Output Current Control of Three-Phase Secondary-Resonant SAB DC-DC Converter for Variation of Output Voltage

This paper presents output current control of three-phase Secondary-Resonant Single-Active-Bridge (SR-SAB) DC-DC converter by changing the frequency of the primary voltage. The proposed SR-SAB converter can reduce the transformer capacity compared with a conventional circuit. Therefore, the SR-SAB converter is suitable for high-power application. The battery charger is required to follow the output current to the output current reference in any output voltage. The effectiveness of the proposed control method is verified by experiments using a 3.5 kW laboratory prototype.