【摘要】 针对永磁同步电机(PMSM)无位置传感器控制中基于反电势传统算法的局限性，以及速度环PI控制器在超调和响应速度之间难以权衡、抗扰能力较弱的问题，提出一种非线性磁链观测器与新型复合滑模速度控制器相结合的无位置传感器控制方法。利用非线性磁链观测器对转子角度和电机速度进行精确估计；设计了一种新型自适应快速滑模控制器，实现改进速度环控制与无感观测的最优匹配，从而提升系统的响应速度并有效抑制了超调；同时，为改善传统无位置传感器控制中抗扰能力不足的问题，引入滑模扰动观测器，增强系统的抗干扰性能；最后，通过仿真与实验分别验证了所提方法的有效性和优越性。结果表明，该方法在动态响应、超调抑制及抗扰性能方面均优于传统控制策略。更多还原

【Abstract】 To address the limitations of traditional back-EMF-based algorithms in sensorless control of permanent magnet synchronous motors(PMSM) and the difficulty in balancing overshoot and response speed in the velocity loop PI controller, as well as its weak disturbance rejection capability, a sensorless control method combining a nonlinear flux observer and a composite sliding mode speed controller was proposed, in which a nonlinear flux observer was utilized to accurately estimate the rotor angle and motor speed. A novel adaptive fast sliding mode controller was then designed to achieve optimal matching between the improved speed loop and sensorless observation, thereby enhancing system response speed and effectively suppressing overshoot. Additionally, to improve the disturbance rejection capability of traditional sensorless control, a sliding mode disturbance observer was introduced to enhance system robustness. Finally, simulations and experiments verify effectiveness and superiority of the proposed method. The results demonstrate that the proposed approach outperforms traditional control strategies in terms of dynamic response, overshoot suppression, and disturbance rejection performance.更多还原