In this article, a sensorless field-oriented vector control strategy combined with an improved adaptive sliding mode observer and a back electromotive force (back EMF) observer is presented for a surface permanent magnet synchronous motor. First, based on a sliding mode, a current adaptive observer with estimation of back EMF is proposed to obtain the error of the back EMF, which can reduce system chattering. Then, a back EMF observer based on the back EMF error is constructed to adaptively track the rotor speed and position, which avoids complicated computation. Moreover, the stability of two observers is proved by using the Lyapunov stability theory. Finally, some simulations and experiments are given to show that the proposed method can track the changes of rotor speed and position with good characters, such as fast convergence, little chattering, and good robustness.

中文翻译：

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一种改进的中高速转子跟踪自适应滑模观测器

在本文中，针对表面永磁同步电机提出了一种结合改进的自适应滑模观测器和反电动势（反电动势）观测器的无传感器磁场定向矢量控制策略。首先，基于滑模，提出了一种具有反电动势估计的电流自适应观测器来获得反电动势的误差，以减少系统颤振。然后，构建了一个基于反电动势误差的反电动势观测器来自适应地跟踪转子速度和位置，避免了复杂的计算。此外，利用李雅普诺夫稳定性理论证明了两个观察者的稳定性。最后给出了一些仿真和实验，表明该方法能够跟踪转子速度和位置的变化，具有良好的特性，如收敛快，