关键词: 永磁同步电机, 新型滑模观测器, 模糊自适应控制, 饱和函数, 二阶滑模控制器

Abstract: To address the issues of chattering and estimation errors caused by fixed sliding mode gain in traditional sliding mode observers, a new type of sliding mode observer with adaptive adjustment of sliding mode gain was proposed. Based on the traditional sliding mode observer, a new reaching law was designed by combining the characteristics of power and exponential reaching rates. The sliding mode gain was combined with fuzzy control to dynamically adjust the sliding mode gain according to actual operating conditions. Using saturation functions instead of traditional symbolic functions to achieve continuous sliding mode control. A second-order sliding mode controller was designed in the current loop control to
replace the traditional PI controller. Steady-state and anti-interference simulations were conducted to compare the secondorder sliding mode  observer with traditional sliding mode observer. The simulation results showed that the improved sliding mode observer outperforms traditional sliding mode observers in both steady-state performance and anti-interference performance.

Key words: permanent magnet synchronous motor, new sliding mode observer, fuzzy adaptive control, saturation function, second-order sliding mode controller