The traditional design of RC parameter is based on the resonant equivalent circuit

which can not accurately describe the diode reverse recovery process

and it is difficult to optimize the RC parameters. Based on a lumped charge model for high-power PIN diode

the parameters of RC snubber are optimized with multi-objective optimization. Firstly

according to the topology and modulation mode of a three-level phase-shifted full-bridge converter

the influences of RC parameters on the reverse voltage spike of rectifier diode are analyzed. Secondly

based on the lumped charge model for high-power PIN diode

the simulation verification is performed by theoretical analyses. Then

multi-objective optimization design is used to design RC snubber. Finally

the experimental results verify the effectiveness of the optimal RC parameters to suppress the reverse voltage spike of rectifier diode.