Rotor of rotary electric machine and manufacturing method thereof

Patent metadata

Field	Value
Publication number	US-9825505-B2
Application number	US-201214422904-A
Country	US
Kind code	B2
Filing date	Dec 3, 2012
Priority date	Dec 3, 2012
Publication date	Nov 21, 2017
Grant date	Nov 21, 2017

Abstract

In a rotor of a rotary electric machine including a pair of gutter-shaped concave portions which are formed along a side surface positioned at the outside of an axis of field-magnet core components so as to install and protect a pair of lead wires, balance-correction concave portions formed by a molding die are provided at shoulders of claw-shaped magnetic poles being nearest to the gutter-shaped concave portions in claw-shaped magnetic poles arranged at positions which are evenly separated at least in a circumferential direction with respect to the pair of gutter-shaped concave portions.

First claim

What is claimed is:

1. A rotor of a rotary electric machine, comprising:
a field-magnet coil for generating a magnetic flux;
a pair of field-magnet core components which include a plurality of claw-shaped magnetic poles and support the field-magnet coil around a rotational shaft in such a way that the field-magnet coil is installed to an inner diameter side of the claw-shaped magnetic poles;
a slip ring assembly which supplies a magnetic field current from the outside of the rotor to the field-magnet coil;
a pair of lead wires which are led from the field-magnet coil to connect to the slip ring assembly; and
a pair of gutter-shaped concave portions which are formed along a side surface positioned at the outside of an axis of the field-magnet core components so as to install and protect the pair of lead wires; wherein
balance-correction concave portions formed by a molding die are provided at shoulders of the claw-shaped magnetic poles being nearest to positions which are evenly separated at least in a circumferential direction with respect to the pair of gutter-shaped concave portions, a volume and position of the balance-correction concave portions is configured to balance only a volume occupied by the pair of gutter-shaped concave portions.

2. A rotor of the rotary electric machine as recited in claim 1 , wherein the gutter-shaped concave portions are provided at two positions in a substantially diametrical direction in a state where the rotary shaft is sandwiched by the gutter-shaped concave portions, and the balance-correction concave portions formed by the molding die are provided at two positions.

3. A rotor of the rotary electric machine as recited in claim 1 , wherein the balance-correction concave portions formed by the molding die are provided at all shoulders of the plurality of claw-shaped magnetic poles, and the balance-correction concave portions, which are provided at shoulders of the claw-shaped magnetic poles being nearest to positions which are evenly separated in a circumferential direction with respect to the pair of gutter-shaped concave portions, are larger than the other balance-correction concave portions provided at the other shoulders.

4. A rotor of the rotary electric machine as recited in claim 1 , wherein the balance-correction concave portions formed by the molding die are provided at all shoulders of the plurality of claw-shaped magnetic poles, and a plurality of balance-correction concave portions are provided only at shoulders of the claw-shaped magnetic poles being nearest to positions which are evenly separated in a circumferential direction with respect to the pair of gutter-shaped concave portions, and one balance-correction concave portion is provided at each of the other shoulders, and all balance-correction concave portions have a substantially identical shape.

5. A manufacturing method of the rotor of the rotary electric machine according to claim 1 , wherein the balance-correction concave portions formed by the molding die are used for positioning a tool when an imbalance correction of the rotor is processed.

Assignees

• Tanaka Kazunori
• Morita Ryuzo
• Mitsubishi Electric Corp

Inventors

• Tanaka Kazunori
• Morita Ryuzo

Classifications

• H02K1/243

  of the claw-pole type · CPC title

• H02K7/04 Primary

  Balancing means · 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

• H02K3/528

  of the claw-pole type · CPC title