New Non-Singular Fast Terminal Sliding Mode Control of Permanent Magnet Synchronous Motor Based on Super-Twisting Sliding Mode Observer

To address the problem of traditional speed loop controllers being unable to achieve rapid system convergence in the face of complex external operating conditions, this paper designs a new nonsingular fast terminal sliding mode control algorithm (NNFTSMC) for PMSM with a super twisting sliding mode perturbation observer (STSMO). Firstly, the mathematical models of PMSM for ideal case and parametric composite uptake are established. Secondly, a new non-singular fast terminal sliding mode control surface (NNFTSM) is proposed to design the PMSM speed-loop controller, which is also paired with the STSMO to observe the total system perturbation in real time and compensate the perturbation to the speed-loop NNFTSMC controller to form a new composite controller of NNFTSMC+STSMO. Finally, the proposed composite control algorithm of NNFTSMC+STSMO is verified to be effective in improving the control of the PMSM drive system during the parameters and load mutation by comparing simulation and RT-Lab semi-physical experiments. © 2024, Electromagnetics Academy. All rights reserved.