MOTOR CIRCUIT INCLUDING A CIRCUIT FOR DETECTING OVERCURRENT OF AN INVERTER, AND A METHOD FOR SUPPLYING POWER TO THE CIRCUIT FOR DETECTING THE OVERCURRENT OF THE INVERTER

摘要

PURPOSE: A motor circuit and a method for supplying power to the circuit for detecting overcurrent of an inverter are provided to reduce the size of the whole system by reducing the size of a transformer.;CONSTITUTION: A rectifier(DB1) rectifies AC input power. A switching power supply device(140) generates voltage for boosting voltage of a pulse-width modulating signal to a certain level. An overcurrent detecting circuit(100) performs the overcurrent detection of a DCP terminal of an inverter. A snubber circuit(130) charges the flyback power source of the switching power supply device. The power supply circuit(120) supplies the flyback power source as the drive power of the overcurrent detecting circuit.;COPYRIGHT KIPO 2013;[Reference numerals] (100) Overcurrent detecting circuit; (120,AA) Power supply circuit; (130) Snubber circuit; (140) Switching power supply device