DRIVING METHOD AND DRIVER OF BRUSHLESS DC MOTOR

摘要

A method for driving a brushless DC motor comprises a step for rectifying the AC voltage of an AC power supply through a rectifier circuit having a capacitor connected between the output terminals and receiving the AC voltage of the AC power supply, a step for driving the motor through an inverter connected to the rectifier circuit, a step for detecting the rotational position of the rotor of the motor according to the counter electromotive force of the motor or the motor current by using a position detector, a step for estimating the rotor position through a position estimator when it cannot be detected by the position detector, and a step for controlling the inverter by a controller according to the rotor position detected by the position detector or the rotor position estimated by the position estimator.