关键词: 永磁同步电机, 无感控制, 抖振抑制, 相位延迟, 高阶终端磁链滑模观测器, 滤波, 跟踪微分器, 终端吸引子

Abstract:

To address the problems of large sliding mode chatter and phase delay in the traditional first-order flux sliding mode observer, a HOT-FSMO(High-Order Terminal Flux Sliding Mode Observer)based on an improved tracking differentiator is proposed in this study. A high-order sliding mode control law is designed to achieve chatter suppression of flux linkage estimation, and a new tracking differentiator with low chatter containing a terminal attractor is combined to replace the conventional low-pass filter to achieve accurate tracking of the flux linkage and rotor position, as well as filtering functions. The experimental results show that the HOT-FSMO based on the novel tracking differentiator can effectively reduce the sliding mode chattering and decrease the position estimation error, while speeding up the system response and improving the system dynamic performance under different speed and load conditions when compared with the traditional linear flux linkage sliding mode observer.

Key words: permanent magnet synchronous motor, sensorless control, chattering suppression, phase delay, HOT-FSMO, filtering, tracking differentiator, terminal attractor