In　order　to　solve　the　problems　of　low　output　and　poor　voltage　stability　in　new　energy　power　generation　system,　a　non-isolated　low　input　current　ripple　high　gain　soft　switching　DC-DC　converter　was　proposed.　Combined　with　active　clamp　technology　and　coupled　inductance　and　diode-capacitor　voltage　doubling　structure,　by　the　converter　the　voltage　gain　was　improved　and　the　voltage　stress　of　the　switching　device　was　reduced.　The　leakage　of　the　coupling　inductance　effectively　alleviates　the　diode　reverse　recovery　problem,　and　the　leakage　energy　was　recovered　and　utilized　through　the　active　clamp　network.　Using　coupling　inductance　leakage,　all　switching　tubes　realize　zero　voltage　soft　switching,　which　improves　the　efficiency　of　the　converter.　The　topology　structure　and　working　principle　of　the　converter　are　analyzed　in　detail,　and　the　voltage　gain,　voltage　and　current　stress　of　the　device　and　the　circuit　performance　of　the　soft　switch　were　analyzed.　Finally,　a　prototype　with　40　V　input,　400　V　output　and　160　W　rated　power　was　built.　The　experimental　results　show　that　the　converter　has　the　advantages　of　low　input　current　ripple,　high　voltage　gain,　high　conversion　efficiency　and　low　voltage　stress.　©　2023　Editorial　Department　of　Electric　Machines　and　Control.　All　rights　reserved.