Verfahren und Vorrichtung zum Regeln der Drehzahl eines Waschmaschinenmotors

摘要

Method and devices for controlling speed of a washing machine motor by varying number of revolutions and changing direction of rotation of the motor through controlling phase of the motor. The method for controlling speed of a washing machine motor includes steps of actual speed detection for detecting actual speed of a washing machine motor at every half cycle of ordinary use power frequency, speed error detection for detecting speed error by comparing the detected actual speed with ordered speed, speed condition determination for determining a condition of speed using the detected speed error, proportional integration compensation value calculation for calculating a proportional integration value according to the determined speed condition, angular value scaling for scaling the calculated proportional compensation value into a angular value, and washing machine motor speed control for controlling speed of a washing machine motor using the scaled angular value. Devices for controlling speed of a washing machine motor using a microcomputer are also described.