Alternating current electric motors and generators

Details Alternating current electric motors and generators Alternating current electric motors and generators

1976-11-01

1979-02-06

Skudy, R.

Electrical generator or motor structure

Dynamoelectric

Rotary

310198, 310207, 318773, H02K 300

Patent

active

041386191

ABSTRACT:
Three-phase, alternating current, pole-amplitude modulation (P.A.M.) pole-changing electric motors or generators having series/parallel connection of phase winding parts for the alternate pole-members. To obtain approximately equal air-gap flux-density for both pole-numbers, selected coils are provided in branch connection with the main phase winding parts and switched in circuit for one pole-number only. Such selection, to be consistent with normal coil-reversal requirements of pole-changing by P.A.M., is shown to necessitate branch coils represented by similarly angularly positioned vectors in each phase-winding and of equal number in the reversed and non-reversed phase-winding parts.

REFERENCES:
patent: 3175144 (1965-03-01), Rawcliffe
patent: 3308363 (1967-03-01), Rawcliffe
patent: 3515922 (1970-06-01), Fong
patent: 3794870 (1974-02-01), Broadway
patent: 3898543 (1975-08-01), Broadway
patent: 3949253 (1976-04-01), Broadway
patent: 4013909 (1977-03-01), Broadway

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