A ZVT PWM boost converter using an auxiliary resonant source

This paper proposes a zero-voltage transition (ZVT) PWM boost converter with a resonant auxiliary circuit. It enables the main switch to be turned on and off with zero voltage and the auxiliary switch to be turned on and off with zero current. Additionally, all diodes commutate under soft conditions. The soft-switching conditions are achieved without penalizing the converter conduction losses and they can be maintained for a wide line and load ranges. The converter operation is explained and analyzed, and its feasibility is confirmed by experimental results obtained from a 1 kW, 100 kHz laboratory prototype. It is demonstrate a gain in efficiency about 1.4% higher than the conventional ZVT PWM boost converter