SELF-TESTING METHOD OF INVERTER DRIVING CIRCUIT

摘要

The method for diagnosing the functions of the inverter by itself before operation includes steps : a) detecting the simultaneous turn-on states of the power transistors by applying the driving pulses in sequence with maximum width; b) stopping the operation when detecting the simultaneous turn-on of the transistor; c) if not, applying over-current to the induction motor and detecting the over-current with the instantaneous current detector; d) running the inverter normally if detecting it, but stopping the operation as alarming otherwise.