JP4619098B2 - Insulating member for stator and rotating machine having the same - Google Patents

Description

  The present invention relates to an insulating member for a stator and a rotating machine including the same, and more particularly to an insulating member for a stator that insulates a coil wound around a stator from a stator core and a rotating machine including the same.

  Japanese Patent Laying-Open No. 2002-233090 (Patent Document 1) discloses an insulating member that insulates a coil wound around a tooth of a stator core formed by stacking iron plates from the stator core. The insulating member includes a pair of core pressing portions that sandwich the laminated core constituting the stator core from both sides in the iron plate stacking direction and press the laminated core, and is inserted into the slot and extends in the iron plate stacking direction, and is connected to the pair of core pressing portions. And a connecting portion.

According to the insulating member disclosed in Japanese Patent Laid-Open No. 2002-233090, since the insulating member sandwiches the laminated core from both sides in the axial direction, it is possible to prevent the warp of the laminated core and the expansion in the axial direction ( Patent Document 1).
JP 2002-233090 A JP 2000-14067 A JP-A-10-174378 Japanese Patent Laid-Open No. 10-174337 JP-A-4-210746

  The above-mentioned Japanese Patent Application Laid-Open No. 2002-233090 discloses an insulating member that is divided into two in the iron plate laminating direction at the connecting portion. If the insulating member has such a divided structure, the insulating member is assembled from both sides of the laminated core. Since it must be attached, the assembling property of the insulating member is poor, and the number of parts increases.

  Japanese Patent Laid-Open No. 2002-233090 is an integral insulating member in which a connecting portion is continuous in the iron plate lamination direction over the entire height of the core, and one of the pair of core pressing portions is formed of a flange, and the other core pressing member Also disclosed is an insulating member whose part is a claw. In such an integrated insulating member, it is necessary to insert the insulating member into the slot from one of the end faces of the laminated core in the rotation axis direction. Therefore, when the insulating member is inserted into the slot, the insulating member is not caught by the core, and the assembling property is excellent. However, since this insulating member is constituted by a narrow claw, the insulation between the coil and the laminated core is deteriorated at the coil end on the claw side.

  Accordingly, the present invention has been made to solve such a problem, and an object of the present invention is to provide an insulating member for a stator that is excellent in assembling property and ensures insulation.

  Another object of the present invention is to provide a rotating machine provided with an insulating member for a stator that is excellent in assemblability and has an insulating property.

  According to the present invention, the stator insulating member is a stator insulating member that is mounted in the stator core slot and insulates the coil wound around the stator core teeth from the stator core, and is provided on the inner surface of the slot. And a first flange portion provided at one end of the main body portion and extending from the main body portion toward the circumferential direction of the stator core along one of the end faces of the stator core in the rotation axis direction of the rotating machine, And a second flange portion provided on the opposite side of the end surface of the stator core and extending from the main body portion toward the circumferential direction of the stator core along the other end surface of the stator core, and the flange height of the second flange portion is The flange height of the second flange portion is lower than the flange height of the first flange portion, and the flange thickness of the first flange portion is thicker.

  Preferably, the stator insulating member further includes a lead wire wiring portion provided on the same side as the first flange portion with respect to the main body portion and having a wiring groove for arranging a lead wire of the coil.

  According to the present invention, the rotating machine includes a rotor, a stator core, the plurality of stator insulating members mounted in the plurality of slots of the stator core, and the plurality of stator insulating members mounted in the plurality of slots. And a coil wound around a plurality of teeth of the stator.

  Preferably, the rotating machine further includes an insulating material provided so as to fill a gap between adjacent stator insulating members on an end surface of the stator core where the second flange portion is disposed.

  Preferably, the insulating material includes an insulating mold resin.

  In the stator insulating member according to the present invention, since the flange height of the second flange portion is lower than the flange height of the first flange portion, the stator insulating member is slotted from one end surface of the stator core in the rotation axis direction. Excellent assemblability when inserted into the inside. Further, since the flange thickness of the second flange portion is larger than the flange thickness of the first flange portion, an insulation distance between the coil to be wound and the stator core is secured, and the flange of the second flange portion is secured. Insulating deterioration due to the reduced height is avoided. Therefore, according to the present invention, an insulating member for a stator that is excellent in assemblability and that has an insulating property is realized.

  In the insulating member for stator according to the present invention, the lead wire wiring portion having the wiring groove for arranging the lead wire of the coil is provided on the same side as the first flange portion with respect to the main body portion. Therefore, according to the present invention, the provision of the lead wire wiring portion does not hinder the assembling property when inserting the stator insulating member into the slot.

  In the rotating machine according to the present invention, a plurality of the above-described stator insulating members that are respectively mounted in the plurality of slots of the stator core are provided. In addition, the end face of the stator core on which the second flange portion of each stator insulating member is disposed is further provided with an insulating material provided so as to fill a gap between adjacent stator insulating members. The insulation between the coil and the stator core is reliably ensured. Therefore, according to the present invention, a rotating machine having excellent assembling properties and high reliability is realized.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals and description thereof will not be repeated.

[Embodiment 1]
1 is a cross-sectional view schematically showing a cross section including a rotation shaft of a rotating machine 100 according to Embodiment 1 of the present invention. With reference to FIG. 1, the rotating machine 100 includes a stator core 10, a rotor core 12, a rotating shaft 14, and coils 16 and 18. The stator core 10 is formed by laminating and crimping electromagnetic steel sheets in the direction of the rotation axis, and is fixed to a housing (not shown) of the rotating machine 100. The stator core 10 is wound with coils 16 and 18 for forming a stator magnetic pole, and a coil end is formed at the end of the stator core 10 in the rotation axis direction.

  The rotor core 12 is formed by laminating and crimping electromagnetic steel sheets in the direction of the rotation axis, and is disposed on the inner periphery of the stator core 10 via a gap with the stator core 10. For example, permanent magnets (not shown) constituting rotor magnetic poles are disposed in the rotor core 12 in the circumferential direction, and the rotor core 12 is interlocked with the rotating shaft 14 by interaction with the stator magnetic poles generated in the stator core 10. Rotate around the rotation axis.

  The rotating shaft 14 is fixed to the rotor core 12 and rotates in conjunction with the rotor core 12 to output the rotational force generated in the rotor core 12 to the outside of the rotating machine 100. The coils 16 and 18 are wound around the stator core 10 and generate a rotating magnetic field in the circumferential direction of the stator core 10 by passing a current at a predetermined phase.

  FIG. 2 is a cross-sectional view perpendicular to the rotation axis of the stator core 10 shown in FIG. Referring to FIG. 2, stator core 10 has twelve teeth 21 to 32 and twelve slots 41 to 52 on the inner circumferential side along circumferential direction DR. In each of the teeth 21 to 32, a coil (not shown, the same applies hereinafter) is wound by concentrated winding, for example, and a current is passed through the wound coil, so that the direction of the passed current is determined. A magnetic field is generated.

  Each of the slots 41 to 52 is filled with a coil wound around a tooth adjacent to each slot. Here, since the stator core 10 is composed of a conductive electromagnetic steel plate as described above, an insulating member is provided in each of the slots 41 to 52 in order to ensure insulation between the coil to be wound and the stator core 10. After that, as described above, a coil is wound around each of the teeth 21 to 32.

  3 is a perspective view of the insulating member 60 mounted in each of the slots 41 to 52 shown in FIG. 2, and FIG. 4 shows the lead-side flange portions 62 and 64 of the insulating member 60 shown in FIG. It is a top view of the insulating member 60 seen from the side. 3 and 4, the insulating member 60 includes a main body 61, lead wire side flange portions 62 and 64, anti-lead wire side flange portions 66 and 68, and gap surface side retaining portions 70 and 72. , 74, 76, teeth ear insulating parts 78, 80, yoke side retaining parts 82, 83, and lead wire wiring part 84.

  The insulating member 60 is integrally formed of, for example, elastic insulating nylon. The main body 61 is mounted in the slot, and insulates the coil filled in the slot from the adjacent teeth and the outer yoke portion. The main body 61 has an integrated structure continuous from the lead wire side where the lead wire side flange portions 62, 64 are provided to the anti lead wire side where the anti lead wire side flange portions 66, 68 are provided, and the insulating member 60 serves as a slot. When attached, it is in close contact with the inner surface of the slot. The main body 61 is provided with a plurality of heat radiating holes 86 filled with an insulating mold resin having a thermal conductivity higher than that of nylon constituting the insulating member 60, thereby improving heat dissipation. Furthermore, a coil guide groove 88 for guiding the coil filled in the slot is formed on the inner surface of the main body 61, and the coil space factor in the slot is improved.

  The lead wire side flange portions 62 and 64 are the end portions of the stator core 10 in the rotation axis direction, and the end portions on the side where the lead wires of the coil are wired (hereinafter also simply referred to as “lead wire side”). Is provided to insulate the coil from the coil wound around the teeth. The lead wire side flange portions 62 and 64 are connected to the main body portion 61 and come into close contact with the lead wire side end surface of the stator core 10 when the insulating member 60 is mounted in the slot. The lead wire side flange portions 62 and 64 are also provided with a plurality of heat radiation holes 86 filled with an insulating mold resin having a thermal conductivity higher than that of nylon constituting the insulating member 60.

  The anti-lead wire side flange portions 66 and 68 are the end portions of the stator core 10 in the rotation axis direction, and the end portions on the opposite side to the lead wire side (hereinafter also simply referred to as “anti-lead wire side”). It is provided to insulate the coil wound around the teeth. The non-lead wire side flange portions 66 and 68 are connected to the main body portion 61 and are in close contact with the end surface of the stator core 10 on the non lead wire side when the insulating member 60 is mounted in the slot.

  The gap surface side retaining portions 70, 72, 74, and 76 prevent the wound coil from falling off to the inner peripheral side of the stator when the insulating member 60 is mounted in the slot and the coil is wound around the teeth thereafter. It is provided to prevent Teeth ear part insulating parts 78 and 80 are provided to insulate the ear part formed at the tip part of each of teeth 21 to 32 shown in FIG. 2 from the wound coil. The reason why the ears are formed at the tips of the teeth 21 to 32 is to reduce the loss of the rotating machine 10.

  The yoke-side retaining portions 82 and 83 are provided to prevent the wound coil from falling off to the outer peripheral side of the stator when the insulating member 60 is mounted in the slot and the coil is wound around the teeth thereafter. It is done. The lead wire wiring portion 84 is provided on the outer peripheral side of the yoke side retaining portion 82 along the lead wire side flange portions 62 and 64. The lead wire wiring portion 84 is formed with a wiring groove for arranging and wiring the lead wires.

  5 is a cross-sectional view of the cross-section VV of the insulating member 60 shown in FIG. Referring to FIG. 5, in this insulating member 60, the flange height a <b> 2 of the non-lead wire side flange portions 66 and 68 is lower than the flange height a <b> 1 of the lead wire side flange portions 62 and 64. This is because the assembling property of the insulating member 60 to the slot is taken into consideration. That is, when the insulating member 60 is inserted into the slot from the lead wire side end face of the stator core 10 with the anti-lead wire side flange portions 66 and 68 at the head, if the flange height of the flange portion is too high, the adjacent teeth are disposed. Therefore, the insulating member cannot be easily inserted into the slot. Therefore, in this insulating member 60, the insulating member 60 is placed in the slot by making the flange height a2 of the non-lead wire side flange portions 66, 68 lower than the flange height a1 of the lead wire side flange portions 62, 64. It can be easily inserted into.

  On the other hand, in this insulating member 60, the flange thickness b2 of the anti-lead wire side flange portions 66, 68 is larger than the flange thickness b1 of the lead wire side flange portions 62, 64. This is because the insulating property of the insulating member 60 on the side opposite to the lead wire is taken into consideration. That is, as described above, from the viewpoint of assembly of the insulating member 60, in this insulating member 60, the flange height a <b> 2 of the non-lead wire side flange portions 66 and 68 is set to the flange of the lead wire side flange portions 62 and 64. Since the height is lower than the height a1, if the flange thickness of the anti-lead wire side flange portions 66 and 68 is equal to the flange thickness of the lead wire side flange portions 62 and 64, the anti lead wire side by the insulating member 60 is assumed. The insulation properties of the deteriorated. Therefore, in this insulating member 60, the anti-lead wire of the stator core 10 is formed by making the flange thickness b2 of the anti-lead wire side flange portions 66, 68 thicker than the flange thickness b1 of the lead wire side flange portions 62, 64. An insulation distance between the stator core 10 and the wound coil is secured on the side end face.

  6 and 7 are views showing a state in which the insulating member 60 shown in FIG. 6 and 7, insulating member 60 is automatically inserted into slot 41 from the lead wire side end surface of stator core 10 by, for example, a machine. Here, the insulating member 60 can be bent by the elasticity of the material. That is, the insulating member 60 can be bent so as to narrow the opening width of the opening that opens to the inner peripheral side along the circumferential direction DR.

  When the insulating member 60 is inserted into the slot 41, the opening side is clamped, and the opening width of the opening portion is narrowed along the circumferential direction DR. It is inserted into the slot 41 from the lead wire side end face of the stator core 10 starting from the 68 side. When the insulating member 60 is assembled to the slot 41 and then the clamp that has held the opening is removed, the insulating member 60 is caused to react with the slot by a reaction force that the opening tries to expand along the circumferential direction DR. It adheres to the inner surface of 41.

  FIG. 8 is a cross-sectional view of the stator showing a state in which an insulating member is attached to the slot of the stator core 10. FIG. 8 shows a cross-sectional view when the stator is viewed from the inner peripheral side of the stator. Referring to FIG. 8, the upper side of the drawing is the lead wire side of the stator, and the lower side of the drawing is the anti-lead wire side of the stator. Insulating members 60.1 and 60.2 are mounted in the slots 41 and 42, respectively. Here, on the lead wire side of the tooth 22, the insulating members 60.1 and 60.2 are in close contact with each other without a gap, but on the opposite lead wire side of the tooth 22, the insulating members 60.1 and 60.2 are in contact with each other. Since the flange height of the anti-lead wire side flange portions 66 and 68 is low, there is a gap between the insulating members 60.1 and 60.2.

  In the rotating machine 10, in order to ensure the insulation between the stator core 10 and the coil wound around the stator core 10, an insulating mold resin 90 is provided between the adjacent insulating members 60 on the side opposite to the stator. Provided. That is, in the rotating machine 10, the flange heights of the anti-lead wire side flange portions 66 and 68 of the insulating member 60 are lowered in order to improve the assembling property of the insulating member 60, and the anti-lead wire of the insulating member 60 is In order to prevent deterioration of insulation on the side opposite to the lead wire due to the lower flange height of the side flange portions 66 and 68, the flange thickness of the anti-lead wire side flange portions 66 and 68 of the insulating member 60 is increased. However, in order to make the insulation more reliable, the space between the adjacent insulating members 60 is filled with the insulating mold resin 90 on the side opposite to the lead wire of the stator core 10.

  In addition, on the lead wire side of the stator, since the adjacent lead wire side flange portions 62 and 64 are in close contact with each other at the upper portion of the teeth, insulation is secured.

  In the above, in order to ensure insulation, first, the flange thickness of the anti-lead wire side flange portions 66 and 68 of the insulation member 60 is increased, and further, the mold resin 90 is provided to further increase the insulation. However, if it is assumed that the space between the adjacent insulating members 60 on the side opposite to the lead of the stator is filled with the mold resin 90, the flange thicknesses of the flanges 66 and 68 on the side opposite to the lead of the insulating member 60 are assured. Can be designed at a level equivalent to the flange thickness of the lead wire side flange portions 62 and 64.

  As described above, according to the first embodiment, the flange height of the anti-lead wire side flange portions 66 and 68 of the insulating member 60 is lower than the flange height of the lead wire side flange portions 62 and 64. The member 60 can be easily inserted into the slot. Therefore, the assembling property of the insulating member 60 is improved.

  Since the lead wire wiring portion 84 having the wiring groove for guiding the lead wire is connected to the lead wire side flange portions 62 and 64, the insulating member 60 is provided by providing the lead wire wiring portion 84. The assembling property when inserted into the slot is not hindered.

  Further, according to the insulating member 60, the flange thickness of the anti-lead wire side flange portions 66, 68 is thicker than the flange thickness of the lead wire side flange portions 62, 64, so the insulating member 60 is mounted in the slot, Thereafter, when the coil is wound, an insulation distance between the stator core 10 and the wound coil can be secured on the end surface on the side opposite to the lead wire of the stator core 10. Therefore, insulation by the insulating member 60 is ensured.

  Further, since the insulating mold resin 90 is provided between the adjacent insulating members 60 on the side opposite to the lead wire of the stator core 10, the insulation between the stator core 10 and the coil becomes higher. If it is assumed that the mold resin 90 is provided, the flange thicknesses of the anti-lead wire side flange portions 66 and 68 of the insulating member 60 can be reduced. In this case, the rotating machine 10 can be downsized.

  Furthermore, the insulating member 60 has elasticity, and when the insulating member 60 is mounted in the slot, the insulating member 60 is caused by a reaction force that the opening of the insulating member 60 tries to expand along the circumferential direction. Closely contacts the inner surface of the slot.

  Further, since a plurality of heat radiation holes 86 filled with mold resin are provided in the main body portion 61 and the lead wire side flange portions 62 and 64 of the insulating member 60, the insulating member 60 ensures insulation. However, heat dissipation can be improved.

  Further, since the insulating member 60 has gap surface side retaining portions 70, 72, 74, 76 and yoke side retaining portions 82, 83, the coil is prevented from falling off to the gap surface side or the yoke side. The Moreover, since the insulating member 60 has the tooth ear | edge part insulation parts 78 and 80, the insulation with a tooth ear | edge part is ensured reliably.

  Further, since the insulating member 60 is provided with the coil guiding groove 88 in the main body 61, the coils filled in the slots are arranged in an orderly manner without any gaps. Therefore, according to the insulating member 60, the space factor of the coil in the slot can be increased.

[Embodiment 2]
FIG. 9 is a plan view of the insulating member 60A viewed from the lead wire side flange portions 62 and 64 of the insulating member 60A according to the second embodiment of the present invention. Referring to FIG. 9, this insulating member 60 </ b> A includes an interphase insulating portion 92 instead of teeth ear insulating portion 78 in the configuration of insulating member 60 according to the first embodiment. The other configuration of the insulating member 60A is the same as the configuration of the insulating member 60 according to the first embodiment.

  The interphase insulating portion 92 insulates the coil formed around the ear portion formed at the tip of each of the teeth 21 to 32 shown in FIG. 2 and also insulates the coils of different phases filled in the slots from each other. To do. That is, when the coil winding structure is concentrated winding, in one slot, the first phase coil A wound around one of the teeth adjacent to the slot and the other of the teeth adjacent to the slot And the second phase coil B wound around. In the insulating member 60A, the interphase insulating portion 92 is folded into the slot, thereby ensuring insulation between the coils A and B having different phases.

  FIG. 10 is a diagram illustrating a state when the interphase insulating portion 92 of the insulating member 60A illustrated in FIG. 9 is folded into the slot. Referring to FIG. 10, after coil A is wound around the teeth covered by lead wire side flange portion 62, interphase insulating portion 92 is folded into the slot. Then, after the interphase insulating portion 92 is folded into the slot, the coil B is wound around the teeth covered by the lead wire side flange portion 64. Thereby, the coil A and the coil B are insulated from each other by the interphase insulating portion 92.

  As described above, according to the second embodiment, since the two-phase coils different from each other can be insulated in the slot by folding the interphase insulating portion 92 in the slot, a simple structure without increasing the number of parts. Thus, the interphase insulation of the coil in the slot can be realized.

  In the first and second embodiments, the number of teeth and slots of the stator core 10 is twelve. However, the number of teeth and slots is not limited to twelve. Moreover, in said Embodiment 1, although the coil wound around each tooth shall be wound by concentrated winding, the winding structure of a coil is not restricted to concentrated winding, distribution is carried out. It may be a volume.

  In the above description, a so-called “series coil” in which a coil is directly wound around a tooth is assumed, but a so-called “cassette coil” in which a coil wound in advance is attached to a tooth may be used. .

  In the above description, the insulating members 60 and 60A are made of nylon resin. However, the material of the insulating members 60 and 60A is not limited to nylon, but other insulating resin materials. You may comprise by these.

  In the above description, the insulating members 60 and 60A constitute “stator insulating members”. The lead wire side flange portions 62 and 64 constitute a “first flange portion”, and the anti-lead wire side flange portions 66 and 68 constitute a “second flange portion”. The mold resin 90 constitutes an “insulating material”.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and is intended to include meanings equivalent to the scope of claims for patent and all modifications within the scope.

It is sectional drawing which shows schematically the cross section containing the rotating shaft of the rotary machine by Embodiment 1 of this invention. FIG. 2 is a cross-sectional view perpendicular to the rotation axis of the stator core shown in FIG. 1. FIG. 3 is a perspective view of an insulating member attached to each of the slots shown in FIG. 2. It is a top view of the insulating member seen from the lead wire side flange part side of the insulating member shown in FIG. It is sectional drawing of the cross section VV in the insulating member shown in FIG. It is a 1st figure which shows a mode that the insulating member shown in FIG. 3 is mounted | worn with a slot. It is a 2nd figure which shows a mode that the insulation member shown in FIG. 3 is mounted | worn with a slot. It is sectional drawing of a stator which shows a mode that the insulating member was mounted | worn with the slot of the stator core. It is a top view of the insulating member seen from the lead wire side flange part side of the insulating member by Embodiment 2 of this invention. It is a figure which shows a mode when the interphase insulation part of the insulation member shown in FIG. 9 is folded in the slot.

Explanation of symbols

  10 Stator Core, 12 Rotor Core, 14 Rotating Shaft, 16, 18 Coil, 21-32 Teeth, 41-52 Slot, 60, 60.1, 60.2, 60A Insulating Member, 61 Main Body, 62, 64 Lead Wire Side Flange , 66, 68 Anti-lead wire side flange, 70, 72, 74, 76 Gap face side retaining portion, 78, 80 Teeth ear insulating portion, 82, 83 Yoke side retaining portion, 84 Lead wire wiring portion, 86 heat dissipation holes, 88 coil induction grooves, 90 mold resin, 92 interphase insulation.

Claims (5)

A stator insulating member that is installed in a slot of the stator core and insulates a coil wound around the teeth of the stator core from the stator core,
A main body disposed on the inner surface of the slot;
One end face of the stator core in the rotation axis direction of the rotating machine is provided at one end of the main body portion to insulate from the coil, and from the main body portion toward the circumferential direction of the stator core along the one end face A first flange portion extending;
In order to insulate the other end face of the stator core from the coil, the stator core is provided on the opposite side of the first flange portion with the body portion interposed therebetween, and from the body portion to the circumferential direction of the stator core along the other end face A second flange portion extending toward
The flange height of the second flange portion is lower than the flange height of the first flange portion,
The stator insulating member, wherein a flange thickness of the second flange portion is greater than a flange thickness of the first flange portion.   2. The stator insulation according to claim 1, further comprising a lead wire wiring portion provided on the same side as the first flange portion with respect to the main body portion and having a wiring groove for arranging a lead wire of the coil. Element. A rotor,
A stator core;
The plurality of stator insulating members according to claim 1 or 2, wherein the stator insulating members are mounted in a plurality of slots of the stator core, respectively.
A rotating machine comprising: a plurality of stator insulating members; and a coil wound around a plurality of teeth of a stator mounted in the plurality of slots.   The rotating machine according to claim 3, further comprising an insulating material provided so as to fill a gap between adjacent stator insulating members on an end surface of the stator core on which the second flange portion is disposed.   The rotating machine according to claim 4, wherein the insulating material includes an insulating mold resin.

Images