Direct torque control system using space vector modulation for bearingless induction motor based on active disturbance rejection controller

In allusion to the characteristic of multi-variable, nonlinear and high coupling of bearingless induction motor, direct torque control system with space vector modulation for bearingless induction motor is built by using active disturbance rejection controller (ADRC) technology. The stator flux and air-gap flux are realized through the rotor flux identification. The problem of speed overshoot is solved by using active disturbance rejection controller insteading of the traditional PID controller. The simulation results show that the system has good dynamic performance, and also has a strong robustness for load disturbance and motor parameter variation.