D27.4 - Dual-Transformer Active-Clamp ZETA Converter

This study aims to develop a novel dual-transformer active-clamp ZETA converter by integrating an active-clamp topology, a dual-transformer configuration, and a secondary-side structure similar to that of the asymmetrical half-bridge ZETA (AHBZ) converter. The proposed design achieves a wide output voltage range and high efficiency, incorporating zero-voltage switching (ZVS) technology. The converter is specified with an input voltage (Vin) of 400 V, an output voltage (Vout) ranging from 30 V to 60 V, an output current (Io) of 3 A, and an output power (P) of 90 W to 180 W. Efficiency evaluation through PSIM simulation demonstrates a peak efficiency of 90%. Experimental results under 90 W to 180 W output power levels achieve efficiencies between 84% and 87%. The proposed converter is suitable for high-efficiency LED driver applications, such as street lighting or large-scale venue illumination, offering substantial development potential and application value.