【摘要】 中高速时永磁同步电机无位置传感器控制系统中传统滑模观测器会存在较大估计误差，根据超螺旋算法，在保证稳定性前提下设计了一种增益值随估计转速变化的变增益超螺旋滑模观测器，实现对转速和转子位置估计精度的提高。针对无位置传感器控制方法中鲁棒性较差问题，在变增益超螺旋滑模观测器估计出转速的基础上，提出一种基于新型趋近律和新型负载转矩观测器的滑模转速控制器，用于提高整个控制系统的动态响应和鲁棒性。根据李雅普诺夫稳定性理论对所提出的新型趋近律和负载转矩观测器进行了稳定性证明，通过仿真和实验证明，改进滑模无位置传感器控制系统能够提高转速估计的精度和控制系统的鲁棒性。更多还原

【Abstract】 For the problem that the traditional sliding mode observer has large estimation error when the sensorless control method of permanent magnet synchronous motor is used in moderate and high speeds, a changeable gain super-twisting sliding mode observer is proposed. The gain of this observer changed with the estimated speed. On the premise of ensuring the stability, this observer was aimed to enhance the estimation precision of speed and rotor position on the basis of the super-twisting algorithm. To address the issue of poor robustness in sensorless control system, a sliding mode speed controller based on a fresh approach law and a load torque observer was proposed to increase the dynamic response and robustness of the whole control system. The stability of the proposed approach law and load torque observer was demonstrated in terms of Lyapunov stability theory. Simulations and experiments prove that the modified sliding mode sensorless control system can enhance the accuracy of speed estimation and the robustness of the control system.更多还原