Dual capacitor speed control apparatus and method for electric m

Details Dual capacitor speed control apparatus and method for electric m Dual capacitor speed control apparatus and method for electric m

1992-08-21

1994-04-05

Shoop, Jr., William M.

Electricity: motive power systems

Induction motor systems

Primary circuit control

318779, 318778, 318795, 318817, H02P 126

Patent

active

053008715

ABSTRACT:
An induction motor speed control apparatus and method wherein various capacitors are switched in series with the auxiliary winding of an induction motor and, during such switching, the power source is disconnected from the main and auxiliary windings and the in-use capacitors are momentarily connected to the main winding to form a closed-loop discharge path through the main and auxiliary windings.

REFERENCES:
patent: 4408150 (1983-10-01), Holston et al.
patent: 4465960 (1984-08-01), Pfarrer
patent: 4782278 (1988-11-01), Bossi et al.
patent: 5017853 (1991-05-01), Chmiel
patent: 5192887 (1993-03-01), Theis

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