Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1993-04-23
1994-07-19
Stephan, Steven L.
Electrical generator or motor structure
Dynamoelectric
Rotary
310 49R, H02K 1512
Patent
active
053312376
ABSTRACT:
A small-sized stepping motor provided with can-type stator yokes and one flat-type stator yoke, all of which are injection molded of a composite powder (i.e., a mixture of a metal powder of a soft magnetic material, a powder of a thermoplastic synthetic resin). The injection molded stator yokes have a considerably large specific electrical resistance, and the stepping motor is free from various disadvantages resulting from a small specific electric resistance.
REFERENCES:
patent: 4392072 (1983-07-01), Rosenberry
patent: 4501984 (1985-02-01), Mishima
patent: 4841190 (1989-06-01), Matsushita et al.
patent: 4990806 (1991-02-01), Kikuchi et al.
patent: 5121017 (1992-06-01), Yamamoto et al.
patent: 5121021 (1992-06-01), Ward
Minebea Kabushiki -Kaisha
Nguyen Matthew
Stephan Steven L.
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