Direct Torque Control of Interior Permanent Magnet Synchronous Motors Based on Sensorless Control and Fuzzy Controller

The direct torque control Based on position sensor less control method and fuzzy controller was carried out aiming at the interior permanent magnet synchronous motor (IPMSM) in this paper. To the consideration of electric vehicle space is limited and to reduce the controller size to save space, this paper studied the sensor less control. Hysteresis comparator of direct torque control easily results in high switching frequency of the inverter and may result in chaos, this paper studied the fuzzy controller. Meanwhile, in order to improve the control rapidity as much as possible of the electric vehicle, take direct torque control as a control method of the driving motor. Finally, designed the fuzzy sensor less direct torque controller and studied its simulation. Simulation results show that the control system have good dynamic and static characteristics, and can reduce the torque ripple and avoid chaotification in motor start-up stage.