PEREE ZVT PWM converter and zcT PWM converter Feature: auxiliary switch is in parallel with main switch L L S VD4ⅴD VD VD Basic switching cells for a)ZVT PWM and b)ZCT PWM 12Power Electron cs i 12 ZVT PWM converter and ZCT PWM converter ZVT PWM converter and ZCT PWM converter Feature: auxiliary switch is in parallel with main switch Feature: auxiliary switch is in parallel with main switch S Lr VD L S1 Cr VD1 Lr Cr S1 S VD VD 1 L a) b) Basic switching cells for a) ZVT PWM and b) ZCT PWM