A practical control of a cost reduced single phase to three phase converter

This paper describes the investigation into the performance of a voltage regulated, cost-reduced single-phase to three-phase power converter. A detailed control strategy to regulate the DC bus voltage is explained. The DC bus voltage is regulated by controlling the phase shift angle /spl delta/ between the supply, and the inverter. The regulation of a DC bus voltage method of the proposed converter was implemented using digital signal processor. The DC bus voltage was kept constant whilst maintaining the inverter as a balanced static VAr compensator. The dynamic performance of the inverter was shown under two conditions, namely: (1) variation of the load over a specific range; and (2) variation of the input voltage with the load kept constant. The results obtained for each condition show that constant DC bus voltage and AC regulation is achieved.