PEREE Quasi-Resonant Converter--QRc 4 ZVS QRC ◆ ZCS QRO 4 ZVS MRC (multi-resonant converter) Resonant DC link converter VD 2)不VD a)ZVS QRC b)ZCS QRC c)ZVS MRC Basic switching cells for QRCPower Electron cs i 10 Quasi -Resonant Converter Resonant Converter—QRC ZVS QRC ZVS QRC ZCS QRC ZCS QRC ZVS MRC (multi ZVS MRC (multi -resonant converter) resonant converter) Resonant DC link converter Resonant DC link converter S VD Lr L Cr S VD Lr L Cr1 Cr2 S Lr Cr VD L a) ZVS QR C b) ZCS QRC c) ZVS MRC Basic switching cells for QRC