Motor

Details Motor Motor

1990-07-20

1991-02-19

Stephan, Steven L.

Electrical generator or motor structure

Dynamoelectric

Rotary

310154, 310261, 310 49R, H02K 112

Patent

active

049947028

ABSTRACT:
A motor includes a field magnet system comprised of plural permanent magnetic poles arranged in a circle and an armature with plural poles each facing the magnetic poles of the field magnetic system. The widthwise length of a magnetic flux generating area of the permanent magnetic poles varies with the rotational angle to eliminate a cogging torque caused by higher harmonic wave components of the magnetic flux.

REFERENCES:
patent: 4868438 (1989-09-01), Okamoto et al.
patent: 4891538 (1990-01-01), Oudet
patent: 4897570 (1990-01-01), Ishikawa et al.
patent: 4899074 (1990-02-01), West
patent: 4935655 (1990-06-01), Ebner
patent: 4945330 (1990-07-01), Arita
patent: 4949000 (1990-08-01), Petersen

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