In　high　voltage　and　large　power　applications,　IGBTs　are　often　chosen　as　power　switches.　Due　to　their　tail　currents,　zero　current　turning-off　can　reduce　switching　loss　effectively.　A　two-winding　coupled　inductor　and　two　diodes　are　introduced　to　realize　zero-voltage　and　zero-current　switching　(ZCS)　for　phase-shifted　full-bridge　converter.　ZCS　of　the　lagging-leg　switches　is　achieved　in　wide　load　range.　The　added　diodes　are　turned　on　and　off　with　soft　switching.　The　leakage　inductor　of　the　coupled　inductor　will　not　increase　voltage　stress　of　the　added　diodes.　To　reduce　the　impact　of　magnetizing　current　of　the　coupled　inductor　on　ZCS,　two　small　capacitors　are　paralleled　with　two　diodes,　respectively.　Without　increasing　the　size　of　the　coupled　inductor,　the　interval　of　the　reset　voltage　is　increased　so　that　the　lagging-leg　switches　can　be　turned　off　with　ZCS　in　practice.　The　analysis　is　verified　by　simulation　and　experimental　results　on　a　68　kHz,　100　V/10　A　prototype.　The　results　of　simulation　and　experiment　verify　the　validity　of　the　proposed　scheme.　©　2016,　The　editorial　office　of　Transaction　of　China　Electrotechnical　Society.　All　right　reserved.