Pole-amplitude modulation, pole-changing electric motors and gen

Details Pole-amplitude modulation, pole-changing electric motors and gen Pole-amplitude modulation, pole-changing electric motors and gen

1980-04-09

1982-07-06

Skudy, R.

Electrical generator or motor structure

Dynamoelectric

Rotary

310198, 318773, H02K 300

Patent

active

043385346

ABSTRACT:
A pole-amplitude modulation (P.A.M.) three-phase, pole-number changing machine having star-connected and delta-connected stator winding components, thereby providing additional means for reducing m.m.f. harmonics in the resultant three-phase field. Pole-number changing is effected by reversing the star-connected winding component relatively to the delta-connected component.
A design method defines relationships between alternative pole-numbers and stator slot number, and slot-spacing between star- and delta-connected components.

REFERENCES:
patent: 3070734 (1962-12-01), Rawcliffe
patent: 4075543 (1978-02-01), Uyen
patent: 4138619 (1979-02-01), Broadway
patent: 4144470 (1979-03-01), Avinger

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