During　the　design　of　the　dual　active　bridge　(DAB),　accurately　calculating　the　losses　and　the　temperature　rise　of　the　inductor　in　it　is　very　important　for　the　reliable　operation　of　the　whole　circuit　which　is　built　by　wide　band-gap　semiconductors.　This　paper　presents　a　general　method　for　accurate　and　convenient　inductor　current　characteristic　values　estimation　based　on　DAB　operating　characteristics.　This　paper　gives　a　model　for　calculating　the　core　loss　and　winding　loss　of　the　inductor　based　on　these　characteristic　values　and　gives　the　temperature　rise　caused　by　losses.　The　commutation　process　and　resonance　process　during　DAB　operation　are　analyzed,　and　two　kinds　of　magnetic　flux　density　loops　of　the　inductor　in　DAB　are　given.　An　experimental　platform　with　DAB　based　on　SiC　MOSFET　was　built.　The　experimental　results　show　that　the　errors　between　the　estimated　values　calculated　by　the　given　methods　and　the　measured　values　are　less　than　4%.　©　2022　IEEE.