CONTROLLING CIRCUIT FOR AN INVERTER

摘要

The control circuit includes a current control minor loop for controlling the instantaneous value of the output current of the power conversion apparatus in compliance with a current reference value. This value is determined as the sum of the load current component determined basing on the detected value of load curent. The modification current component is produced by a voltage controller to current error of output line voltage of the power conversion apparatus in respect to a sinusoidal voltage reference. The output voltage of the power conversion apparatus is controlled accurately to have less distortion against harmonics of the load.