Rotor short-circuiting switch

Details Rotor short-circuiting switch Rotor short-circuiting switch

H - Electricity

02

P

318/78

H02P 1/50 (2006.01)

Patent

CA 1096439

ABSTRACT OF THE DISCLOSURE A transistor switch short-circuits the main field rotor winding of a synchronous machine during start-up. A transistor is connected across the main field rotor winding and is responsive to the polarity of the voltage induced in the main field rotor winding by the main stator winding. When the voltage is of one polarity, the transistor conducts to short-circuit the main field rotor winding. When the voltage across the main rotor winding is of the opposite polarity, diodes limit the voltage buildup. The transistor which shorts the main field rotor winding is rendered inoperative when the machine is operating at or near synchronous speed.

303906

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