A method of controlling a three-phase permanent magnet synchronous motor

The present invention provides a method for controlling a three-phase permanent magnet synchronous motor, comprising a motor control method and the kinetic energy of an outer ring inner current control method of a three-phase permanent magnet synchronous motor as a whole, the kinetic energy stored in the feedback, via a given speed energy storage calculated and actual values ​​produced after a given power compared to accelerate the motor, together with the corresponding part of the losses and the load estimated value, divided by the induced electromotive force of the motor to produce a given value of q-axis current two-phase rotating coordinate system i * q and d-axis current reference value i * d. Then obtained successively by the current control method of the voltage inner loop setpoint U * q, U * d, by Park inverse transform, the DC link voltage Udc combined with a three-phase permanent magnet synchronous motor provided in an inverter, space vector pulse width by finally obtained three-phase modulation permanent magnet synchronous motor for driving a three-phase inverter switching sequence Sa, Sb, Sc signal. The method can greatly improve the dynamic response performance of a three-phase permanent magnet synchronous motor control system. The electric vehicle drive satisfies the like to the motor control response performance demanding applications.