METHOD FOR CONTROLLING BLDC DIRECT DRIVER MOTOR FOR LAUNDRY WASHING MACHINE

摘要

PURPOSE: A method is provided to prevent noises caused due to over-current by directly or gradually turning off a PWM output in accordance with the rotating speed of a BLDC motor when a BLDC motor stop signal is input during operation. CONSTITUTION: A method comprises a step(S100,S200) of judging the rotating speed of a BLDC motor when a BLDC motor stop signal is input during operation; a step(S300,S400,S500) of stopping the operation of the BLDC motor by gradually reducing the voltage duty of the PWM signal applied to the BLDC motor if the rotating speed of the BLDC motor is lower than a reference speed; and a step(S700) of turning off the PWM signal applied to the BLDC motor and stopping the operation of the BLDC motor if the rotating speed of the BLDC motor is higher than the reference speed.