METHOD FOR UNINTERRUPTED CONTROL OF ALTERNATING VOLTAGE

摘要

A method for uninterrupted control of output voltage in an autotransformer key-operated control member includes switching from step-up side to step-down side during acting half-period of input voltage at changing current direction. Time of step-down action and moment of switching to step-up one during the same half-period of input voltage is calculated according to the measured actual current value of output voltage to provide the required level of actual output voltage.