Control of the Single-Phase to Three-Phase Four-leg Converter for Constant Frequency Output Voltage

This paper proposes a control strategy to a reduced switch count single-phase to three-phase converter for constant frequency output voltage applications. The topology allows single-phase to three-phase power conversion for supply three-phase load. The control strategy is proposed to obtain the same voltage rating of a five-leg converter. The system can be used for applications in which the load operates with constant frequency. Pulse-width modulation techniques are developed, introducing the concept of local and general apportioning factor. Experimental and simulated results are presented