【摘要】 在永磁同步电机(PMSM)控制系统中，传统PI控制器因结构简单、易于实现而得到广泛应用，但在系统快速性与超调之间存在矛盾。为了解决以上问题，提出一种以线性自抗扰控制(LADRC)为核心的PMSM无位置传感器控制方法。首先，针对线性扩张状态观测器(LESO)对系统扰动估计负担过大导致系统控制性能降低的问题，通过设计降阶观测器对系统的负载扰动进行观测，并将获取的扰动补偿到控制器以减少LESO对系统扰动的估计负担，提高LESO对扰动的估计精确度、增强系统控制性能；其次，为了实现无位置传感器控制，将电机方程中的反电动势纳入未知扰动并利用LESO对其进行估计；最后，从估计的反电动势中提取转速和转子位置信息。通过仿真和实验表明，采用LADRC所控制的PMSM系统具有更高控制精确度和更强的抗扰性能，而且利用LESO所估计的转速精确度高、鲁棒性强。更多还原

【Abstract】 In the permanent magnet synchronous motor(PMSM) control system, the conventional PI controller is widely used because of its simple structure and easy implementation, but there is a contradiction between system speed and overshoot. In order to solve the above problems, a PMSM without position sensor control method with linear active disturbance rejection control(LADRC) as the core is proposed. First, to address the problem that the linearly expanding state observer(LESO) is overburdened with the estimation of system disturbances, which leads to the degradation of system control performance, we design a reduced-order observer to observe the load disturbances of the system and compensate the obtained disturbances into the controller to reduce the estimation burden of LESO on system disturbances, improve the estimation accuracy of LESO on disturbances, and enhance the system control performance.Second, in order to realize the position sensorless control, the back-electromotive force in the motor equation was incorporated into the unknown disturbance and estimated by LESO, and finally, the speed and rotor position information were extracted from the estimated back-electromotive force. Simulations and experiments show that the PMSM system controlled by LADRC has higher steady-state accuracy and stronger immunity to disturbances, and the speed estimated by LESO has high accuracy and robustness.更多还原