With　single　current　sensor　between　the　DC　power　supply　and　bus　capacitance,　the　miniaturization,　low　cost　and　high　reliability　can　be　achieved　for　brushless　DC　motor　controller　featured　by　low　voltage　and　high　current.However,　it　is　a　challenge　that　the　phase　current　can＇t　be　detected　directly.　In　view　of　efficient　recovery　of　braking　energy　and　precise　torque　control,　the　synchronous　rectification　and　braking　control　for　the　controller　was　proposed.　The　commutation　characteristic　with　synchronous　rectification　and　braking　control　was　analyzed.　Then　the　DC-link　bus　current　based　phase　current　reconstruction　method　in　different　conduction　intervals　was　presented.Based　on　the　reconstruction　value,　the　phase　current　closed-loop　control　was　accomplished.　Simulation　and　experiment　results　show　that　the　phase　current　reconstruction　with　single　current　sensor　is　feasible,　and　the　synchronous　rectification　and　braking　control　is　suitable　for　brushless　DC　motor.　©　2018,　Editorial　Department　of　Journal　of　Beijing　University　of　Technology.　All　right　reserved.