The　bipolar　DC　microgrid　system　represents　an　innovative　power　supply　architecture　offering　high　reliability,　flexibility,　and　efficiency.　Building　upon　advanced　research　findings,　this　study　proposes　a　three-winding　coupled-inductor　bipolar-output　high-gain　DCDC　converter.　By　incorporating　coupled　inductor　coils　and　a　switched-capacitor　boosting　mechanism　into　a　bipolar-output　three-level　Boost　converter　topology,　the　proposed　converter　achieves　low　input　current　ripple　and　reduced　stress　on　switching　devices.　The　output　voltages　can　be　regulated　via　the　switch　duty　cycle　and　the　turns　ratio　of　the　coupled　inductor.　This　paper　presents　the　topology　derivation,　operating　principles,　and　mode　analysis　of　the　proposed　converter.　The　voltage　gain,　along　with　the　voltage　and　current　stresses　on　key　components,　is　theoretically　derived　and　numerically　evaluated.　A　comparative　analysis　is　conducted　against　existing　high-gain　DC-DC　converters　to　highlight　the　advantages　in　efficiency　and　performance.　Furthermore,　the　efficiency　of　the　converter　is　thoroughly　analyzed.　An　experimental　prototype　was　developed　to　validate　the　converter′s　performance.　The　prototype　operates　at　a　switching　frequency　of　50　kHz,　with　an　input　voltage　of　28　V　and　an　input　power　of　200　W,　delivering　bipolar　output　voltages　of　+190　V　and　-190　V.　A　suitable　input　inductor　is　selected　based　on　the　desired　input　current　ripple　ratio.　Full-load　tests　(200　W)　were　conducted　at　input　voltages　of　24,　28,　and　32　V,　with　the　system　successfully　boosting　to　a　total　output　voltage　of　380　V.　Experimental　waveforms　of　input　current　and　output　voltage　are　presented　under　both　half-load　and　full-load　conditions,　demonstrating　efficiencies　of　95.　65%　and　93.　63%,　respectively.　These　results　confirm　that　the　proposed　converter　performs　efficiently　under　high-frequency　operation,　making　it　highly　suitable　for　applications　requiring　high　efficiency　and　compact　design.　The　converter　shows　strong　potential　for　widespread　application　and　holds　significant　research　value　in　the　field　of　electric　power　systems.　©　2025,　Science　Press.　All　rights　reserved.