Starting multi-speed motors at a low speed connection

Details Starting multi-speed motors at a low speed connection Starting multi-speed motors at a low speed connection

H - Electricity

02

P

H02P 1/42 (2006.01) H02K 17/08 (2006.01) H02P 1/44 (2006.01) H02P 1/50 (2006.01)

Patent

CA 2061207

A multi-speed electric motor (1) has a main electrical winding (3) and an auxiliary electrical winding (5) connected in parallel. One additional electrical winding (21) is connected in series with the parallel connected main and auxiliary windings, and another additional electrical winding (23) is connected in series with this third winding. A temperature sensitive resistive element (25) is connected in parallel with at least one of the additional electrical windings. The resistive element improves the motor's starting torque when one or more additional windings are initially connected in the motor circuit as it is started.

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