D.C. motors with unequal pole spacing

Details D.C. motors with unequal pole spacing D.C. motors with unequal pole spacing

1985-12-27

1987-10-13

Salce, Patrick R.

Electrical generator or motor structure

Dynamoelectric

Rotary

310156, H02K 108

Patent

active

047000988

ABSTRACT:
A rotary electric apparatus comprising a field magnet having different magnetic poles arranged alternately on a circumferential surface, an armature including an armature core having slots formed therein as distributed on a circumferential surface opposed to the magnetic circumferential surface, to provide salient poles between the slots, each of the salient poles having an armature winding wound therearound, and a shaft supporting either the armature or the field magnet rotatably, relative to the other. The magnetic poles of the field magnet or the slots of the armature core are formed at unequal spacings determined by some equations, so that positions where cogging occurs can be distributed.

REFERENCES:
patent: 3215875 (1965-11-01), Latta
patent: 3374410 (1968-03-01), Cronquist et al.
patent: 3885302 (1975-05-01), Boesel
patent: 4357563 (1982-11-01), Ohno
patent: 4451752 (1984-05-01), Tahara
patent: 4644233 (1987-02-01), Suzuki

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