To　realize　the　function　of　automotive　engine　stop-start,　it　is　promising　that　traditional　independent　starter　and　generator　in　automobile　are　replaced　by　the　integrated　starter/generator　(ISG),　which　contributes　to　energy　conservation　and　emission　reduction.　Hybrid　excitation　starter/generator　is　a　potential　selection　for　the　ISG,　which　has　high　efficiency　over　extensive　working　range,　high　power　density,　low　maintenance,　and　high　reliability　without　brushes.　The　consequent-pole　permanent　magnet　(CPPM)　brushless　direct-current　generator　(BLDCG)　electromotive　force　(EMF)　is　designed　to　the　trapezoidal　wave.　The　trapezoidal　wave　electromotive　force　CPPM　motor　is　different　from　the　existing　sine　wave　electromotive　force　CPPM　motor.　It　has　the　advantages　of　high　power　density,　small　direct-current　(DC)　voltage　harmonic　ripple,　only　requiring　low　cost　and　low　resolution　Holzer　position　sensor,　simple　control　and　other　advantages.　The　CPPM　motor　can　output　stable　voltage　in　the　wide　speed　range.　However,　the　normal　brushless　DC　generator　needs　to　match　the　complex　power　converter.　Therefore,　The　CPPM　motor　is　a　new　type　of　motor　used　for　electric　vehicle.　This　kind　of　motor　has　a　good　prospect　in　the　application　of　the　ISG　of　automobile.　Generally,　the　excitation　current　regulation　combined　with　diode　rectification　is　adopted　to　meet　the　requirement　of　alternator　technical　specification.　However,　the　large　time　constant　of　about　100　ms　in　excitation　winding　will　cause　DC-link　voltage　drop　and　lead　to　abnormal　operation　of　automotive　sensitive　device,　such　as　engine　control　unit,　and　radio.　In　generating　mode,　the　CPPM　BLDCG　can　be　seen　as　hybrid　excitation　brushless　DC　generator.　In　view　of　relatively　low　time　constant　in　armature　winding　of　CPPM　BLDCG,　it　is　possible　to　improve　DC-link　voltage　dynamic　performance　by　regulating　armature　winding　current.　This　paper　takes　CPPM　BLDCG　of　14　V　as　the　research　object　and　aims　to　shorten　the　time　of　voltage　recovery.　With　the　method　of　controlled　rectification　without　increasing　hardware　cost,　the　dynamic　adjustment　process　of　voltage　is　analyzed,　and　the　theoretical　calculation　and　experiment　of　voltage　recovery　time　under　2　different　modes　of　controlled　rectifier　and　diode　rectifier　are　completed.　BLDCG　CPPM　is　controlled　by　the　combination　of　the　traditional　diode　rectifier　and　the　electric　field　regulation.　Its　DC　voltage　recovery　time　is　influenced　by　the　time　constant　of　the　excitation　winding,　which　is　at　the　100　ms　level.　The　dynamic　response　speed　of　BLDCG　CPPM　is　maintained　at　a　lower　level.　A　controlled　rectification　method　is　proposed　to　improve　DC-link　voltage　recovery　time　of　CPPM　BLDCG.　In　view　of　the　fast　energy　storage　and　release　in　armature　winding,　the　voltage　recovery　speed　is　increased　by　improving　the　total　EMF　of　armature　winding.　The　method　needs　no　additional　hardware　cost.　In　addition,　the　method　can　be　extended　to　hybrid　excitation　motor　with　other　structures.　Dynamic　process　of　CPPM　BLDCG　with　controlled　rectification　and　ultra-capacitor　is　analyzed　by　the　state-space　average　method.　Theory　calculation　and　experiment　on　the　controlled　and　diode　rectification　are　separately　completed.　The　results　show　that　the　voltage　recovery　time　with　the　controlled　rectification　is　almost　the　half　of　that　with　the　diode　rectification.　The　reason　is　that　the　controlled　rectifier　using　BLDCG　CPPM　armature　windings　to　achieve　rapid　energy　storage　and　release,　can　effectively　improve　the　armature　winding　EMF,　and　thus　can　shorten　the　voltage　regulation　time.　It　is　of　great　significance　to　improve　the　reliability　of　the　on-board　sensitive　electronic　equipment.　Therefore,　this　kind　of　controllable　rectification　method　has　a　good　prospect　in　the　automobile　ISG　application　aspect.　©　2016,　Editorial　Department　of　the　Transactions　of　the　Chinese　Society　of　Agricultural　Engineering.　All　right　reserved.