Abstract: A novel zero voltage switching（ZVS） phase-shift full-bridge converter with commutation capacitor and LC auxiliary circuit was proposed.This converter contains the advantages of small rectifier voltage oscillation and no duty cycle loss,and realizes ZVS for all primary switches over a wide load range.Mechanism of the rectifier voltage oscillation was discussed in detail.The operation principle of the circuit was demonstrated,and the design method of key parameters was given.Finally,the experimental results from a 650W/28V,100 kHz prototypes were presented to confirm the operation,validity,and features of the proposed converter.