Comparative Analytical Study of Asynchronous Motor Control Methods for Straddle Mounted Monorail Vehicle Test Stands

Abstract Taking the control of high-power asynchronous motor in the straddle monorail vehicle test bench as the research object, the direct torque control (SVM-DTC) based on space vector pulse width modulation (SVPWM) and the vector control based on space vector pulse width modulation (SVM-FOC) method are analyzed in detail. The simulation system model of SVM-DTC and SVM-FOC for high-power asynchronous motor is established by using MATLAB / Simulink. Combined with the test method of the straddle monorail vehicle test bench, the control capacity requirements of the test bench are studied, based on which the simulation model is targeted to input speed and torque signals, and the speed control curve responsiveness, torque control curve responsiveness and torque fluctuation of the asynchronous motor under the two control methods are compared. The results show that the direct torque control based on SVPWM has the superior performance of small torque fluctuation, accurate speed control, fast torque response and strong robustness, which should be prioritized in the selection of the electrical system control scheme of the test bench.