In　this　article,　a　novel　three-winding　coupled　inductor　(TWCL)　based　high-gain　dc-dc　converter　is　proposed,　which　combines　a　TWCL　technique　and　a　voltage　multiplier　cell,　avoiding　large　duty　cycle　and　resulting　in　a　high　gain　of　the　converter.　The　input　current　continuity　and　common　ground　make　the　proposed　converter　suitable　for　renewable　energy.　In　addition,　the　converter　also　has　the　characteristics　of　low　voltage　stress　on　switch　and　high　efficiency.　A　passive　clamp　circuit　recycles　the　energy　stored　in　the　leakage　inductor　of　the　coupled　inductor　and　reduces　the　voltage　spike　of　the　switch,　thus　improving　efficiency.　The　steady-state　analysis,　parameter　design,　and　loss　analysis　of　the　proposed　converter　are　discussed　in　detail,　and　the　comparison　among　existing　high-gain　converters　is　discussed　as　well.　Finally,　experimental　results　verify　the　theoretical　analysis.　　©　1986-2012　IEEE.