A ds-qs axis transformation with adjustable angle for three-phase AC/DC converter

Abstract

In this paper, the application of an adjustable angle ds-qs axis transformation for three-phase AC/DC converter is proposed. The proposed converter adopts the method of an adjustable angle ds-qs axis transformation, it makes voltage space vector correspond the switching table. The method avoids more number of switching in the switch. Using the way of hysteresis current controls the inductor current, the mode of switch, and power factor correction. The switching table is programmed by voltage space vector, it can manage switching numbers in the switch. Therefore, the proposed converter can reduce switching loss and increase system efficiency. Both CPLD and Quartus II software are employed to build switching table. Finally, some experimental results are presented to verify the feasibility of the proposed control strategy.