A three-phase predictive PWM AC/DC converter with phase compensation and space vector control

In this paper, a current-controlled three-phase PWM AC/DC power converter is described. The current control is based on the predictive and the space vector PWM scheme. The phase shift caused by the predictive current control is compensated adaptatively so that the predictive-controlled PWM AC/DC power converter can maintain its performance with unity power factor and fixed switching frequency at low sampling frequency. The control system is implemented by an 8-bit microcontroller. By using the space vector control, low ripples in the current and the voltage as well as fast dynamic responses are achieved with a small DC link capacitance employed