THREE PHASE BLDC MOTOR CONTROL METHOD AND SYSTEM

摘要

PURPOSE: A control method and a system thereof are provided to prevent traffic accidents by normally controlling a three phase BLDC motor regardless of the malfunction or the defect of a hall sensor. CONSTITUTION: A motor driver(20) drives a three phase BLDC motor. A CPU(30) controls the motor driver. A detector(40) senses the speed of the three phase BLDC motor. The detector is a hall sensor. A digital filter circuit(50) converts the output of the motor driver into the output signal of the detector. A comparator circuit(60) compares the output signal of the digital filter circuit.