Hybrid　excitation　brushless　starter/generator　(HESG)　with　trapezoidal　back　EMF　is　promising　for　automotive　applications.　Dynamic　performance　improvement　of　generator　DC-link　voltage　is　important　to　the　increasingly　automotive　sensitive　devices.　However,　limited　dynamic　response　of　HESG　is　attributed　to　the　traditional　diode　rectification　with　large　time　constant　of　field　winding.　In　view　of　relatively　low　time　constant　of　armature　winding,　it　is　possible　to　improve　DC-link　voltage　dynamic　performance　by　regulating　armature　winding　current　of　HESG.　A　new　controlled　rectification　method　of　HESG　with　DC-link　ultracapacitor　is　proposed　in　the　paper,　and　no　additional　cost　is　attached　to　HESG　system.　What＇s　more,　diode　rectification　and　the　controlled　rectification　are　analyzed,　respectively.　Theory　calculation　and　experiment　results　show　that　the　dynamic　performance　of　DC-link　voltage　for　HESG　can　be　improved　with　the　controlled　rectification.　©　2014　IEEE.