Research on Direct Torque Control Based on PI Regulators

Direct torque control (DTC) method with PI produced a voltage space vector based on Torque PI regulator and stator flux PI regulator.The reference voltage space vector was available through coordination rotation transformation.The vector could compensate for the errors of torque and stator flux in an inverter switching period.Space vector pulse width modulation (SVPWM) pattern was used to keep the frequency of inverter constant.Simulation research of PI-DTC system with Simulink in Matlab shows the validity of this method.