Model Predictive Current Control Based on Dual Super-Twisting Sliding Mode Observers for PMSM Sensorless Drive

This article presents a model predictive current control (MPCC) based on dual super-twisting sliding mode observers (STOs) for permanent magnet synchronous motor (PMSM) sensorless drive. The dual STOs are applied to disturbance observation in current prediction and back electromotive force observation, respectively, enhancing the robustness of the control system. The conventional approach typically employs dual sliding mode observers (SMOs), but the inherent switching terms of SMO can generate high-frequency chatttering, which are exacerbated by the coupling between dual SMOs. Therefore, the use of Dual STOs effectively mitigates chattering and enhances both the accuracy of current loop control and the precision of position observation. Simulation results validate the effectiveness of the proposed algorithm.