Pole grouping for stepping motor

Details Pole grouping for stepping motor Pole grouping for stepping motor

1989-03-28

1990-03-20

Salce, Patrick R.

Electrical generator or motor structure

Dynamoelectric

Rotary

310254, 318696, H02K 3714

Patent

active

049104756

ABSTRACT:
Hybrid stepping motor apparatus that produces a step angle of 1/K.sub.p times the pitch angle .DELTA..theta..sub.p of the stator on rotor teeth, where K.sub.p is the number of phases for the motor, using a plurality of stator poles whose center-to-center angular spacings are not uniform, and depend on the number of stator poles used. In one embodiment with M poles, the first M-1 center-to-center pole angular spacings are equal to a first angle A, and the Mth center-to-center pole angular spacing is an angle B with .vertline.A-B.vertline.=m.DELTA..theta..sub.p, where m is a positive integer.

REFERENCES:
patent: 3866104 (1975-02-01), Heine
patent: 3978356 (1976-08-01), Spiesberger
patent: 4623809 (1986-11-01), Westley
patent: 4638105 (1987-01-01), Lin
patent: 4695777 (1987-09-01), Asano
patent: 4748362 (1988-05-01), Hedlund
patent: 4754178 (1988-06-01), Kavanaugh
patent: 4758752 (1988-07-01), Leenhouts
P. P. Acarnley, "Stepping Motors", 1982, pp. 1-59, Peregrinus (IEE), N.Y.

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