Analysis and suppression on rectifier diode of outside of oscillation of digital controlled source

Abstract

By analyzing the shock and spike voltage on the rectifier diode during converter process of the phase-shift full bridge ZVS DC/DC converter which is configured as full wave rectifier in second side, this paper aims at explaining the reason of shock and spike voltage after that equivalent circuits and mathematical models are established. Then by analyzed the mathematical model, we thus conclude that a relationship is between parasitic parameters and resonance oscillations. And last RCD snubber circuit experiments are carried out in Saber and experiment prototype of 500 W which proves resonance oscillations can be curbed effectively.

Keywords

• phase-shift full bridge
• full wave rectifier
• spike voltage
• RCD snubber circuit