Stator with nonuniformly spaced teeth for rotating electromagnet

Details Stator with nonuniformly spaced teeth for rotating electromagnet Stator with nonuniformly spaced teeth for rotating electromagnet

1983-09-29

1985-05-07

Budd, Mark O.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 49R, 310156, H02K 112

Patent

active

045160481

ABSTRACT:
An electromagnetic device of the type having a rotor and a stator with magnetically coacting peripheries, with the stator having toothed pole structures, has the stator pole teeth set at nonuniform spacing to improve the operating characteristics of the device. When the device is a stepping motor, improved step accuracy is attained through reduction of residual (or detent) torque. Reduction of airborne noise is reduced in all motor types.

REFERENCES:
patent: 3482156 (1969-12-01), Porath
patent: 3866104 (1975-02-01), Heine
patent: 4081703 (1978-03-01), Madsen et al.
patent: 4112319 (1978-09-01), Field
patent: 4385247 (1983-05-01), Satomi
patent: 4385250 (1983-05-01), Welburn
patent: 4423343 (1983-12-01), Field

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