Electric drive apparatus

Patent metadata

Field	Value
Publication number	US-9627944-B2
Application number	US-201214410923-A
Country	US
Kind code	B2
Filing date	Oct 1, 2012
Priority date	Oct 1, 2012
Publication date	Apr 18, 2017
Grant date	Apr 18, 2017

Abstract

Provided is an electric drive apparatus in which a detected portion ( 10 ) of a rotation angle sensor is disposed at an end of a shaft ( 7 ) of a motor, and a sensor portion ( 300 ) as a detection portion of the rotation angle sensor is disposed coaxially with the rotating axis of the shaft. In a control unit ( 200 ), an inverter circuit portion with a drive element (SW) for driving the motor, and a control substrate ( 17 ) which is separate from the sensor portion and controls the output of the inverter circuit portion are disposed. The sensor portion and the control substrate are electrically connected, with the control substrate disposed along a plane perpendicular to the rotating axis of the shaft.

First claim

The invention claimed is:

1. An electric drive apparatus equipped with a motor and a control unit serving as a drive device portion disposed on the opposite side to the output axis side of said motor, said electric drive apparatus comprising:
a detected portion of a rotation angle sensor, said detected portion being disposed at an end of a shaft on the opposite side to the output axis side of said motor; and
a sensor portion serving as a detection portion of said rotation angle sensor, said sensor portion being disposed at a position coaxially with the rotating axis of said shaft,
said control unit including: an inverter circuit portion having a drive element which is attached to a heat sink and is for driving said motor; and a control substrate which is separate from said sensor portion and controls the output of said inverter circuit portion; and
said sensor portion and said control substrate being electrically connected and the arrangement of said control substrate being disposed along a plane perpendicular to the rotating axis of said shaft of said motor.

2. The electric drive apparatus according to claim 1 ,
wherein said sensor portion has a substrate;
said substrate is mounted with a magnetic sensor;
said substrate is provided with a connection member to be electrically connected to said control substrate and said sensor portion, and a supporting member to be integrated with said connection member; and
said connection member passes through said inverter circuit portion.

3. The electric drive apparatus according to claim 1 ,
wherein said sensor portion is disposed on a heat sink of said inverter circuit portion and is disposed on the motor side when viewed from said heat sink.

4. The electric drive apparatus according to claim 1 ,
wherein said sensor portion is electrically connected to said control substrate directly.

5. The electric drive apparatus according to claim 1 ,
further comprising an intermediate member disposed between said heat sink and said control substrate, and
wherein electrical connection between said sensor portion and said control substrate is positioned by said intermediate member.

6. The electric drive apparatus according to claim 5 ,
wherein said intermediate member is configured so that a first connection member to be electrically connected to said sensor portion and a second connection member to be electrically connected to said control substrate are integrated.

7. The electric drive apparatus according to claim 1 ,
wherein press-fitting is used for electrical connection between said sensor portion and said control substrate.

8. The electric drive apparatus according to claim 1 ,
wherein said detected portion has a permanent magnet;
said sensor portion has a magnetic sensor; and
said magnetic sensor is disposed at a position facing said permanent magnet.

9. The electric drive apparatus according to claim 8 ,
wherein said permanent magnet is magnetized in two poles and a magnetized direction is formed on a flat plane perpendicular to the rotating axis of said shaft.

10. The electric drive apparatus according to claim 8 ,
wherein said sensor portion has a substrate; and
said substrate is disposed such that at least one surface of said substrate is mounted with said magnetic sensor and the other side of said substrate is also mounted with a component.

11. The electric drive apparatus according to claim 8 ,
wherein said sensor portion has a substrate; and
said substrate is disposed such that at least two magnetic sensors are mounted on both surfaces of said substrate at positions coaxially with the rotating axis of said shaft.

12. The electric drive apparatus according to claim 1 ,
wherein said sensor portion has a substrate;
said substrate is mounted with a magnetic sensor; and
said substrate is fixed to said heat sink by screw-fastening.

13. The electric drive apparatus according to claim 1 ,
further comprising a magnetic shield disposed between said sensor portion and said heat sink.

14. The electric drive apparatus according to claim 1 ,
wherein said detected portion of said rotation angle sensor has a protruded portion and is configured by a rotor for a sensor, said rotor having magnetism; and
said sensor portion is a resolver which is configured by a coil composed of an excitation winding an output winding and a stator for a sensor, said stator having core.

Assignees

• Nakano Masatsugu
• Akutsu Satoru
• Sonoda Isao
• Ushio Kohei
• Asao Yoshihito
• Mitsubishi Electric Corp

Inventors

• Nakano Masatsugu
• Akutsu Satoru
• Sonoda Isao
• Ushio Kohei
• Asao Yoshihito

Classifications

• H02K2211/03

  Machines characterised by circuit boards, e.g. pcb · CPC title

• H02K29/08 Primary

  using magnetic effect devices, e.g. Hall-plates, magneto-resistors (H02K29/12 takes precedence) · CPC title

• H02K11/33 Primary

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

• H02K11/215

  Magnetic effect devices, e.g. Hall-effect or magneto-resistive elements · CPC title

• H02K11/0021 Primary

  Electricity · mapped topic