Pole change type motor

Details Pole change type motor Pole change type motor

1981-12-16

1983-09-06

Duggan, Donovan F.

Electrical generator or motor structure

Dynamoelectric

Rotary

310185, 310198, H02K 300

Patent

active

044031602

ABSTRACT:
A pole change type motor has armature windings wound around an iron core in a coaxial fashion with a P (for example 2) number of poles for a high speed operation, which armature windings provide a Q (for example 20) number of poles for a low speed operation by changing the external connections of the windings. Each phase coil of the armature windings is segmented into N (for example P, the same number as the poles) portions, a one-pole portion of each phase coil being comprised of a plurality (for example 2) of coils. The plurality of coils include one or more coils of which polarity is changed by changing the external connections of the armature coils and one or more second coils alternately disposed with respect to the first coils, of which the polarity is left unchanged by changing the external connections.

REFERENCES:
patent: 4138619 (1979-02-01), Broadway et al.
patent: 4144470 (1979-03-01), Acingev
patent: 4338534 (1982-07-01), Broadway et al.
The Institution of Electrical Engineers, Paper No. 33064, Dec.'60 pp. 513-528; Speed-Changing Induction Motors, G. H. Rawcliffe et al.
PROC.I.E.E., vol. 110, No. 9, Sep. 1963, pp. 1649-1655; Three-Speed Single-Winding Squirrel-Cage Induction Motors, W. Fong et al.

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