Motor, and electric power steering apparatus and vehicle equipped with the same

Patent metadata

Field	Value
Publication number	US-10218241-B2
Application number	US-201515323231-A
Country	US
Kind code	B2
Filing date	Jun 29, 2015
Priority date	Jun 30, 2014
Publication date	Feb 26, 2019
Grant date	Feb 26, 2019

Abstract

A motor having a configuration that includes plural openings which are disposed in a circumferential direction on a case bottom surface and are pulled-out bus bar terminals, and is directly connected between a control board and bus bars by using a simple procedure, and to an electric power steering apparatus and a vehicle equipped with the motor. The outer periphery of the motor is enclosed in a case and wirings are implemented at an anti-load side. The motor has a configuration that includes plural openings which are provided in a circumferential direction on a case bottom surface at the anti-load side and allow bus bar terminals to protrude therefrom, and openings which have an almost same shape of the plural openings and are disposed at a predetermined interval in a similar shape are added as needed.

First claim

The invention claimed is:

1. A motor that an outer periphery is enclosed in a case and wirings are implemented at an anti-load side, comprising:
a configuration in which plural openings having an elliptical shape are provided in a circumferential direction on a case bottom surface at said anti-load side in a same interval,
a part of said plural openings having the elliptical shape are provided for protruding bus bars of motor windings and others of said plural openings having the elliptical shape are provided for being utilized as threaded holes,
said plural openings having the elliptical shape are a similar shape and are not contacted with said bus bars,
plural protrusions are provided in a circumferential direction on an axial end inside of an outer periphery of an insulator,
said insulator comprises plural notch sections which are cutouts disposed between said neighbor protrusions,
said motor comprises a bus bar structure which is provided at one side of a motor stator and is opposed to an axial end inside of an outer periphery of an insulator, and
engagement sections, which are provided on a circumferential side surface of said bus bar structure, are engaged with said notch sections, and
an insulating cap or an insulating film to cover said case is provided to insulate between said case and said bus bars.

2. The motor according to claim 1 , wherein said motor windings are a dual-system and said bus bars are connected to said dual-system motor windings.

3. The motor according to claim 2 , wherein bus bar positions of said dual-system motor windings are arranged in diagonal positions with respect to a center and said openings are provided corresponding to said arrangement of said bus bars.

4. The motor according to claim 3 , wherein a cylindrical recess coupled to a rotational position detecting means is provided on a bottom surface of said case, a number for said openings is a number which is added at least two or more to a number for said bus bars, and said at least two or more openings which are not used for said bus bars are utilized as threaded holes.

5. The motor according to claim 2 , wherein bus bar positions of said dual-system motor windings are sequentially arranged in an order of a system and said openings are provided corresponding to said arrangement of said bus bars.

6. The motor according to claim 5 , wherein a cylindrical recess coupled to a rotational position detecting means is provided on a bottom surface of said case, a number for said openings is a number which is added at least two or more to a number for said bus bars, and said at least two or more openings which are not used for said bus bars are utilized as threaded holes.

7. The motor according to claim 2 , wherein a cylindrical recess coupled to a rotational position detecting means is provided on a bottom surface of said case, a number for said openings is a number which is added at least two or more to a number for said bus bars, and said at least two or more openings which are not used for said bus bars are utilized as threaded holes.

8. The motor according to claim 1 , wherein threaded holes for being fixed to a rotational position sensor are provided on said insulating cap by tapping thereon.

9. An electric power steering apparatus that is driving-controlled by said motor according to claim 1 , and applies an assist force to a steering system of a vehicle by means of a current command value calculated based on at least a steering torque.

10. A vehicle which is equipped with said electric power steering apparatus according to claim 9 .

Assignees

• Nsk Ltd

Inventors

• Nakamura Kozue
• Asada Toshiaki
• Kikuchi Yusuke

Classifications

• H02K3/522

  for generally annular cores with salient poles · CPC title

• H02K2213/12

  Machines characterised by the modularity of some components · CPC title

• H02K3/28

  Layout of windings or of connections between windings (windings for pole-changing H02K17/06, H02K17/14, H02K19/12, H02K19/32) · CPC title

• H02K29/12

  using detecting coils {using the machine windings as detecting coil} · CPC title

• H02K5/225 Primary

  Terminal boxes or connection arrangements (specially adapted for submersible motors H02K5/132) · CPC title