MOTOR CONTROL METHOD AND SYSTEM

摘要

A motor control method and system are provided. The motor control method includes recognizing, by a controller, a driving signal for a motor. When the controller recognizes the driving signal, it determines a failure of multiple Hall sensors disposed within the motor. Three Hall sensors may be placed with a phase difference of 120 degrees, to produce output signals in form of 0 and 1. When all sensors report the same output signal level, a failure of one or more sensors is detected. When one or more Hall sensors in the motor are determined to be faulty, the controller identifies a faulty Hall sensor from among the multiple Hall sensors by analyzing respective frequencies of the signals detected by the Hall sensors, in particular by comparing them to a reference frequency indicating normal operation. Additional checks may be performed if all sensors are initially identified as operating normally, e.g. monitoring of the motor control current or attaining of the commanded RPM.