Brushless double-fed motor driving system of electric vehicle and control method thereof

The invention belongs to the fields of a driving device of an electric vehicle and a hybrid electric vehicle, and a control method thereof. The driving system provided by the invention comprises a brushless double-fed motor, a stator inverter, a rotor inverter, a stator/rotor winding relay control circuit, a motor driving and control module, a complete electric vehicle controller, an accumulator, a battery management unit and a current-voltage speed sensor, wherein the ports of the stator inverter and rotor inverter are respectively connected with the port of the accumulator; the port of the motor driving and control module is respectively connected with the ports of the stator inverter and rotor inverter; and the port of the motor driving and control module is connected with the port of the stator/rotor winding relay control circuit. The control method provided by the invention mainly comprises the following steps: judging the running state of a driving motor; and if the driving motor is in an asynchronous running state or a double-fed running state or the stator and rotor inverters have faults, successively and respectively executing the corresponding subprograms. The invention can enhance the control moment of a high-speed region of the vehicle, enlarge the speed regulating range, increase the recovery rate of energy and enhance the continuous voyage mileage of the electric vehicle.