ROTATING ELECTRIC MACHINE

• US 20140070643A1
• Filed: 02/08/2013
• Published: 03/13/2014
• Est. Priority Date: 09/13/2012
• Status: Active Grant

• Current Assignee: Mitsubishi Electric Corporation
• Original Assignee: Masahiko Fujita, Naohiro Motoishi, Yoshinobu Utsumi
• Inventors: FUJITA, Masahiko, UTSUMI, Yoshinobu, MOTOISHI, Naohiro
• Granted Patent: US 9,413,209 B2
• Time in Patent Office: Days
• US Class Current: 310/64
• CPC Class Codes: H02K 11/05 Rectifiers associated with casings, enclosures or brackets
• CPC Class Codes: H02K 11/225 Detecting coils
• CPC Class Codes: H02K 9/227 Heat sinks

Abstract

A rotating electric machine including: a bracket holding a rotor and a stator of a motor; a heat sink provided fixedly to the bracket on an outside of the bracket; a resolver disposed between the heat sink and the motor; a stator circuit portion and a field circuit portion disposed to the heat sink on a side opposite to the resolver; and a control board supported on an insert case attached to the heat sink and electrically connected to the stator circuit portion and the field circuit portion. A resolver input-output terminal is electrically connected to the control board by passing through an insertion hole provided to the heat sink. The rotating electric machine configured in this manner is compact and inexpensive with an excellent heat-releasing performance and a capability of reducing man-hours required for assembly and components required for connection.

Claims

1. A rotating electric machine, comprising:

a bracket holding a rotor and a stator of a motor;

a heat sink provided fixedly to the brackets on an outside of the bracket;

a resolver formed of a resolver rotor disposed to a rotation shaft of the motor between the heat sink and the motor and a resolver stator surrounding the resolver rotor, and detecting a magnetic pole position of the rotor;

a stator circuit portion and a field circuit portion disposed to the heat sink on a surface opposite to the resolver; and

a control board held on a side of the heat sink opposite to the resolver by an insert case attached to the heat sink and electrically connected to the stator circuit portion and the field circuit portion,

wherein a resolver input-output terminal of the resolver is electrically connected to the control board by passing through an insertion hole provided to the heat sink.

2. The rotating electric machine according to claim 1, wherein:

the resolver stator is fixed to the heat sink via a resolver holding member made of an insulator and holding the resolver stator.

3. The rotating electric machine according to claim 2, wherein:

the resolver stator is fixed to the heat sink with a screw using an attachment hole provided to the resolver holding member.

4. The rotating electric machine according to claim 2, wherein:

a resolver input-output terminal holding portion in which is inserted the resolver input-output terminal is formed integrally with resolver holding member and a part of the resolver input-output terminal holding portion is fit into the insertion hole.

5. The rotating electric machine according to claim 4, wherein:

a space between the insertion hole and the resolver input-output terminal holding portion is sealed using a sealing member.

6. The rotating electric machine according to claim 5, wherein:

a sealing member reservoir portion is provided to the insertion hole on a side of the control board.

7. The rotating electric machine according to claim 1, wherein:

the control board is inserted into the insert case attached to the heat sink using a potting member.