Apparatus for minimizing magnetic cogging in an electrical machi

Details Apparatus for minimizing magnetic cogging in an electrical machi Apparatus for minimizing magnetic cogging in an electrical machi

1981-05-27

1984-01-03

Miller, J. D.

Electrical generator or motor structure

Dynamoelectric

Rotary

310186, H02K 316

Patent

active

044244630

ABSTRACT:
An apparatus which reduces magnetic cogging between a rotor and stator of an electrical motor or generator. The stator is divided into pairs of angular pie-shaped segments, one member of each pair being shifted angularly with respect to the other member of the pair a distance equal to one-half of one pole pitch. This places the teeth of a shifted stator segment between the alternating magnetic poles of the rotor while the teeth of the unshifted segment are directly opposite the poles. When the rotor is moved, the reluctance torque, or magnetic cogging due to one member of a pair, virtually cancels the reluctance torque of the other member of the pair.

REFERENCES:
patent: 3604961 (1970-02-01), Saldinger
patent: 3860843 (1975-01-01), Kawasaki et al.
patent: 4234808 (1980-11-01), Geppert et al.
patent: 4315171 (1982-02-01), Schaeffer
patent: 4347457 (1982-08-01), Sakamoto

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