To　improve　the　power　density　of　fast-response　and　easily　controlled　eddy　current　brakes　for　heavy-duty　vehicles,　the　method　of　constructing　a　three-dimensional　magnetic　circuit　by　using　axially　convex　toothed　coils　and　overexcitation　design　technology　are　proposed.　Based　on　the　finite　element　method,　the　steady-state　and　quasi-steady-state　electromagnetic　field　calculation　models　of　the　novel　high-energy　eddy　current　brake　and　two　traditional　eddy　current　brakes　are　established,　and　their　magnetic　circuit,　air　gap　magnetic　density,　eddy　current　distribution　and　overexcitation　braking　characteristics　are　analyzed.　The　results　show　that　the　eddy　current　of　the　novel　high-energy　eddy　current　brake　is　distributed　in　the　whole　axial　space　on　the　inner　surface　of　the　rotor.　When　the　speed　is　less　than　3　500　r　/　min,　its　braking　torque　is　significantly　higher　than　the　other　two　traditional　eddy　current　brakes.　And　the　overexcitation　design　can　effectively　improve　the　braking　performance.　Since　the　coil　current　density　is　increased　to　3　times,　the　braking　torque　is　increased　by　0.　65　times,　which　can　provide　instantaneous　high　torque　for　vehicle　emergency　braking　and　shorten　the　braking　distance　of　the　vehicle　by　30%　.　©　2023　China　Ordnance　Society.　All　rights　reserved.