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US 6,181,046 B2Granted
Dynamo-electric machine with commutator assembly
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorsAkihiro Daikoku, Shigekazu Sakabe, Toshinori Tanaka, Ryuichi Ikeda, Yuji Nakahara, Kyouhei Yamamoto
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Abstract
A commutator assembly for an electric motor includes a commutator having commutator segments arranged circumferentially, brushes contacting the commutator segments, and an equalizer connecting commutator segments so they have the same electric potential, the equalizer including printed circuit boards with insulating substrates and a connecting plate having an electrically conducting film on the insulating substrate, electrically connected to the commutator segments.
Claims9
A dynamo-electric machine comprising:
- a rotor including a rotor core having slots and rotor windings wound in the slots;
- a commutator having a plurality of commutator segments arranged circumferentially upon said commutator;
- brushes contacting at least one pair of said commutator segments;
- and
- an equalizer connecting respective pairs of said commutator segments so that the pairs of said commutator segments have substantial identical electrical potentials, wherein said equalizer includes a printed circuit board comprising an insulating substrate and a connecting plate having a conducting film on said insulating substrate, said conducting film being directly electrically connected to at least one of the pairs of said commutator segments having substantially identical electrical potentials but not being directly connected to said rotor windings.
2 more elements
Dependencies are inferred from the claim text.