To　overcome　the　large　power　consumption,　the　braking　torque　heat　recession,　and　installation　difficulties　for　trailers　of　eddy　current　retarder　(ECR),　a　novel　self-excited,　liquid-cooled,　and　bridge　integrated　retarder　(SLB-EMR)　is　proposed　in　this　paper.　The　structure　and　work　principle　of　the　SLB-EMR　are　described　particularly.　Based　on　the　magnetic　equivalent　circuit　(MEC)　method,　an　analytical　model　of　the　eddy　current　braking　torque　considering　magnetic　flux　leakage　and　end　effect　is　established.　The　power　generation　and　braking　performance　of　the　SLB-EMR　are　predicted　by　the　finite　element　analysis　(FEA).　We　carried　out　tests　for　the　eddy　current　braking　torque,　the　heat-fade　of　braking　torque,　the　no-load　loss　torque,　and　natural　characteristics　of　the　SLB-EMR　respectively.　The　test　results　showed　that　the　eddy　current　braking　torque　reached　2592　N　center　dot　m　at　1000　r/min.　The　braking　torque　declined　by　15.5　%　after　the　braking　12　min　continuously.　The　analytical　model　of　eddy　current　braking　torque,　and　FEA　model　of　the　generator　and　eddy　current　brake　were　verified　by　the　test.　Compared　with　the　ECR,　the　SLB-EMR　had　no-power　consumption　and　low　head-fade.