Speed sensorless control systems with a full order adaptive observer of the permanent magnet synchronous motor (PMSM) have received wide attention due to their advantages of simple structure, easy implementation and strong universality. However, they are sensitive to the load disturbances, which affects the speed performance of the control system. To solve this problem, this paper presents a disturbance rejection speed sensorless control of PMSMs based on full order adaptive observer to improve robustness against load disturbances. A load disturbance observer (LDO) is used to observe load disturbances, which feed-forward compensates the q-axis current to reduce the speed drop and accelerate the recovery time. Experimental results show that the proposed method has better anti-interference capability than full order adaptive speed sensorless control under the same steady-state performance.

具有结构简单，易于实现且通用性强的优点，带有永磁同步电动机（PMSM）的全阶自适应观测器的无速度传感器控制系统受到了广泛的关注。但是，它们对负载干扰很敏感，这会影响控制系统的速度性能。为了解决这个问题，本文提出了一种基于全阶自适应观测器的永磁同步电机无扰动速度无传感器控制，以提高其抗负载扰动的鲁棒性。负载扰动观察器（LDO）用于观察负载扰动，其前馈补偿q轴电流可减少速度下降并加快恢复时间。实验结果表明，在相同稳态性能下，该方法比全阶自适应无速度传感器控制具有更好的抗干扰能力。