PEREE ZVS QRC L K us VD VD本 R r124y415Power Electron cs i 14 ZVS QRC ZVS QRC Ui Cr S VDS Lr VD L C A R S u S ( u Cr ) i S iLr uVD t 0 t 1 t 2 t 3 t 4 t 6 t 0 t t t t t t 5 O O O O O Cr Ui + uCr IL A Cr Ui + uCr i Lr to ~ t1 1 t1 ~ t2