JP2007174826A - Stator for dynamo-electric machine, insulator, and bus bar unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily perform the connection between a terminal on a bus bar side and a terminal on a coil side even when the positional accuracy between the terminal on the bus bar side and the terminal on the coil side is low. <P>SOLUTION: A stator for dynamo-electric machine adopts such constitution that it is equipped with split cores 4, in Fig. 2, which are arranged annularly, a coil 6, which is wound via an insulator 5 on each split core 4, a terminal 10 on a coil side, which is fixed to the insulator 5 and is connected to the coil 6, an annular bus bar unit 3, and a terminal 19 on a bus bar side, which is provided in a position corresponding to the terminal 10 on the coil side of the bus bar unit 3, that the terminal 10 on the coil side has flexibility in the circumferential direction of the stator, and that the bus bar terminal 19 has a V-shaped cut 22 with its cross direction in the circumferential direction of the stator and also with its depth direction in the axial direction of the stator, in the contact position of the terminal 10 on the coil side. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a stator for a rotating electric machine (for example, a motor) incorporated in a hybrid vehicle or a fuel cell vehicle.

  As a stator for a rotating electrical machine, a coil is wound around a split core via an insulator, the coil is connected to a coil side terminal fixed to the insulator, and the coil core is arranged at a position corresponding to each coil side terminal of the split core arranged in an annular shape. A bus bar unit having a bus bar side terminal is provided, and the bus bar side terminal of the bus bar unit is connected to a coil side terminal (Patent Document 1).

  However, when the bus bar side terminals are connected to the coil side terminals, if the positional accuracy of the bus bar side terminals and the coil side terminals is not sufficient, the positions of all the bus bar side terminals are set to the coil side terminal positions corresponding to the bus bar side terminals. Difficult to match. On the other hand, in order to increase the position accuracy of the bus bar side terminal and the coil side terminal, the position accuracy of the annularly arranged divided core, the position accuracy of the coil side terminal with respect to each divided core, the position accuracy of the bus bar side terminal with respect to the bus bar unit, etc. Respectively, which increases the production cost of the stator for a rotating electrical machine. Therefore, the operation | work which connects a coil side terminal and a bus-bar side terminal was complicated.

JP 2005-51999 A

  The problem to be solved by the present invention is to enable easy connection between the bus bar side terminal and the coil side terminal even when the positional accuracy of the bus bar side terminal and the coil side terminal is low.

  In order to solve the above-described problems, the split cores arranged in an annular shape, the coils wound around the split cores via the insulators, fixed to the insulators, and connected to the coils A coil side terminal; an annular bus bar unit; and a bus bar side terminal provided at a position corresponding to the coil side terminal of the bus bar unit. The coil side terminal has flexibility in a stator circumferential direction. The bus bar-side terminal has a V-shaped cutout portion in the contact position with the coil-side terminal in which the circumferential direction of the stator is the width direction and the stator axial direction is the depth direction. did. In this stator for a rotating electrical machine, the coil side terminal is bent in the circumferential direction of the stator by the contact between the V-shaped notch of the bus bar side terminal and the coil side terminal, and the misalignment of the bus bar side terminal and the coil side terminal in the circumferential direction of the stator is absorbed. To do.

This stator for a rotating electrical machine becomes more preferable when the following configuration is added.
1) The coil side terminal is provided with a flat plate-like flexible portion extending in the stator radial direction with the circumferential direction of the stator as the thickness direction, and one end of the flexible portion in the stator radial direction is fixed to the insulator.
2) Flexibility in the stator radial direction is imparted to the bus bar side terminal, and the stator radial direction is the width direction and the stator axial direction is the depth direction at the contact position of the coil side terminal with the bus bar side terminal. A V-shaped notch is formed.
3) The bus bar unit includes three annular power supply bus bars, a holder for holding each power supply bus bar at the position of the apex of a triangle in a cross section perpendicular to the circumferential direction of the stator, and the above-mentioned fixed to the holder. Consists of bus bar side terminals.

  Moreover, in this invention, as an insulator used for said stator for rotary electric machines, the cylindrical part arrange | positioned between the split core of the stator for rotary electric machines, and the coil wound around the split core, The stator of the cylindrical part Provided is an insulator having a flange portion formed at an outer end in the radial direction and a coil side terminal that is fixed to the flange portion and has flexibility in the stator circumferential direction.

  In this insulator, it is preferable that a flat plate-like flexible portion extending in the stator radial direction with the circumferential direction of the stator as a thickness direction is provided on the coil side terminal. The stator has a radial direction in the stator radial direction and a stator. It is more preferable to provide a V-shaped notch with the axial direction as the depth direction.

  Further, in the present invention, as the bus bar unit used in the stator for a rotating electrical machine, the annular power feeding bus bar incorporated in the stator for the rotating electrical machine is connected to the power feeding bus bar, and the circumferential direction of the stator is the width direction. And a bus bar side terminal having a V-shaped notch with the stator axial direction as the depth direction.

This bus bar unit becomes more preferable when the following configuration is added.
1) Flexibility in the stator radial direction is given to the bus bar side terminal.
2) The power supply bus bar includes three power supply bus bars, a holder that holds each power supply bus bar at the position of the apex of a triangle in a cross section perpendicular to the circumferential direction of the stator, and the bus bar side terminal fixed to the holder. .

  In the stator for a rotating electrical machine according to the present invention, the coil side terminal is bent by contact with the V-shaped notch portion of the bus bar side terminal, and the deflection causes the displacement of the bus bar side terminal and the coil side terminal in the circumferential direction of the stator. Even when the position of the bus bar side terminal and the position of the coil side terminal are shifted in the stator circumferential direction, the bus bar side terminal and the coil side terminal can be easily connected.

  Furthermore, the coil side terminal is provided with a flat plate-like flexible portion extending in the stator radial direction with the circumferential direction of the stator as the thickness direction, and one end of the flexible portion in the stator radial direction is fixed to the insulator. Since the terminal is difficult to bend in the stator axial direction, when the V-shaped notch of the bus bar side terminal is brought into contact with the coil side terminal shifted in the stator circumferential direction with respect to the bus bar side terminal, the coil side terminal is securely It bends in the stator circumferential direction and absorbs the displacement of the bus bar side terminal and the coil side terminal in the stator circumferential direction.

  Further, the bus bar side terminal is provided with flexibility in the stator radial direction, and the stator radial direction is defined as the width direction and the stator axial direction is defined as the depth direction at the contact position of the coil side terminal with the bus bar side terminal. In the case where the V-shaped notch portion is formed, the bus bar side terminal is bent by contact with the notch portion, and the displacement of the bus bar side terminal and the coil side terminal in the stator radial direction is absorbed by the bending. Therefore, even when the position of the bus bar side terminal and the position of the coil side terminal are shifted in the stator radial direction, the bus bar side terminal and the coil side terminal can be easily connected.

  In addition, the bus bar unit includes three annular power supply bus bars, a holder for holding each power supply bus bar at the position of the apex of a triangle in a cross section perpendicular to the circumferential direction of the stator, and the above-mentioned fixed to the holder. The bus bar-side terminal is composed of the power supply busbars as compared to the case where the power supply busbars are arranged in a line in a cross section perpendicular to the circumferential direction of the stator. Can be installed.

  FIG. 1 shows an embodiment of a stator for a rotating electrical machine according to the present invention. The stator includes a segment stator 1 arranged in an annular shape, a cylindrical housing 2 that clamps the segment stator 1 from the outer periphery, and a bus bar unit 3 that supplies electric power to each segment stator 1.

  As shown in FIG. 2, the segment stator 1 is obtained by winding a coil 6 around an divided core 4 via an insulator 5. When the coil 6 is energized, the divided core 4 is magnetized.

  As shown in FIG. 3, the insulator 5 includes a cylindrical portion 7 interposed between the split core 4 and the coil 6, and flange portions 8 and 9 formed respectively at the inner end and the outer end in the stator radial direction of the cylindrical portion 7. Have. Both the cylindrical portion 7 and the flange portions 8 and 9 are made of an insulator, and a coil side terminal 10 connected to the coil 6 is fixed to the flange portion 8 at the outer end in the stator radial direction. The insulator 5 can be attached to the divided core 4 by being divided in the stator axial direction at the position of the dividing line 5a.

  As shown in FIG. 4, the coil side terminal 10 includes a flat plate-like flexible portion 11 extending in the stator radial direction with the circumferential direction of the stator as a thickness direction, and a stator circumferential direction from the inner end of the flexible portion 11 in the stator radial direction. And a flat plate-like fixing portion 12 extending to the surface. The fixing portion 12 is fitted and fixed between the flange portion 8 of the insulator 5 and the holding piece 13 formed to face the flange portion 8. The fixed portion 12 is formed with a round groove 14 for receiving the end of the coil wire, and the flexible portion 11 has a V-shape with the stator radial direction as the width direction and the stator axial direction as the depth direction. A notch 15 is formed.

  On the other hand, as shown in FIG. 5, the bus bar unit 3 has annular power supply bus bars 16u, 16v, 16w corresponding to the three-phase alternating current U, V, W phases, and the power supply bus bars 16u, 16v, A holder 17 is attached to 16w at a certain interval in the circumferential direction. As shown in FIG. 6, the holder 17 is formed of a cylindrical body formed with a circular groove 18 on the outer periphery for housing the power supply bus bars 16u, 16v, 16w, and each power supply bus bar 16u, 16v, 16w is positioned at the apex of the equilateral triangle. Hold on. Further, as shown in FIGS. 7A, 7B, and 7C, the bus bar side terminal 19 that is in contact with any of the power supply bus bars 16u, 16v, and 16w housed in the circular groove 18 is fixed to the holder 17. Is provided.

  As shown in FIG. 6, the bus bar side terminal 19 includes a flat plate-like flexible portion 20 that extends in the stator axial direction with the stator radial direction as the thickness direction, and extends from one end of the flexible portion 20 in the stator axial direction in the stator radial direction. It is composed of a flat plate-like fixing portion 21 that comes out. The fixing portion 21 is fixed to the resin holder 17 by integral molding. The flexible portion 20 is formed with a V-shaped notch 22 having the circumferential direction of the stator as the width direction and the stator axial direction as the depth direction.

  This stator can be assembled as follows, for example. First, the segment stator 1 shown in FIG. 2 is arranged in an annular shape, and the housing 2 is shrink-fitted onto the outer periphery of the segment stator 1. Next, as shown in FIG. 8, the bus bar unit 3 is placed on the segment stator 1 with the positions of the bus bar side terminals 19 and the coil side terminals 10 corresponding to each other, and as shown in FIG. The notch 22 is brought into contact with the V-shaped notch 15 of the coil-side terminal 10 and is pressed in the stator axial direction.

  At this time, even if there is a deviation between the position of the bus bar side terminal 19 and the position of the coil side terminal 10, the flexible portion 11 of the coil side terminal 10 is located on the inner surface of the V-shaped notch 22 of the bus bar side terminal 19. Guided and bent, and the deflection of the bus bar side terminal 19 and the coil side terminal 10 in the circumferential direction of the stator is absorbed. Further, the flexible portion 20 of the bus bar side terminal 19 is guided by the inner surface of the V-shaped cutout portion 15 of the coil side terminal 10 to bend, and the bending causes the bus bar side terminal 19 and the coil side terminal 10 in the stator radial direction. Misalignment is absorbed.

  Thereafter, each bus bar side terminal 19 and each coil side terminal 10 are TIG welded together.

  Thus, in this stator for a rotating electrical machine, the V-shaped notch portion 22 of the bus bar side terminal 19 is brought into contact with the flexible portion 11 of the coil side terminal 10 to bend the flexible portion 11, and the bending causes the bus bar side to be bent. The positional deviation in the stator circumferential direction between the terminal 19 and the coil side terminal 10 can be absorbed. Therefore, even when the position of the bus bar side terminal 19 and the position of the coil side terminal 10 are shifted in the stator circumferential direction, the bus bar side terminal 19 and the coil side terminal 10 can be easily TIG-welded.

  Further, since the flexible portion 11 of the coil side terminal 10 is difficult to bend in the stator axial direction, the coil side terminal 10 is deformed in the stator axial direction even when the stator circumferential direction force and the stator axial direction force are simultaneously received. Hateful. Therefore, when the V-shaped notch portion 22 of the bus bar side terminal 19 is brought into contact with the flexible portion 11 of the coil side terminal 10 and is pressed, the flexible portion 11 is surely bent in the circumferential direction of the stator, and the bus bar side terminal 19. And the position shift of the stator side direction of the coil side terminal 10 is absorbed.

  Further, in this stator for a rotating electrical machine, the flexible portion 20 of the bus bar side terminal 19 is brought into contact with the V-shaped cutout portion 15 of the coil side terminal 10 to bend the flexible portion 20, and the bus bar side terminal 19 is bent by the bending. And the position shift of the stator radial direction of the coil side terminal 10 can be absorbed. Therefore, even when the position of the bus bar side terminal 19 and the position of the coil side terminal 10 are shifted in the stator radial direction, the bus bar side terminal 19 and the coil side terminal 10 can be easily TIG-welded.

  Further, since the holder 17 holds the power supply bus bars 16u, 16v, and 16w at the apex of the triangle in a cross section perpendicular to the circumferential direction of the stator, the power supply bus bars 16u, 16v, and 16w are arranged in a row in the cross section perpendicular to the circumferential direction of the stator. Compared to the case where the power supply bus bars 16u, 16v and 16w are gathered, the power supply bus bars 16u, 16v and 16w are arranged. For this reason, the stator for a rotating electric machine is small in size of the bus bar unit 3 and can be installed in a narrow place.

  In the said embodiment, although the bus-bar side terminal 19 and the coil side terminal 10 are TIG-welded, you may connect by another system, for example, you may connect by resistance welding or brazing.

The perspective view which shows embodiment of the stator for rotary electric machines of this invention The perspective view which shows the segment stator integrated in the stator for rotary electric machines of FIG. The perspective view which shows the insulator of the segment stator of FIG. The perspective view explaining the coil side terminal of the insulator of FIG. The perspective view which shows the bus-bar unit integrated in the stator for rotary electric machines of FIG. The perspective view explaining the holder of the bus-bar unit of FIG. (A) is a cross-sectional view illustrating a bus bar side terminal connected to a W-phase power supply bus bar, (b) is a cross-sectional view illustrating a bus bar side terminal connected to a U-phase power supply bus bar, and (c) is a V phase. Sectional drawing explaining the bus bar side terminal connected to the bus bar for electric power feeding The perspective view which shows the assembly process of the stator for rotary electric machines of FIG. The exploded perspective view explaining the contact state of a bus-bar side terminal and a coil side terminal

Explanation of symbols

3 Busbar unit 4 Divided core 5 Insulator 6 Coil 7 Tube portion 8, 9 Flange portion 10 Coil side terminal 11 Flexible portion 12 Fixing portion 15 Notch portions 16u, 16v, 16w Power supply bus bar 17 Holder 19 Bus bar side terminal 20 Flexible Part 22 Notch

Claims (10)

  Split cores 4 arranged in an annular shape, coils 6 wound around the split cores 4 via insulators 5, and coil-side terminals fixed to the insulators 5 and connected to the coils 6 10, an annular bus bar unit 3, and a bus bar side terminal 19 provided at a position corresponding to the coil side terminal 10 of the bus bar unit 3. The coil side terminal 10 is flexible in the circumferential direction of the stator. The bus bar side terminal 19 has a V-shaped notch 22 at the contact position with the coil side terminal 10 with the circumferential direction of the stator as the width direction and the stator axial direction as the depth direction. Stator.   The coil side terminal 10 has a flat plate-like flexible portion 11 extending in the stator radial direction with the circumferential direction of the stator as the thickness direction, and one end of the flexible portion 11 in the stator radial direction is fixed to the insulator 5. The stator for a rotating electrical machine according to claim 1.   The bus bar side terminal 19 has flexibility in the stator radial direction, and the coil side terminal 10 has a V-shaped notch 15 having the stator radial direction as the width direction and the stator axial direction as the depth direction. The stator for a rotating electrical machine according to claim 1, wherein the stator is in a position in contact with the bus bar side terminal 19.   The bus bar unit 3 has three annular power supply bus bars 16u, 16v, 16w, and holders for holding the power supply bus bars 16u, 16v, 16w at the apex of the triangle in a cross section perpendicular to the circumferential direction of the stator. The stator for a rotating electrical machine according to claim 1, comprising a bus bar side terminal 19 fixed to the holder 17.   A cylindrical portion 7 disposed between the split core 4 of the stator for a rotating electrical machine and the coil 6 wound around the split core 4, and a flange portion 8 formed at the outer end of the cylindrical portion 7 in the stator radial direction. And a coil side terminal 10 that is fixed to the flange portion 8 and has flexibility in the circumferential direction of the stator.   The insulator according to claim 5, wherein the coil side terminal (10) has a flat plate-like flexible portion (11) extending in the stator radial direction with the circumferential direction of the stator as a thickness direction.   The insulator according to claim 6, wherein the flexible portion 11 has a V-shaped cutout portion 15 in which a stator radial direction is a width direction and a stator axial direction is a depth direction.   Annular power supply bus bars 16u, 16v, 16w incorporated in the stator for a rotating electrical machine, and connected to the power supply bus bars 16u, 16v, 16w, the stator circumferential direction is the width direction and the stator axial direction is deep. A bus bar unit comprising a bus bar side terminal 19 having a V-shaped cutout portion 22 in the vertical direction.   The bus bar unit according to claim 8, wherein the bus bar side terminal 19 has flexibility in a stator radial direction.   Three power supply bus bars 16u, 16v, 16w, a holder 17 that holds each of the power supply bus bars 16u, 16v, 16w at a triangular vertex in a cross section perpendicular to the circumferential direction of the stator, and fixed to the holder 17 The bus bar unit according to claim 8, comprising the bus bar side terminal 19.

Images