JP2008167518A - Stator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a small and high output of a stator which improves its insulation resistance, keeping its winding space factor. <P>SOLUTION: It is equipped with insulating paper 12 which insulates slot wall parts made on both sides of the magnetic pole part of a laminated core 11, an end insulator 13 which covers the end in the direction of lamination of the laminated core 11 and the end of the slot wall part 12a of the insulating paper 12, and a magnet wire 14 which is wound concentratedly on the stator core insulated by the insulating paper 12 and the end insulator 13. The slot wall parts 12a of the insulating paper 12 are set to project to both sides from the thickness of the laminated core 11. The end insulator 13 is provided with a groove 13a which engages with the projected slot wall part 12a. In condition that the slot wall parts 12a are engaged severally with the grooves 13a, it is wound concentratedly. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to securing insulation resistance at an edge portion of an iron core in a stator that is wound around a pole tooth portion in a concentrated manner.

  In recent years, in order to achieve a smaller and higher output of a motor, it has been practiced to improve the space factor (winding space factor) in the winding slots. Specifically, a concentrated winding is generally performed on a stator core divided into pole units, and a concentrated winding is performed in a state in which the stator cores of pole units are connected in a lateral direction.

In order to realize a high-density winding of the stator, increase the insulation resistance between the phases, and provide a small and high-output motor, a coil is wound around the coil winding part via an insulating sheet to form a winding body, and the insulating sheet Has been proposed to reduce the size by forming a stator of an electric motor by connecting the polar tooth units which are elastic and flexible and cover the outer exposed surface of the winding body in an annular shape. (For example, refer to Patent Document 1).
JP-A-9-56099

  The problem to be solved is that the edge portion of the end insulator due to the winding tension is deformed and a crack is likely to occur, resulting in a decrease in dielectric strength. In order to realize a high-density winding, concentrated winding under high speed and high tension causes deformation at the edge portion of the end insulator in contact with the iron core, and cracks are likely to occur, resulting in a decrease in insulation resistance.

  On the other hand, if the wall thickness of the end insulator is increased as a whole, the mechanical strength is improved and the insulation resistance can be secured, but the slot area that can be wound is reduced, and the winding space factor is reduced. Decrease.

  The present invention solves the above-described conventional problems, and an object of the present invention is to provide a small high-power stator that maintains the winding space factor and improves the dielectric strength.

  In order to solve the above problems, the present invention provides an insulating paper that insulates slot wall portions formed on both sides of a pole tooth portion of a laminated core, a stacking direction end of the stacked core, and a slot wall end of the insulating paper. An end insulator covering the stator and a magnet wire wound around the stator core insulated with the insulating paper and the end insulator, wherein the slot wall portions of the insulating paper are arranged on both sides from the thickness of the laminated core. The groove is configured to protrude to the end insulator, and is provided with a groove portion that engages with the slot wall portion that protrudes from the end insulator, and the slot wall portion is engaged with the groove portion and concentrated winding is performed. A child.

  Further, the slot wall portion of the insulating paper is set so as to protrude on both sides from the thickness of the laminated core, and the vicinity of the center of the pole tooth of the slot wall portion is bent to the pole tooth side.

According to the stator of the present invention, the slot wall portion of the insulating paper is set so as to protrude on both sides from the stacked core thickness, and is engaged with the groove portion of the end insulator. The slot area is not reduced, and the winding space factor can be maintained. Further, the stress concentrated on the edge portion of the end insulator due to the winding tension can be relaxed by the slot wall portion protruding from the laminated iron core, and the generation of cracks due to deformation can be prevented, so that the insulation resistance can be improved.

  Further, the insulation resistance can be improved by bending the slot wall portion of the insulating paper toward the pole tooth side so as to cover the pole tooth edge portion where the stress is concentrated by the winding tension. Further, there is no reduction in the slot area after forming the insulating slot, and the winding space factor can be maintained.

  Therefore, it is possible to obtain a small and high output stator that maintains the winding space factor and improves the dielectric strength.

  Insulating paper that insulates slot wall portions formed on both sides of the pole tooth portion of the laminated iron core, an end insulator covering the lamination direction end portion of the laminated iron core and the slot wall end portion of the insulating paper, the insulating paper and the end A stator comprising a magnet core that is wound around a stator core insulated by an insulator, wherein the slot wall portion of the insulating paper is set so as to protrude on both sides from the thickness of the laminated core, and the end insulator And a groove portion that engages with the protruding slot wall portion, and is wound in a concentrated manner in a state where the slot wall portion is engaged with the groove portion.

  The stator according to the first embodiment is formed by intensively winding a slot wall portion of insulating paper that protrudes on both sides from the thickness of the laminated core to engage with a groove portion provided in the end insulator to form an insulating slot. is there.

  FIG. 1 is a perspective view of a stator core. In FIG. 1, a stator core 10 divided into 12 parts includes insulating paper 12 disposed so as to insulate wall portions formed on both sides of the pole tooth portion of the laminated core 11, and end portions in the lamination direction of the laminated core 11. And an end insulator 13 that covers the end portion of the slot wall of the insulating paper 12, and the magnet wire 14 is concentratedly wound so as to form an insulating slot and to be orthogonal to the pole tooth portion.

  One end insulator 13 is provided with two conductive pins 15, the winding start is connected to one conductive pin 15, the magnet wire 14 is aligned and wound in an insulating slot, and the end of the winding is connected to the other conductive pin 15. 15, and finally the end of the insulating paper 12 is bent so as to wrap the magnet wire 14 to complete the stator core 10. Twelve similar stator cores 10 are annularly joined to form a stator.

  FIG. 2 is a half cross-sectional view of the pole tooth center of FIG. 1 cut in the winding direction to explain the main part, and the features of the present invention will be described.

  The feature of the first embodiment is that the slot wall portion 12a of the insulating paper 12 is set to be longer than the laminated core 11 so as to protrude on both sides, and the groove portion 13a is engaged with the slot wall portion 12a of the protruding insulating paper 12. Is provided on the end insulator 13 and the slot walls 12a on both sides are engaged with the groove portions 13a to form insulating slots, and the slot area after the formation of the insulating slots is the same as in the prior art.

When the magnet wire 14 is wound around the pole tooth portion, winding tension (tension) is applied to the magnet wire 14 in order to prevent sagging and improve the space factor by aligned winding. When the magnet wire 14 hits the curved portion (r portion) of the end insulator 13, the inner corner portion of the end insulator 12 tends to be pressed against the edge portion of the laminated iron core 11 by the winding tension.

  However, since the slot wall portion 12a of the insulating paper 12 protrudes from the end surface of the laminated core 11, the stress is relieved by the slot wall portion 12a, and deformation, cracks, and the like at the curved portion of the end insulator 12 can be prevented. .

  As described above, since the slot area does not decrease, the winding space factor can be maintained, and the small and high-power fixing in which the insulation resistance between the laminated core 11 and the magnet wire 14 is improved by the engagement of the slot wall portion 12a and the groove portion 13a. A child is obtained.

  The stator of Example 2 is obtained by bending a slot wall portion that protrudes on both sides from the thickness of the laminated core to the pole tooth side.

  FIG. 3 is a half cross-sectional view of the main part. The difference from FIG. 2 is that the slot wall portion 22a of the insulating paper 22 set longer than the stack thickness of the laminated core 21 is bent to the pole tooth side near the pole tooth center. This is the point where insulation was reinforced. Further, the groove portion is not provided in the end insulator 23, and the others are the same as in the first embodiment.

  As in the first embodiment, in order to prevent sagging of the magnet wire 24 and improve the space factor due to the aligned winding, concentrated winding is performed on the pole tooth portion while applying winding tension to the magnet wire 24. When the magnet wire 24 hits the curved portion of the end insulator 23, the corner of the inner surface of the end insulator 22 tends to be pressed against the corner of the laminated iron core 21 due to the winding tension.

  At this time, since the slot wall part 22a which bent the insulating paper 22 between the edge part of the laminated iron core 21 and the end insulator 23 acts indirectly as a buffering material, stress is relieved. Moreover, since the edge part of the laminated iron core 21 is covered and reinforced by the slot wall part 22a of the insulating paper 22, the insulation resistance can be ensured. Furthermore, the slot area after forming the insulating slot is the same as that of the first embodiment, and the winding space factor is not reduced.

  Therefore, it is possible to obtain a small and high output stator that maintains the winding space factor and improves the dielectric strength.

  The stator of the present invention is useful for a servo motor or the like that requires high dielectric strength and small high output.

The perspective view of the stator core in Example 1 of this invention The half sectional view explaining the important section in Example 1 of the present invention Half sectional view for explaining the main part in the second embodiment of the present invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Stator iron core 11,21 Laminated iron core 12,22 Insulating paper 12a, 22a Slot wall part 13,23 End insulator 13a Groove part 14,24 Magnet wire 15 Conduction pin

Claims (2)

Insulating paper that insulates slot wall portions formed on both sides of the pole tooth portion of the laminated iron core, an end insulator covering the lamination direction end portion of the laminated iron core and the slot wall end portion of the insulating paper, the insulating paper and the end A stator comprising a magnet core that is wound around a stator core insulated by an insulator, wherein the slot wall portion of the insulating paper is set so as to protrude on both sides from the thickness of the laminated core, and the end insulator The stator is characterized in that a groove portion that engages with the protruding slot wall portion is provided and concentrated winding is performed in a state where the slot wall portion is engaged with the groove portion. Insulating paper that insulates slot wall portions formed on both sides of the pole tooth portion of the laminated iron core, an end insulator covering the lamination direction end portion of the laminated iron core and the slot wall end portion of the insulating paper, the insulating paper and the end A stator wire including a magnet wire wound in a concentrated manner on a stator iron core insulated by an insulator, wherein the slot wall portion of the insulating paper is set so as to protrude on both sides from the stack thickness of the laminated iron core, and the slot wall A stator in which the vicinity of the center of the pole teeth of the portion is bent to the pole tooth side.