At　present,　most　of　power　supply　systems　for　intracorporeal　medical　instrumentations　adopt　internal　power　storage　mode　or　transcutaneous　energy　transmission　system.　However,　both　patterns　have　some　disadvantages:　internal　power　storage　mode　cannot　supply　long-term　power　so　that　this　mode　limits　the　continuity　of　total　system;　infection　is　easily　generated　in　a　transcutaneous　energy　transmission　system　which　brings　numerous　inconveniences　to　patients.In　order　to　solve　these　problems,　a　novel　contactless　power　supply　system　designed　by　our　group,　which　transmits　electric　power　for　intracorporeal　medical　instrumentations　from　outside　of　the　skin　to　inside.　The　novel　power　supply　system　consists　of　a　pair　of　coupling　permanent　magnets　mounted　on　a　motor　and　a　subminiature　generator　respectively.　After　electricity　passes　through　a　voltage　doubling　rectification　circuit　and　a　filter　circuit,　it　is　able　to　charge　a　battery　pack　and　provide　energy　for　intracorporeal　medical　instrumentations,　such　as　blood　pump.　Output　voltage　(5.5v-10.5v)　of　this　system　has　achieved　the　requirement　of　high　safety.　With　a　variation　of　input　voltage　from　12v　to　13v,　output　voltage　is　stable　relatively.　And　at　the　point　of　12v,　maximum　efficiency　is　obtained.　This　system　doesn＇t　need　external　wire　connection　and　avoids　infection.　Furthermore,　this　equipment　of　power　supply　expands　the　freedom　of　patients,　doing　certain　activities　and　improving　their　life　qualities.©　2011　IEEE.