Synchronous motor field loss recovery

Details Synchronous motor field loss recovery Synchronous motor field loss recovery

H - Electricity

02

P

H02P 6/00 (2006.01) H02K 11/00 (2006.01) H02K 19/12 (2006.01) H02P 1/54 (2006.01) H02P 6/12 (2006.01)

Patent

CA 2502372

A synchronous motor system in which recovery due to a failed field excitation supply is achieved automatically without resort to, or by minimizing the length of time in asynchronous operation of the motor. A sensing system is deployed to provide a sensed signal that is caused by a failed field excitation supply to vary from a reference value by a predetermined amount. A control unit responds to detected failure by automatically changing a field winding system of the motor over from the failed field excitation supply to a standby field excitation supply. The standby supply can be shared by several synchronous motors.

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