Electric motor and electric pump

Patent metadata

Field	Value
Publication number	US-10128720-B2
Application number	US-201314655480-A
Country	US
Kind code	B2
Filing date	Dec 25, 2013
Priority date	Dec 28, 2012
Publication date	Nov 13, 2018
Grant date	Nov 13, 2018

Abstract

This electric motor includes: a brushless motor (20); and a control device (50) that is coupled integrally to an end of a motor case (11) in an axial direction. The control device (50) includes: a bus bar unit main body (53) that has a base unit (54) with a plurality of bus bars wired thereinside and has a connector unit (58) provided integrally on the base unit (54) and led out to an outside of a housing (10); a motor drive unit (66) that drives the brushless motor (20); and a motor control unit (71) that controls the motor drive unit (66). The motor drive unit (66) is attached to a first main surface (51) of the base unit (54) while the motor control unit (71) is attached to a second main surface (52) of the base unit (54).

First claim

The invention claimed is:

1. An electric motor, comprising:
a motor unit comprising a stator and a rotor, the stator being provided inside a motor case constituting a part of a housing, and the rotor being pivotally supported in a rotatable manner inside the stator in a radial direction; and
a control device that is coupled integrally to an end of the motor case in an axial direction,
wherein the control device comprises: a bus bar unit main body that has a base unit with a plurality of bus bars wired thereinside and has a connector unit provided integrally on the base unit;
a motor drive unit that drives the motor unit and
a motor control unit that controls the motor drive unit, and

wherein the motor drive unit is attached to a first surface of the base unit in the axial direction, and the motor control unit is attached to a second surface of the base unit in the axial direction,
wherein the housing has a through-hole provided at a position corresponding to the connector unit, and
wherein the connector unit is provided integrally on either one of the first surface and the second surface of the base unit, and is also erected along the axial direction and is led out to an outside of the housing through the through-hole.

2. The electric motor according to claim 1 ,
wherein, on the base unit, a seal face is formed around a base end of the connector unit,
wherein the connector unit is let out to the outside of the housing through the through-hole, and
wherein, between the seal face and the housing, a sealing member arranged annularly around the connector unit is sandwiched.

3. The electric motor according to claim 2 ,
wherein, on an outside of the sealing member of the base unit, fixation devices for fixing the bus bar unit main body to the housing are provided, and
wherein the fixation devices are uniformly arranged around the connector unit.

4. The electric motor according to claim 1 ,
wherein, on a surface opposite to the connector unit across the base unit, a noise prevention element that constitutes the control device is provided.

5. The electric motor according to claim 1 ,
wherein, at an end of the motor case on a first side in the axial direction, a control device disposition section for attachment of the control device is provided,
wherein a cover member, which constitutes a part of the housing and covers the control device disposition section from the first side in the axial direction, is comprised,
wherein, on the control device disposition section, a flange section that extends externally in the radial direction, is provided
wherein the connector unit is erected along the axial direction from the second surface of the base unit in the axial direction,
wherein, in the flange section, the through-hole is formed, and
wherein the connector unit is led out to the outside of the housing through the through-hole.

6. The electric motor according to claim 1 ,
wherein, at an end of the motor case on a first side in the axial direction, a control device disposition section for attachment of the control device is provided,
wherein a cover member, which constitutes a part of the housing and covers the control device disposition section from the first side in the axial direction, is comprised,
wherein the connector unit is erected along the axial direction from the first surface of the base unit in the axial direction,
wherein, in the cover member, the through-hole is formed, and
wherein the connector unit is led out to the outside of the housing through the through-hole.

7. The electric motor according to claim 5 ,
wherein the cover member is made of a metal material, and
wherein the motor drive unit is connected to the cover member.

8. The electric motor according to claim 1 ,
wherein a pump unit is coupled integrally to an end of the motor case on a second side in the axial direction to form an electric pump, and
wherein the electric motor functions as a drive source of the electric pump.

9. The electric motor according to claim 2 ,
wherein, at an end of the motor case on a first side in the axial direction, a control device disposition section for attachment of the control device is provided,
wherein a cover member, which constitutes a part of the housing and covers the control device disposition section from the first side in the axial direction, is comprised,
wherein, on the control device disposition section, a flange section that extends externally in the radial direction, is provided
wherein the connector unit is erected along the axial direction from the second surface of the base unit in the axial direction,
wherein, in the flange section, the through-hole is formed, and
wherein the connector unit is led out to the outside of the housing through the through-hole.

10. The electric motor according to claim 3 ,
wherein, at an end of the motor case on a first side in the axial direction, a control device disposition section for attachment of the control device is provided,
wherein a cover member, which constitutes a part of the housing and covers the control device disposition section from the first side in the axial direction, is comprised,
wherein, on the control device disposition section, a flange section that extends externally in the radial direction, is provided
wherein the connector unit is erected along the axial direction from the second surface of the base unit in the axial direction,
wherein, in the flange section, the through-hole is formed, and
wherein the connector unit is led out to the outside of the housing through the through-hole.

11. The electric motor according to claim 2 ,
wherein, at an end of the motor case on a first side in the axial direction, a control device disposition section for attachment of the control device is provided,
wherein a cover member, which constitutes a part of the housing and covers the control device disposition section from the first side in the axial direction, is comprised,
wherein the connector unit is erected along the axial direction from the first surface of the base unit in the axial direction,
wherein, in the cover member, the through-hole is formed, and
wherein the connector unit is led out to the outside of the housing through the through-hole.

12. The electric motor according to claim 3 ,
wherein, at an end of the motor case on a first side in the axial direction, a control device disposition section for attachment of the control device is provided,
wherein a cover member, which constitutes a part of the housing and covers the control device disposition section from the first side in the axial direction, is comprised,
wherein the connector unit is erected along the axial direction from the first surface of the base unit in the axial direction,
wherein, in the cover member, the through-hole is formed, and
wherein the connector unit is led out to the outside of the housing through the through-hole.

13. The electric motor according to claim 6 ,
wherein the cover member is made of a metal material, and
wherein the motor drive unit is connected to the cover member.

14. The electric motor according to claim 1 ,
wherein a pump unit is coupled integrally to an end of the motor case on a second side in the axial direction to form an electric pump, and
wherein the electric motor functions as a drive source of the electric pump.

15. The electric motor according to claim 2 ,
wherein a pump unit is coupled integrally to an end of the motor case on a second side in the axial direction to form an electric pump, and
wherein the electric motor functions as a drive source of th

Assignees

• Mitsuba Corp

Inventors

• Ishizeki Masaki
• Shindo Yoichi
• Shibuya Shinji
• Hirota Ken
• Takahashi Atsushi
• Masuyama Yuzuru
• Iijima Tomoo
• Yamamoto Ken
• Sadakata Nobuyasu
• Enkaku Shigeyuki

Classifications

• H02K5/22

  Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes · CPC title

• H02K11/33

  Drive circuits, e.g. power electronics (H02K11/38 takes precedence) · CPC title

• F04C2240/803

  Electric connectors or cables; Fittings therefor · CPC title

• F04C2240/808

  Electronic circuits (e.g. inverters) installed inside the machine · CPC title

• F04C15/008

  Prime movers · CPC title