Control method of direct drive type oscillating bar skirt washing machine

摘要

The present invention relates to a washing control method of a direct drive type oscillating bar skewer washing machine, in which a mechanical vibration impact occurs due to a sudden rise of a current at a time point when the actual rotation direction and the driving direction of the motor are reversed, The present invention is characterized in that it is determined whether or not the rotational direction of the actual motor and the driving direction are the same before starting the driving in the forward and backward directional driving, A second step of PWM-modulating all of the upper and lower gate driving signals in order to suppress a sudden increase in current when the direction is different, a third step of detecting the first RPM to determine the first and second PWM duty, A fourth step of raising the PWM duty from the first PWM duty to a first slope until the rotating direction and the driving direction become the same, A fifth step of changing the gate output signal so as to PWM modulate only one side of the upper and lower sides and raising the PWM duty from the second PWM duty to the target duty by the second slope and maintaining the gate duty signal; The PWM duty is reduced to zero by the second slope to zero, and the seventh step of turning off the motor is performed to control the mechanical vibration impact caused by the sudden current rise during the forward / reverse rotation of the washing machine, thereby extending the life of the washing machine It is.