This　paper　proposes　a　novel　high-speed　permanent　magnet　synchronous　machine　(HSPMSM)　topology.　The　characteristics　of　the　proposed　machine　are:　1)　the　stator　winding　is　divided　into　two　parts　and　each　part　is　connected　by　the　end　ring　at　one　end,　which　is　helpful　to　solve　the　existing　shortage　of　overlong　end　length　in　traditional　HSPMSM.　2)　the　stator　of　the　machine　is　designed　with　closed　slot,　which　can　greatly　weaken　the　eddy　current　loss　and　the　cogging　torque　of　the　machine.　3)　the　machine　is　driven　by　two　separate　three　phase　converter,　which　can　improve　the　fault　tolerance.　In　this　paper,　the　topology,　and　the　corresponding　control　system　is　analyzed　firstly.　After　that　the　electromagnetic　performance,　including　back　electromotive　force,　cogging　torque,　torque,　etc.　are　analyzed　with　finite　element　analysis　(FEA).　In　addition,　the　losses,　including　the　stator　copper　loss,　the　stator　iron　loss　and　the　eddy　current　loss　of　the　permanent　magnet　and　sleeve　of　the　rotor,　are　calculated　by　FEA.　Finally,　the　mechanical　strength　of　rotor　is　also　checked.　The　results　show　the　validity　of　the　topology,　and　it　is　useful　for　the　further　improvement　of　torque　density　for　HSPMSM.　©　2020　IEEE.