Zero-Voltage and Zero-Current-Switching PWM Combined Three-level Converter

This paper proposes a Zero-Voltage and Zero-Current-Switching PWM combined three-level converter (ZVZCS PWM C-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. The MOSFETs can realize ZVS in a wide load range, and the IGBTs can realize ZCS in a wide load range too. The voltage across the output filter is a three level waveform, 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.