The　magnetic　couplers　play　an　important　role　in　electric　vehicle　(EV)　wireless　power　transfer　(WPT)　systems.　Conversational　coupling　structures　are　mainly　based　on　unipolar,　bipolar,　and　quadrupole　coils,　and　the　interoperability　among　them　cannot　be　achieved.　To　solve　the　interoperability　problem　in　the　coupling　structure,　a　novel　bipolar　coil　structure　is　proposed　in　this　paper.　Energy　transfer　with　unipolar　and　bipolar　coils　is　achieved　by　interconnecting　unipolar　and　bipolar　types　crosswise　in　the　same　plane　and　combining　them　with　the　corresponding　topologies.　They　are　connected　in　series　on　the　dc　side.　An　experimental　prototype　is　built　to　verify　the　interoperability　performance　of　the　proposed　novel　bipolar　coil　structure.　The　proposed　novel　bipolar　coil　structure　can　be　compatible　with　unipolar,　bipolar,　and　quadrupole　coils　and　achieve　a　maximum　dc-dc　efficiency　of　more　than　85%.　A　new　bipolar　coil　structure　for　interoperability.　image