An improved directtorque control technology study for permanent magnet synchronous motor

For the torque ripple and flux pulsation big shortcomings of direct torque control (DTC) for permanent magnet synchronous-motor (PMSM) , the paper proposed an improved direct torque control strategy. Based on the SVPWM of DTC method for PMSM, the paper proposed an improved DTC according to the flux linkage error space Vector modulation ( FESVM ). The paper analysed the working principle of the improved DTC strategy, and built the mathematical model and simulated in the Matlab/Simulink Comparsion to common DTC strategy for PMSM, the improved DTC strategy could significantly reduce the torque ripple and flux pulsation , and the system performance could become better according to the simulation results. Therefore, the improved DTC method proved a new thought for PMSM control system study.