Sensorless Control of PMSM via ADRC and SMC with Super-Twisting Observer

This study explores in depth an innovative control strategy specifically for permanent magnet synchronous motors (PMSMs) that do not require position sensors. The control strategy combines advanced technologies of superspiral sliding mode observer (STSMO), active anti-disturbance control (ADRC) and sliding mode controller (SMC). Among them, STSMO, with its excellent observation algorithm, can provide accurate estimates of motor state in complex environments full of high-frequency noise and constantly changing system parameters. On this basis, we design a sliding mode controller to adjust the motor current, which ensures fast response speed and high control accuracy. At the same time, the introduction of ADRC further optimizes motor speed regulation, significantly improving the robustness of the system by estimating and compensating for internal motor uncertainties and external disturbances. Through simulation experiments, we verify the effectiveness of this control strategy, and confirm that it can achieve high performance control of PMSMs under sensorless conditions, showing excellent dynamic response speed and excellent steady-state performance.