Permanent-magnetic motor having anti-cogging structure

Details Permanent-magnetic motor having anti-cogging structure Permanent-magnetic motor having anti-cogging structure

1990-08-02

1992-04-14

Stephan, Steven L.

Electrical generator or motor structure

Dynamoelectric

Rotary

H02K 2130

Patent

active

051051133

ABSTRACT:
A permanent-magnetic motor employs a skew structure in an armature iron core and an equal gap structure. A center line of a permanent magnet field pole is disposed to be shifted against a mechanical center line of the motor or a center line of the iron core. The magnet field pole is made to have an unequal pitch. A cogging torque generated at both end extending portions in the magnets is cancelled out. The cogging torque of the permanent-magnetic motor in power steering assistance such as for the automobile yields a smooth steering feeling sensitivity during the operation of the automobile.

REFERENCES:
patent: 4556809 (1985-12-01), Beisse et al.
patent: 4713569 (1987-12-01), Schwartz
patent: 4748359 (1988-05-01), Yahara et al.
patent: 4774426 (1988-09-01), Mohr et al.
patent: 4935655 (1990-06-01), Ebner

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