PWM control techniques in current source rectifiers

Force commutated current source rectifiers are mostly controlled using PWM patterns generated offline. This procedure simplifies the inclusion of special requirements associated with unidirectional power switches. This paper shows that online techniques developed for voltage source inverters can be readily adapted to current source rectifiers, thus taking advantage of features such as reduced switching frequency and increased gain. Implementation and performance of the proposed carrier-based and space vector techniques are presented. Finally, the proposed carrier-based techniques are verified an a 5 kVA experimental unit