A　LCCL　resonant　converter　topology　for　electrodeless　lamp　is　presented.　Dedicating　to　the　converter　and　load　characteristic,　a　resonant　frequency　expression　is　derived.　Voltage　gain　with　different　loads　and　parameters　is　given.　At　stable　state,　maximum　output　power　condition　and　zero　voltage　switching　(ZVS)　qualification　are　obtained　specializing　for　design.　The　effect　of　the　variations　of　parameters　on　resonant　characteristic　and　ZVS　are　analyzed.　To　ensure　ZVS　and　reduce　the　switching　loss　when　the　inherent　resonant　frequency　is　changed,　a　parameter　design　method　balanced　the　maximum　power　and　ZVS　qualification　is　proposed.　A　85W　laboratory　prototype　was　built.　Experimental　results　were　proposed　to　confirm　validity　of　the　method　presented.　©,　2015,　Chinese　Machine　Press.　All　right　reserved.