An ISOP-PSFB PWM Converter Based on Coupled Output Inductors and Phase-Shifted Modulation with Full ZVZCS Range

This paper proposes an Input-Series-Output-Parallel Phase-Shifted Full-Bridge (ISOP-PSFB) converter based on coupled output inductors. With the phase-shifted modulation, the coupled inductors enable mutual current interaction, reducing circulating current and eliminating duty cycle loss. Unlike conventional ISOP-PSFB converters that improve performance by adding auxiliary networks, the proposed converter adopts coupled inductors instead of the independent output inductors, combined with phase-shift modulation to achieve Zero Voltage and Zero Current Switching (ZVZCS) in the full operating range without the need for additional components. This paper provides the analysis of the proposed topology, operating principles, and characteristics. Finally, the simulation and experimental results have verified the effectiveness.