Practical Non-singular Terminal Sliding Mode Control Based Improved Extended State Observer for IPMSM Speed Regulation

The aim of this paper is to design a novel practical non-singular terminal sliding mode control (PNSTSMC)with improved extended state observer (IESO) for the IPMSM speed regulation system. Firstly, for the sake of improving the dynamic response, based on the hyperbolic tangent function, the PNSTSMC method is proposed. The proposed PNSTSMC can realize global fast convergence. Then, the IESO under softsign function is introduced to estimate the total disturbance of the IPMSM system. Further, experimental results are presented to verify the superiority of the proposed method.