METHOD OF CONTROL OF SINGLE-PHASE START-POLE INDUCTOR ELECTRIC MOTOR (VARIANTS) Russian patent published in 1997 - IPC

FIELD: domestic appliances; washing machines and refrigerator compressors. SUBSTANCE: for starting the motor first start-pole winding is energized irrespective of rotor position pickup signal. Then control winding is energized in conformity with signals of rotor position pickup. In reversal, control winding is the first to be energized irrespective of rotor position pickup signals, and then start-pole winding is energized by signal of rotor position pickup. Further on, control winding is supplied in compliance with inverted signals of rotor position pickup. If static friction torque is detected on stationary rotor shaft, it is good practice to use process of starting at which in contrast to starting process indicated above, prior to applying current pulses to control winding by position pickup signal, three current pulses are supplied alternately to starter winding, control winding and to starter winding again by signal coming from position pickup. In this case, the last two pulses are supplied if rotor is set to dead position. In case of reversal pulse supply sequence is changed. EFFECT: enhanced efficiency of control. 2 cl, 3 dwg