METHOD AND APPARATUS FOR CONTROLLING STARTING OF SYNCHRONOUS MOTOR AND ELECTRIC PUMP FOR CONTROLLING WORKING FLUID OF MOTOR VEHICLE DRIVING SYSTEM USING THE APPARATUS

摘要

A method for controlling starting of a synchronous motor (8) having an excellent starting ability and capable of coming into a commutation mode in a short time is provided. An AC current having a predetermined frequency is supplied to a field coil (81) of the synchronous motor (8) by an inverter (91), thereby starting the synchronous motor (8). By detecting a terminal voltage of the field coil (81) of the synchronous motor (8) at the starting time, and decreasing a voltage waveform component based on the AC current supplied by the inverter (91) from the detected voltage, the waveform is corrected so that the voltage waveform component based on the counter electromotive force can be confirmed (110). And after integrating the corrected waveform (111) and converting the same into a square wave (112), a phase difference between the same (104) and an output of a 120 DEG energization waveform generating circuit (102) is detected to be fed back. IMAGE