JP2009112114A - Rotating electric machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotating electric machine capable of simplifying a structure of a current collector distribution panel, and securing a creeping distance between connecting parts of an edge portion of each coil and a bus bar in the rotating electric machine provided with the current collector distribution panel connecting the edge portion of each coil with the bus bar. <P>SOLUTION: In the rotating electric machine, the current collector distribution panel 130 extends so as to protrude from one edge portion 172 of a stator 140 in an axial direction, and includes a plurality of through-holes which can receive the edge portions of the coil 142, a plurality of wirings which are electrically connected to the received edge portions of the coil 142, at least either one of a recess part or a projecting part which is formed on the first main surface facing one edge portion in the axial direction of main surface of the current collector distribution panel 130, and a groove portion which is formed on the second main surface positioned on the opposite side to the first main surface and can receive respective wirings. At least either one of the recess portion or the projecting portion is provided at a part positioned at least between the through-holes in the first main surface. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a rotating electrical machine, and more particularly to a rotating electrical machine that is provided on one axial end face of a stator and has a current collecting and distributing plate including a plurality of wirings connected to a stator coil and connected to a bus bar.

  Conventionally, a bus bar array plate and a concentrated power distribution member are disposed on one axial end face of the annularly formed stator, and each coil and bus bar are connected using the bus bar array plate and the concentrated power distribution plate. Various rotating electrical machines have been proposed.

  For example, a rotating electrical machine described in Japanese Patent Application Laid-Open No. 2005-328661 is provided on the end surface side in the axial direction of a stator and includes a flat plate terminal block, and a core winding coil is provided in a window formed on the terminal block. The terminal which protrudes from a part is inserted, and the core winding coil and the bus bar are connected.

Furthermore, the brushless motor described in Japanese Patent Application Laid-Open No. 2003-134753 includes an annular concentrated power distribution plate disposed on one axial end face side of the stator, and the concentrated power distribution plate includes three holding members extending in the circumferential direction. A plurality of grooves, a bus bar accommodated in each holding groove, and a plurality of dubs provided in each bus bar and connected to the ends of the windings are provided.
Japanese Patent Laid-Open No. 2005-328661 JP 2003-134753 A

  However, in the brushless motor described in the above Japanese Patent Application Laid-Open No. 2003-134753, it is necessary to provide a plurality of tabs on the central power distribution plate, and the configuration of the central power distribution plate itself is complicated.

  Furthermore, the rotating electrical machine described in Japanese Patent Application Laid-Open No. 2005-328661 has a problem that the creepage distance between the window portions into which the terminals of the coil winding coils are inserted is short.

  The present invention has been made in view of the problems as described above, and an object of the present invention is to provide a current collector / distribution plate in a rotating electrical machine including a current collector / distribution plate that connects an end of each coil and a bus bar. An object of the present invention is to provide a rotating electrical machine capable of ensuring a creepage distance between the connection portions between the end portions of the coils and the bus bars while having a simple configuration.

  A rotating electrical machine according to the present invention includes a rotating shaft that is rotatably supported, a rotor fixed to the rotating shaft, and an annular stator provided around the rotor. The stator includes a stator core, a plurality of coils wound around the stator core, and a current collector and distribution plate disposed at one axial end of the stator. The current collector / distribution plate extends so as to protrude from the axial end, and includes a plurality of through holes that can receive the end of the coil, a plurality of wirings that are electrically connected to the end of the received coil, Of the main surface of the current collecting and distributing plate, at least one of a concave portion or a convex portion formed on the first main surface facing one axial end and a second located on the opposite side to the first main surface. And a groove formed on the main surface and capable of receiving each wiring. Further, at least one of the concave portion or the convex portion is provided in a portion located at least between the through holes in the first main surface.

  Preferably, the electrical distribution board is formed in an annular shape, and one end of each coil is positioned on the outer peripheral side of the stator with respect to the other end, and the through hole can receive the other end. A plurality of first through-holes arranged in an annular shape, and a plurality of second through-holes positioned on the outer peripheral side of the stator with respect to the first through-holes and accepting one end of each, and arranged in an annular shape Including holes. And at least one of the said recessed part or convex part is cyclically | annularly formed so that the part located between a 1st through-hole and a 2nd through-hole among 1st main surfaces may be passed.

  Preferably, at least one of the concave portion or the convex portion is arranged in a plurality with a space in the radial direction of the stator. Preferably, the depth of the groove in the axial direction of the stator is made deeper than the height of the wiring in the axial direction of the stator.

  According to the rotating electrical machine according to the present invention, the current collector / distribution plate connecting each coil and the bus bar can have a simple configuration, and further, it is possible to ensure a creepage distance between the connection portions of the coil and the bus bar. it can.

  A rotating electrical machine according to an embodiment of the present invention will be described with reference to FIGS. Note that in the embodiments described below, when referring to the number, amount, and the like, the scope of the present invention is not necessarily limited to the number, amount, and the like unless otherwise specified. In the following embodiments, each component is not necessarily essential for the present invention unless otherwise specified. In addition, when there are a plurality of embodiments below, it is planned from the beginning to appropriately combine the features of each embodiment unless otherwise specified.

  FIG. 1 is a side sectional view of a rotating electrical machine 100 according to the present embodiment. As shown in FIG. 1, the rotating electrical machine 100 includes a rotor 120 fixed to a rotating shaft 110, a stator 140 provided around the rotor 120 and formed in an annular shape, and one axial direction of the stator 140. And a current collector / distribution plate 130 disposed on the end face side.

  The rotor 120 includes a rotor core 125 fixed to the rotating shaft 110, a permanent magnet 123 inserted into a magnet insertion hole 126 formed in the rotor core 125, and a rotor end provided at both axial ends of the rotor 120. Plate 122. The magnet insertion hole 126 is filled with resin 124, and the permanent magnet 123 is fixed.

  The stator 140 includes a stator core 141 formed in an annular shape and a coil 142 wound around the stator core 141.

  The stator core 141 includes an annular yoke portion 170 and a plurality of stator teeth 171 projecting inwardly in the radial direction of the stator 140 from the inner peripheral surface of the yoke portion 170. A plurality of stator teeth 171 are formed at intervals in the circumferential direction of the stator 140, and a coil 142 is wound around the stator teeth 171.

  FIG. 2 is a plan view when the stator 140 is viewed in plan from the axial direction of the rotating shaft 110. As shown in FIG. 2, the coil 142 includes U-phase coils 143 and 144, V-phase coils 145 and 146, and W-phase coils 147 and 148.

  One wiring end 163 and wiring end 153 of the U-phase coil 143 extend so as to protrude from one axial end surface 172 of the axial end surfaces 172 and 173 arranged in the axial direction of the stator 140. Yes.

  Similarly, wiring end 154 and wiring end 164 of U-phase coil 144, wiring end 155 and wiring end 165 of V-phase coil 145, wiring end 156 and wiring end 166 of V-phase coil 146, The wiring end 157 and the wiring end 167 of the W-phase coil 147 and the wiring end 158 and the wiring end 168 of the W-phase coil 148 are both axial end surfaces 172 arranged in the axial direction of the stator 140. 173 extends from one end surface 172 in the axial direction.

  FIG. 3 is a plan view of the current collector / distribution plate 130 viewed in plan from the axial direction of the rotating shaft 110. As shown in FIG. 3, the current collector / distribution plate 130 is formed in a flat plate ring shape, and is made of an insulating material such as resin or plastic. Among the main surfaces of the current collector / distribution plate 130, the main surface 180A (second main surface) located on the opposite side to the main surface 180B facing the axial end surface 172 has wiring end portions 153 to 158, respectively. The through holes 253 to 258 to be inserted and the through holes 263 to 268 into which the wiring end portions 163 to 168 are inserted are provided.

  The current collector / distribution plate 130 includes the wiring 210 to be electrically connected to the wiring ends 153 to 158 and the wiring ends 163 to 168 inserted in the through holes 253 to 258 and the through holes 263 to 268. 215, and the wirings 210 to 215 are accommodated in the groove portions 220 to 225, respectively.

  Here, an insulating film is formed on the surface of the wiring that constitutes the coil 142, and on the other hand, of the surface of the wiring that constitutes the coil 142, the portion that contacts the wirings 210 to 215 and the wirings 210 to 215. , The insulating coating is peeled off, and the wiring end portions 153 to 158 and the wiring end portions 163 to 168 are electrically connected to the wirings 210 to 215 and the wirings 210 to 215.

  2 and 3, the wiring end 163 of the U-phase coil 143 is connected to the external wiring 201 shown in FIG. 3, and the wiring end 165 of the V-phase coil 145 is connected to the external wiring 202. Furthermore, the wiring end 167 of the W-phase coil 147 is connected to the external wiring 203.

  Here, rotating electric machine 100 according to the present embodiment is mounted on, for example, a hybrid vehicle, and external wirings 201, 202, and 203 are connected to a battery via, for example, an inverter and a converter mounted on the hybrid vehicle. ing. The external wirings 201, 202, and 203 are supplied with AC power that is out of phase. That is, the rotating electrical machine 100 is supplied with three-phase AC power.

  The wiring end 153 of the U-phase coil 143 is located on the radially inner side of the stator 140 with respect to the wiring end 163 and is connected to one end of the wiring 210. The other end of the wiring 210 is connected to the wiring end 164 of the U-phase coil 144, and the U-phase coil 143 and the U-phase coil 144 are electrically connected.

  Further, the wiring end 155 of the V-phase coil 145 is located on the radially inner side of the stator 140 with respect to the wiring end 165 and is connected to one end of the wiring 211. The other end of the wiring 211 is connected to the wiring end 166 of the V-phase coil 146.

For this reason, the V-phase coil 145 and the V-phase coil 146 are electrically connected.
The wiring end 157 of the W-phase coil 147 is located radially inward of the stator 140 with respect to the wiring end 167 and is connected to one end of the wiring 213. The other end of the wiring 213 is connected to the wiring end 168. For this reason, the W-phase coil 147 and the W-phase coil 148 are electrically connected.

  Here, the wiring end 154 of the U-phase coil 144 is located radially inward of the stator 140 with respect to the wiring end 164, and the wiring end 156 of the V-phase coil 146 is connected to the wiring end 166. In contrast, the wiring end 158 of the W-phase coil 148 is positioned radially inward of the stator 140 with respect to the wiring end 168.

  Each wiring end 154 and wiring end 156 are electrically connected by wiring 214, and further, wiring end 156 and wiring end 158 are electrically connected by wiring 215. . That is, the neutral point of the rotating electrical machine 100 is configured by electrically connecting the wiring end 154, the wiring end 156, and the wiring end 158.

  In this way, each U-phase coil 143 to W-phase coil 148 is connected, and power is supplied to each U-phase coil 143 to W-phase coil 148, thereby exciting each U-phase coil 143 to W-phase coil 148. The rotor 120 rotates.

  Here, the wiring end portions 163, 164, 165, 166, 167, 168 are positioned on the radially outer side of the stator 140 with respect to the wiring end portions 153, 154, 155, 156, 157, 158. ing. The wiring end portions 163, 164, 165, 166, 167, and 168 are arranged on a virtual circle R1 centered on the rotation center line of the rotating shaft 110, and the wiring end portions 153, 154, 155, and the like. 156, 157 and 158 are also arranged on an imaginary circle R2 centered on the rotary shaft 110. The diameter of the virtual circle R1 is larger than the diameter of the virtual circle R2.

  4 is a cross-sectional view taken along line IV-IV in FIG. As shown in FIG. 4, a main surface 180 </ b> B (first main surface) that faces the axial end surface 172 of the current collector / distribution plate 130 has a protrusion (protrusion) 270 that protrudes toward the coil 142. Is formed.

  And this protrusion part 270 is formed in the part located between the through-hole 264 and the through-hole 257 among the main surfaces 180B.

  For this reason, the creepage distance between the connection portion between the wiring end portion 157 and the wiring 213 and the connection portion between the wiring end portion 164 and the wiring 210 (the creepage distance is the surface of the insulator connected between the two bare charging portions. Is the shortest distance along which leakage can occur.) Is the opening edge of the through hole 257 on the main surface 180B side, the surface of the protrusion 270, and the opening edge of the through hole 264 from the connection end of the wiring end 157 and the wiring 213 This is the distance to the connection portion between the wiring 210 and the wiring end 164 through the portion. For this reason, a creeping distance can be ensured longer than the case where the protrusion part 270 is not formed.

  Grooves 220, 221, 222 are formed on main surface 180 A of current collector / distribution plate 130 on one axial end face side of stator 140, and walls defining the side surfaces of each groove 220, 221, 222 are formed. The height of the stator 140 in the axial direction is higher than the height of the wires 210, 211, and 213. Further, the groove 221 is located between the groove 223 in which the wiring 213 is accommodated and the groove 220 in which the wiring 210 is accommodated. Therefore, a long distance is secured between the connection portion between the wiring 213 and the wiring end portion 157 and the connection portion between the wiring end portion 164 and the wiring 210.

  Here, as shown in FIG. 3, the protruding portion 270 is formed in an annular shape, between the through hole 263 and the through hole 258, between the through hole 265 and the through hole 253, and between the through hole 267 and the through hole. It extends in an annular shape so as to pass between the through hole 264 and the through hole 257, between the through hole 266 and the through hole 254, and between the through hole 268 and the through hole 256.

  The protrusion 270 is formed on an imaginary circle R3 centered on the rotation center line of the rotary shaft 110. The diameter of the virtual circle R3 is smaller than the diameter of the virtual circle R1 and larger than the diameter of the virtual circle R2.

  Therefore, a long creepage distance is ensured between the connection portion between the external wiring 201 and the wiring end portion 163 and the connection portion between the wiring end portion 158 and the wiring 215.

  A long creepage distance is secured between the connecting portion between the external wiring 202 and the wiring end 165 and the connecting portion between the wiring end 153 and the wiring 210. A long creepage distance is secured between the connecting portion between the external wiring 203 and the wiring end portion 167 and the connecting portion between the wiring 211 and the wiring end portion 155. A long creepage distance can be ensured between the connection portion between the wiring end portion 164 and the wiring 210 and the connection portion between the wiring end portion 157 and the wiring 213. A creeping distance between a connection portion between the wiring end portion 166 and the wiring 211 and a connection portion between the wiring end portion 154 and the wiring 214 can be ensured. A creepage distance between the connection portion between the wiring end portion 168 and the wiring 213 and the connection portion between the wiring end portion 156 and the wirings 214 and 215 can be secured.

  Thus, in the rotating electrical machine 100 according to the present embodiment, it is possible to ensure the creepage distance between the connection portions.

  FIG. 5 is a cross-sectional view of the current collector / distribution plate 130 showing a modification of the current collector / distribution plate 130. In the example shown in FIG. 5, the plurality of protrusions 271 and 272 are formed in a portion of the main surface 180 </ b> B located between the through hole 257 and the through hole 264. The projecting portion 271 and the projecting portion 272 are formed to be spaced apart from each other in the radial direction of the stator 140, and a connection portion between the wiring 213 and the wiring end portion 157, and a connection portion between the wiring end portion 164 and the wiring 210. It is possible to secure a creepage distance.

  Furthermore, the present invention is not limited to the case where the creepage distances of the respective connecting portions are ensured by forming the protrusions as described above, and the creepage distance may be ensured by forming the recesses on the main surface 180B.

  Although the embodiment of the present invention has been described above, it should be considered that the embodiment disclosed this time is illustrative and not restrictive in all respects. The scope of the present invention is defined by the terms of the claims, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims. Furthermore, the above numerical values are examples, and are not limited to the above numerical values and ranges.

  INDUSTRIAL APPLICABILITY The present invention can be applied to a rotating electrical machine, and in particular, a rotating electrical machine in which wiring is arranged on a current collector / distribution plate provided on one axial end surface of a stator to connect a stator coil and to a bus bar. It is suitable for.

It is side sectional drawing of the rotary electric machine which concerns on this Embodiment. It is a top view when a stator is planarly viewed from the axial direction of a rotating shaft. It is the top view which planarly viewed the current collection and distribution board from the axial direction of the rotating shaft. It is sectional drawing in the IV-IV line of FIG. It is sectional drawing of the current collection and distribution board which shows the modification of an electricity collection and distribution board.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 100 Rotating electrical machine, 110 Rotating shaft, 120 Rotor, 122 Rotor end plate, 123 Permanent magnet, 124 Resin, 125 Rotor core, 130 Current collection and distribution board, 140 Stator, 141 Stator core, 142 Coil, 143, 144 U-phase coil, 145 146 V phase coil, 147, 148 W phase coil, 153, 154, 155, 156, 157, 158, 163, 164, 165, 166, 167, 168 Wiring end, 170 Yoke part, 171 Stator teeth, 201, 202 , 203 External wiring, 210, 211, 212, 213, 214, 215 Wiring, 220, 221, 222, 223, 224, 225 Groove, 263, 264, 265, 266, 267, 268 Through holes.

Claims (4)

A rotating shaft rotatably supported; and
A rotor fixed to the rotating shaft;
An annular stator provided around the rotor,
The stator includes a stator core, a plurality of coils wound around the stator core, and a current collector and distribution plate disposed at one axial end of the stator,
Both ends of the coil extend so as to protrude from one axial end of the stator,
The current collector / distribution plate includes a plurality of through-holes capable of receiving end portions of the coils, a plurality of wires electrically connected to the received end portions of the coils, and a main surface of the current collector / distribution plate. Among them, formed on the second main surface located on the opposite side with respect to the first main surface, at least one of the concave or convex portion formed on the first main surface facing the one axial end, Including a groove portion capable of receiving each of the wires,
At least one of the concave portion or the convex portion is a rotating electrical machine provided at least in a portion of the first main surface located between the through holes. The current collector / distribution plate is formed in an annular shape,
One end of each of the coils is located on the outer peripheral side of the stator with respect to the other end,
The through hole is capable of receiving the other end, and is positioned on the outer peripheral side of the stator with respect to the plurality of first through holes arranged in a ring and the first through hole, A plurality of second through-holes that are receivable and arranged in an annular shape;
2. The at least one of the concave portion or the convex portion is formed in an annular shape so as to pass through a portion of the first main surface located between the first through hole and the second through hole. The rotating electrical machine described.   3. The rotating electrical machine according to claim 1, wherein at least one of the concave portion or the convex portion is arranged in plural at intervals in a radial direction of the stator.   The rotary electric machine according to any one of claims 1 to 3, wherein a depth of the groove portion in the axial direction of the stator is deeper than a height of the wiring in the axial direction of the stator.

Images