Means to reduce harmonic torque in electromagnetic machines

Details Means to reduce harmonic torque in electromagnetic machines Means to reduce harmonic torque in electromagnetic machines

1986-07-25

1988-04-19

Duggan, Donovan F.

Electrical generator or motor structure

Dynamoelectric

Rotary

310156, 310112, H02K 3700

Patent

active

047392010

ABSTRACT:
An electromagnetic machine of the type having a moving member and a stationary member, with a set of structures on the moving member to magnetically interact with a set of structures on the stationary member, has an improved construction comprising displacing by an angle of displacement, .alpha..sub.m, from their normal positions, a first portion of one set of structures whereby the displacement causes a harmonic of the fundamental torque/angle curve to be attenuated. The angle of displacement is determined by the following relationship:

REFERENCES:
patent: 3956650 (1976-05-01), Field, II
patent: 4127802 (1978-11-01), Johnson
patent: 4206374 (1980-06-01), Goddijn
patent: 4255696 (1981-03-01), Field, II
patent: 4306164 (1981-12-01), Itoh et al.
patent: 4327299 (1982-04-01), Goddijn

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