The　unipolar　and　bipolar　coils　are　two　most　common　coil　structures　used　in　inductive　power　transfer　systems.　However,　they　are　decoupled　from　each　other　when　fully　aligned,　indicating　that　they　are　not　interoperable　with　each　other.　In　order　to　solve　the　interoperability　problem,　an　interoperable　transmitter　composed　of　two　adjacent　unipolar　coils　and　a　three-switch　dual-output　inverter　is　proposed　in　this　letter.　It　can　achieve　compatibility　with　unipolar　or　bipolar　coils　through　circuit　configuration　by　alternating　the　current　directions　with　efficient　wireless　power　transmission.　Two　different　operating　modes　are　presented,　and　the　mathematical　models　are　established.　An　experimental　prototype　is　established.　Besides,　the　anti-offset　has　been　tested.　The　calculated　and　experimental　results　have　revealed　that　the　proposed　system　can　effectively　improve　interoperability　and　has　great　potential　for　development.　©　1986-2012　IEEE.