Self-excitation Control of Squirrel-Cage Induction Motor based on Super-Twisting Sliding Mode Algorithm

For improving the stability of the engine driven self-excitation cage asynchronous generation system (EDS-CAGS) on the condition of the large range speed variation and the impact load, reducing the pulsation of the direct torque control (DTC), a new voltage space vector DTC is proposed based on the Super-Twisting control of the voltage-linkage outer subsystem and the K-class direct feedback linearization control of the current inner subsystem. EDS-CAGS simulation results show that, on the condition of the large range speed variation and the impact load, compared with the traditional voltage outer-loop and current inner-loop DTC method, by the new Super-Twisting sliding mode control method, the overshoot of the DC output voltage is reduced significantly, the response speed of the torque is fastened, the derivative values of the sliding mode variables can be convergence, and the robust stability of the EDS-CAGS is enhanced.