Analysis, Design and Implementation of a Bidirectional Three-Phase Push-Pull Converter for Wide Voltage Range Application

In this paper, a bidirectional three-phase push pull converter is designed and analyzed for the high power, wide low voltage side (LSV) range application. In the case of wide LSV range operation, the transformer leakage inductance should be well-designed considering the wide power range, low slew rate current in facing the load variation. Value of leakage inductance and transformer ratio are selected for reducing the RMS current of transformer over wide LVS range. The effect of dead-time is also analyzed in detailed. Power flow is analyzed with the different operation areas. The exact power equations are established as the function of leakage induction, dead-time. The results have been obtained to show the reduction of slew rate current. The performance of 22kW bidirectional three-phase push pull converter is verified by experiment results.