针对传统全阶滑模观测器在运行过程中系统抖振大及观测精度低的问题，提出了一种可控边界层的全阶滑模控制策略。引入归一化锁相环进行转速估计，避免参数变化对估计值的影响，使转子位置识别更加精确。利用Lyapunov方程证明了算法的稳定性。最后通过仿真和试验验证了改进型全阶滑模观测器无传感控制策略的可靠性和准确性。

Aiming at the problems of system chattering and low observation accuracy of the traditional full order sliding mode observer during operation, a full order sliding mode control strategy with controllable boundary layer is proposed. A normalized phase-locked loop is introduced for rotational speed estimation to avoid the effect of parameter variations on the estimated value and to make the rotor position identification more accurate. The stability of the algorithm is demonstrated using the Lyapunov equation. Finally, the reliability and accuracy of the improved full order sliding mode observer sensorless control strategy are verified through simulation and experiments.