H - Electricity – 02 – P
Patent
H - Electricity
02
P
318/103, 324/17
H02P 21/10 (2006.01) H02P 25/02 (2006.01)
Patent
CA 1073524
20 TT 601A ABSTRACT OF THE DISCLOSURE A torque regulating alternating current induction motor control system comprising a motor flux sensing coil arrangement mounted on the induction motor stator for sensing the actual flux produced across the rotor-stator air gap of the motor and deriving a motor flux voltage signal proportional to the actual motor flux. An integrating circuit integrates the voltage signal to obtain a feedback sensed actual motor flux signal representative of the actual air gap flux. An actual torque feedback circuit converts the actual air gap flux and stator current signal to an actual value of torque feedback control signal. A second feedback control loop also responsive to the feed- back sensed actual value of flux converts the flux signal into a Image voltage control signal for maintaining a substantially controlled value of rotor-stator air gap flux level. The first and second feedback control loops are interconnected and coact to maintain operation of the induction motor at a controlled value of torque.
325418
Company General Electric
Na
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