after insertion.

  As understood from FIG. 5, the space 200 into which the insulating paper 9 is inserted is in a state of penetrating in the axial direction. Therefore, when the insulating paper 9 is inserted in the axial direction of the stator assembly, the position of the insulating paper is the insulating paper. It is necessary to control by a machine or the like that inserts the sheet, but by installing the projection 35 shown in FIG. 7, when the insulating paper 9 is inserted until the insulating paper 9 comes into contact with the projection 35, insulation is achieved. Paper can be placed in place.

  Further, as understood from FIG. 5, since the space 200 into which the insulating paper 9 is inserted is in a state of penetrating in the axial direction, the insulating paper may fall off after the insulating paper is inserted. By installing the protrusions 35 shown in FIG. 7, the insulating paper is supported by the protrusions, and even after the insulating paper is inserted into the stator assembly, it is possible to prevent the insulating paper from falling out of the stator assembly.

  The protrusion 35 is disposed at the end of the step 34 of the side wall 32 of the bobbin. In order not to impair the insertion property of the insulating paper, the side located in the direction in which the insulating paper is inserted (the outside of the projection in the axial direction of the stator) is inclined.

  FIG. 8 shows a stator assembly equipped with a bobbin having a protrusion 35.

The position of the insulating paper is constrained by the contact of the insulating paper 9 in which the stator core is inserted with the projection 35. Further, as can be understood from FIG. 7, since the protrusions 35 are disposed at both ends of the bobbin, once the insulating paper is disposed between the protrusions, the position of the insulating paper is maintained without dropping.
[Other embodiments]
In the first embodiment, the space 100 between the bobbin 3 and the back yoke 11 part 11 of the stator core is configured by providing a step on the side wall of the bobbin. Even if the structure is provided to form the space 100, a substantially T-shaped space can be formed in the slot portion, and the same effect can be obtained.

  In the first embodiment, the insulating paper formed in a substantially T shape is shown as an example of the insulating member to be inserted into the slot. However, if the insulating member has the same shape, the same effect can be obtained without using the insulating paper. Is possible. For example, an insulating member having a T-shaped cross section perpendicular to the rotation center axis of the rotating machine may be used.

  In the first embodiment, the protrusions 35 are arranged at both ends of the step of the bobbin, but the same effect can be obtained with only one end.

  In the first embodiment, the bobbin 3 is a single resin member. When the bobbin 3 is attached to the teeth of the stator core, the bobbin 3 is inserted from the inner diameter side of the stator core. However, the bobbin is not necessarily a single resin component. For example, the same effect can be obtained even when the divided bobbin is attached to the stator core teeth from the axial direction of the stator core.

  As described above, according to the present invention, since the insulating paper can be inserted after the bobbin around which the stator coil is wound is disposed on the teeth of the stator core in the concentrated winding motor, there is no risk of damage to the insulating paper when the stator assembly is manufactured. A structure to be eliminated can be provided.

  In addition, after the bobbin around which the stator coil is wound in the concentrated winding motor is disposed on the teeth of the stator core, it is possible to provide a structure in which the insulating paper is reliably disposed between the facing stator coils in the slot.

  Further, in a concentrated winding motor, only by inserting a sheet of insulating paper into each slot, space insulation between the stator coils facing each other in the slot and insulation between the stator coil wound around the bobbin and the back yoke 11 of the stator core are provided. Since the creepage distance is secured, it is possible to provide a structure that reduces the amount of insulating paper used and the time for inserting the insulating paper.

  Further, in the concentrated winding motor, the guide for facilitating the insertion of the insulating paper is constituted by the bobbin and the stator core, so there is no need to provide a thin plate portion in the shape of the bobbin and to form a concave groove in the bobbin. Life can be kept.

  In addition, this invention is not limited to an above-described Example, Various modifications are included. For example, the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described. Further, a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment. Further, it is possible to add, delete, and replace other configurations for a part of the configuration of each embodiment.

DESCRIPTION OF SYMBOLS 1 Stator assembly 2 Stator coil 3 Bobbin 9 Insulating paper 10 Stator core 11 Back yoke 12 Teeth 13 Slot (space)
31 Bobbin side wall (winding part around which the stator coil is wound)
32 Bobbin side wall (side wall portion arranged on the side facing the back yoke, first side wall)
33 Bobbin side wall (side wall portion arranged on the inner side in the radial direction of the stator, second side wall)
34 Step portion on side wall of bobbin 35 Projection on step portion on side wall of bobbin 41 U phase 42 V phase 43 W phase 44 Neutral point (neutral line)
100 Space between back yoke and bobbin 200 Space between stator coils facing in slot

Claims (11)

With bobbin,
A stator core to which the bobbin is mounted;
A stator coil wound around the bobbin by a concentrated winding method;
In the stator of the concentrated winding rotating electric machine comprising the current collecting and distributing member connected to the stator coil,
The stator core is configured by a tooth portion and a back yoke constituting a magnetic circuit, and a slot portion including a space surrounded by the teeth and the back yoke,
The bobbin includes a winding part around which the stator coil is wound, a first side wall of the winding part facing the back yoke of the stator core, and a second side wall of the winding part located on the inner diameter side of the stator. And
The stator coil wound around the bobbin faces the stator coil wound around the bobbin attached to the teeth of the stator core adjacent in the slot,
The slot portion is formed between a first space formed by the first side wall and the back yoke, and a stator coil wound around a bobbin attached to a tooth of a stator core adjacent in the slot. A substantially T-shaped space is formed by the two spaces,
A concentrated winding comprising an insulating member having a wing portion inserted into the first space of the substantially T-shaped space and a partition plate portion inserted into the second space of the T-shaped space. A stator for rotating electrical machines. In the stator of the concentrated winding rotary electric machine according to claim 1,
Concentrated winding, characterized in that a step is provided in a part of the first side wall to form a space formed by the side wall of the winding part facing the back yoke of the stator core of the bobbin and the back yoke of the stator core. A stator for rotating electrical machines. In the stator of the concentrated winding rotary electric machine according to claim 1,
Concentrated, characterized in that a step is provided in a part of the back yoke of the stator core, and a space is formed by the side wall of the winding part facing the back yoke of the stator core of the bobbin and the back yoke of the stator core. A stator for a wound rotary electric machine. In the stator of the concentrated winding electric rotating machine according to claim 2,
A part of a step of the first side wall has a protrusion, and the protrusion is located at an end of the step. In the stator of the concentrated winding electric rotating machine according to claim 4,
The stator of a concentrated winding rotating electric machine, wherein the protrusion is inclined only in a direction in which the insulating paper can be inserted into the substantially T-shaped space.   A rotating electrical machine having the stator of the concentrated winding rotating electrical machine according to any one of claims 1 to 5.   Used for rotating electrical machines in which coils wound around bobbins are mounted on stator teeth. Between wings inserted between stator back yoke and coil bobbin edge and between adjacent coils. An insulating member composed of a partition plate inserted into the housing. The insulating member according to claim 7,
An insulating member made of paper. The insulating member according to claim 7,
An insulating member whose material is an insulating resin. The insulating member according to claim 8,
The partition plate portion includes a pair of partition plate portions folded back at the folded-back portion at the end portion on the opposite wing portion side,
An insulating member provided with the wing | blade part extended in the circumferential direction opposite side in the anti-folding side edge part of both partition plate parts, respectively. The insulating member according to claim 9,
An insulating member having a T-shaped cross section perpendicular to the rotation center axis of the rotating machine.