Abstract

This paper proposes a new ZVT-ZCT bidirectional DC-DC converter for energy storage systems in DC traction vehicles. The conventional hard-switched converter have turn-on/off losses which may affect the overall converter efficiency. The proposed converter utilizes an auxiliary circuit with resonant inductor, capacitor and diodes. This converter has two important features like zero-voltage transition at the main switches turn-on and zero current transition at turn-off are achieved with same auxiliary circuit. In this paper, the theoretical analysis and simulation results are verified with the performance of the proposed converter.

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