Zero-voltage and zero-current-switching PWM combined three-level converter

This paper proposes a Zero-Voltage and Zero-Current-Switching (ZVZCS) PWM combined three-level (TL) converter, which is a combination of a ZVZCS PWM TL converter with a full-bridge converter The proposed converter has advantages as follows: All power switches suffer only half of the input voltage. Meanwhile, they can realize ZVS or ZCS in a wide load range. The voltage across the output filter is very close to the output voltage, which can reduce the output filter inductance significantly. The voltage stress of the rectifier diodes is reduced too. The operation principle of the proposed converter is analyzed and verified by the experimental results.