The simulation of induction motor direct torque control

The mathematical model of induction motor is established with space vector method and the Matlab Simulink library is used to build the entire simulation system.Induction motor modules,inverter module and the control module are described.The torque and stator flux are calculated in the stator coordinate system.According to the torque value and the value of the stator flux,the control switch is issued.Compared with the vector control,direct torque control can eliminate the complex coordinate transformation,and overcome the dependence on the rotor parameters,showing fast torque response.Results of simulation show that the direct torque control of induction motor has good control effect.