Aiming　at　the　problem　of　low　power　density　of　the　existing　eddy　current　retarder,　a　New　Toothed　Coil　Eddy　Current　Retarder　(TC-EHR)　is　presented.　The　TC-EHR　utilizes　the　space　of　one　set　of　coils　to　achieve　the　magnetic　flux　that　can　only　be　obtained　with　two　sets　of　coils　in　a　conventional　eddy　current　retarder.　During　operation,　the　TC-EHR　creates　a　three-dimensional　magnetic　circuit　between　the　stator,　rotor　and　air　gap.　First,　the　structure　and　operating　principle　of　the　TC-EHR　are　introduced.　Second,　an　equivalent　magnetic　pole　principle　model　(one　cycle　model　in　the　circumferential　direction)　was　designed　based　on　the　principle　that　the　magnetic　flux　is　equal　to　that　at　each　head　of　the　complete　model　of　the　TC-EHR.　Subsequently,　the　static　electromagnetic　field　and　the　seemingly　steady-state　electromagnetic　field　finite　element　analysis　of　the　TC-EHR　were　carried　out.　Finally,　the　test　prototype　was　fabricated　and　bench　tested.　The　braking　performance　and　overexcitation　characteristics　of　the　TC-EHR　were　analyzed　by　comparing　the　test　data　with　the　finite　element　simulation.　And　by　comparing　with　the　traditional　eddy　current　retarder　of　the　same　size,　it　is　verified　that　TC-EHR　has　higher　braking　power.　And　compared　with　the　normal　excitation　state,　the　braking　torque　of　TC-EHR　is　improved　by　about　20%　in　the　2-fold　overexcitation　state.　　©　2024　IEEE.