SYSTEM FOR CONTROLLING BLDC MOTER

摘要

PURPOSE: A BLDC motor control system is provided to improve the reliability of an BLDC circuit by switching a BLDC motor control method into a sensorless control method when the malfunction of the hall sensor is detected. CONSTITUTION: A three phase BLDC motor includes three hall sensors which are arranged around a three phase coil and a rotation shaft. A motor driving circuit controls a three phase BLDC motor with a sensorless method if the signal received from the hall sensors corresponds to an error signal. If the same signals are received from hall sensors, the motor driving circuit determines the received signal as the error signal.