Motor and method of manufacturing motor

Patent metadata

Field	Value
Publication number	US-9685844-B2
Application number	US-201414159037-A
Country	US
Kind code	B2
Filing date	Jan 20, 2014
Priority date	Mar 29, 2013
Publication date	Jun 20, 2017
Grant date	Jun 20, 2017

Abstract

A motor may include a stator having coil groups of plural phases and a connector, the stator comprising a plurality of split stators. Each of the split stators may include a split core having an arc-shaped core back section and a tooth section, an insulator, a coil which has a lead-out line that is connected to the connector. The insulator may have a first void extending between a first inner wall and a first outer wall. The first inner wall may have a lead-in groove. The stator may have a support ring disposed on the upper side of the first void. The support ring may have a second void extending between a second inner wall and a second outer wall. A plurality of lead-out lines of different phases may respectively accommodated in the first void and the second void.

First claim

What is claimed is:

1. A motor comprising:
a rotor that is supported so as to be able to rotate around an axis of rotation; and
a stator that is formed into a cylindrical shape and having coil groups of plural phases and a connector, the stator comprising a plurality of split stators,
wherein each of the split stators comprises:
a split core having an arc-shaped core back section configured to connect with an arc-shaped core back section of another split core and a tooth section which extends toward the inside in a radial direction from the core back section,
an insulator which covers the tooth section and at least a portion of the core back section,
a coil which has a lead-out line that is connected to the connector, and is wound around the tooth section with the insulator interposed therebetween, and
wherein the insulator has, at a portion which covers an upper surface in an axial direction of the core back section, a first inner wall which extends in a circumferential direction, a first outer wall which is disposed further to the outside in the radial direction than the first inner wall and extends in the circumferential direction, and a first void which extends in the circumferential direction between the first inner wall and the first outer wall,
the first inner wall has a lead-in groove recessed toward the lower side in the axial direction, at an upper surface in the axial direction,
the stator further has a support ring which is disposed on the upper side in the axial direction of the first void,
the support ring has a bottom portion which extends in the circumferential direction, a second inner wall which extends in the circumferential direction on an upper surface in the axial direction of the bottom portion, a second outer wall which is disposed further to the outside in the radial direction than the second inner wall and extends in the circumferential direction, and a second void which extends in the circumferential direction between the second inner wall and the second outer wall,
a plurality of lead-out lines of different phases is respectively accommodated in the first void and the second void,
the lead-out line which is accommodated in the first void is accommodated in the first void through the lead-in groove from the coil;
a distance between an inner edge of the bottom portion and the first inner wall is smaller than a wire diameter of the lead-out line;
wherein the support ring has an intermediate wall between the second outer wall and the second inner wall and further on the outside in the radial direction than the second void, and a third void which extends in the circumferential direction between the intermediate wall and the second outer wall,
the lead-out line of a phase different from phases of the lead-out lines accommodated in the first void and the second void passes through the lead-in groove and the lead-out groove, is led out further to the outside in the radial direction than the first void along an outside of the second outer wall, and then accommodated in the third void from the outside in the radial direction; and
the lead-out line which is accommodated in the second void is provided along the second inner wall of the support ring.

2. The motor according to claim 1 , wherein the first void is filled with resin.

3. The motor according to claim 1 , wherein the first outer wall has a lead-out groove recessed toward the lower side in the axial direction, at an upper surface in the axial direction,
the lead-out line which is accommodated in the first void is discharged to the outside in the radial direction through the lead-out groove, and
at least a portion of an opening on the upper side in the axial direction of the lead-out groove is covered by a lower surface of the bottom portion.

4. The motor according to claim 1 , wherein the first inner wall has a protrusion portion which protrudes toward the outside in the radial direction in the vicinity of the lead-in groove, and
the lead-out line which is accommodated in the first void is disposed on the lower side in the axial direction of the protrusion portion.

5. The motor according to claim 4 , wherein a gap that is larger than a wire diameter of the lead-out line is present between the protrusion portion and the first outer wall.

6. The motor according to claim 4 , wherein the second outer wall has an outer groove recessed toward the inside in the radial direction, at an outer surface in the radial direction, and
the lead-out line which is accommodated in the third void enters the third void through the outer groove.

7. The motor according to claim 6 , wherein a circumferential position of the outer groove is the same as a circumferential position of the lead-out groove.

Assignees

• Nidec Corp

Inventors

• Nakamura Yoshinobu
• Kawai Yoshiki
• Makino Yusuke
• Yamada Yosuke

Classifications

• H02K15/12

  Impregnating, moulding insulation, heating or drying of windings, stators, rotors or machines · CPC title

• H02K15/026 Primary

  Wound cores · CPC title

• Y10T29/49009

  Dynamoelectric machine · CPC title

• H02K2203/09

  Machines characterised by wiring elements other than wires, e.g. bus rings, for connecting the winding terminations · CPC title

• H02K2203/12

  Machines characterised by the bobbins for supporting the windings · CPC title