关键词: 表贴式永磁同步电机, 无传感器控制, 高阶超螺旋观测器, 扩张状态, 滑模观测器, 非奇异快速终端滑模面

Abstract: To solve the problems of inherent chattering and non-finite-time convergence of sliding mode observer ( SMO) in sensorless control of surface-mounted permanent magnet synchronous motor ( SPMSM) , this study proposes a high-order super-twisting nonsingular fast terminal SMO ( HOSTNFTSMO) . Based on the PMSM extended state model, a high-order super-twisting observer ( HOSTO ) is proposed to achieve chattering suppression. Secondly, to address the
problem of noise introduced by the differential term in the terminal sliding mode surface, a new non-singular fast terminal sliding mode surface ( NFTSMS) is designed to achieve finite-time convergence of state variables. Simulation results show that the HOSTNFTSMO studied in this paper can achieve high position estimation accuracy without sacrificing the robustness of its compared to the traditional SMO.

Key words: surface-mounted permanent magnet synchronous motor ( SPMSM), sensorless control, high-order spuertwisting observer( HOSTO), extended state, sliding mode observer( SMO), non-singular fast terminal sliding mode surface( NFTSMS)