Commutator for a dynamo-electric machine and method of manufacture therefor
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorsToshinori Tanaka, Ryuichi Ikeda, Akihiro Daikoku, Yuji Nakahara, Nobuaki Miyake, Kyouhei Yamamoto
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Abstract
A commutator for a dynamo-electric machine according to the present invention comprises a cylindrical commutator main body provided with a plurality of commutator segments disposed around the circumference thereof, an equalizer assembly disposed inside the commutator main body provided with equalizer segments electrically connecting commutator segments which are to have the same electric potential, and an insulating resin portion disposed within the space inside the commutator main body integrating the commutator main body and the equalizer assembly.
Claims11
A commutator for a dynamo-electric machine comprising:
- a cylindrical commutator main body provided with a plurality of commutator segments disposed around the circumference thereof;
- an equalizer assembly disposed inside said commutator main body provided with at least one equalizer segment electrically connecting commutator segments which are to have the same electric potential;
- and
- an insulating resin portion disposed within a space inside said commutator main body integrating said commutator main body and said equalizer assembly.
A method of manufacturing a commutator for a dynamo-electric machine comprising a cylindrical commutator main body provided with a plurality of commutator segments disposed around the circumference thereof, an equalizer assembly disposed inside said commutator main body provided with equalizer segments electrically connecting commutator segments which are to have the same electric potential, and an insulating resin portion disposed within a space inside said commutator main body integrating said commutator main body and said equalizer assembly,
- said method of manufacturing comprising:
- forming an equalizer main body by integrating a plurality of said equalizer segments in advance in a premolded portion composed of insulating resin;
- inserting said equalizer main body inside a cylindrical drum body;
- filling a space between said drum body and said equalizer main body with insulating resin;
- and
- forming a plurality of commutator segments by making longitudinal cuts at an even pitch around the circumference of said drum body.
Dependencies are inferred from the claim text.