The　marine　controlled　source　electromagnetic　transmitter　is　a　crucial　device　of　marine　electromagnetic　method,　its　transient　state　and　steady　state　is　followed　with　interest.　In　this　paper,　an　improved　model　of　the　phase-shifted　full-bridge　converter　is　minutely　described　on　the　basis　of　some　specific　challenges　of　electromagnetic　transmitter　based　on　full-bridge　structure,　such　as　power　losses　and　duty-cycle　loss.　Then,　an　efficient　current-loop　compensator　designed　with　improved　model　proposed　in　this　paper　is　mentioned.　The　comparative　analysis　and　simulation　results　of　the　improved　model　and　the　traditional　model　could　prove　the　superiority　of　the　improved　to　the　system　response　speed　and　control　stability.　The　electromagnetic　transmitter　could　achieve　better　transient　state　and　steady　state　characteristics　by　the　compensator　designed　with　the　improved　model.　(C)　2017　The　Authors.　Published　by　Elsevier　Ltd.