The invention discloses a winding open-circuit type
permanent magnet motor vehicle starting and generating
system and a control method. The
system comprises a winding open-circuit type
permanent magnet motor, a three-phase
rectifier bridge, a three-phase bridge converter, a
changeover switch, a
filter capacitor, a storage battery, a controller, a
voltage and current test circuit, a drive circuit and a load. In the method, one side of the winding head of the winding open-circuit type
permanent magnet motor forms a rectifying side to supply power to the load through the three-phase
rectifier bridge and the
filter capacitor, and the other side is connected with the three-phase bridge converter and the storage battery to form an inversion control side. The
changeover between the starting operation state and the generating operation state is realized through the
changeover switch, starting control adopts single-current
closed loop vector control, generating operation adopts rectifying side
DC voltage and motor-phase current double
closed loop control, and stable output
voltage and generator high-efficiency operation control are realized. The winding open-circuit type permanent
magnet motor starting and generating
system can effectively meet the requirements of wide revolution operating range,
high power density and high efficiency of a vehicle starting generator.