Study on Flux Estimated Model of Electrical Excitation Synchronous Motor

在交流调速领域，电动机磁链的精确控制是实现电励磁同步电机高性能控制的关键。在对电励磁同步电动机的磁链进行观测时，电流模型易受电动机参数变化的影响并且为开环控制，观测不准确；传统电压模型存在直流偏置和积分误差。针对上述问题，文章通过对静止坐标系下电励磁同步电机的数学模型分析，构建了基于锁相环的新型电压模型观测器、基于无位置传感器的非线性磁链观测器和基于状态方程的龙伯格磁链观测器，并在MATLAB/Simulink环境下进行仿真验证，以及在动态响应、估算转速波动和角度跟踪误差方面进行对比分析，验证了这三种磁链观测器模型在电励磁同步电机高性能控制中的可行性和优越性。In the field of communication speed regulation, precise control of motor magnetic flux is crucial for achieving high-performance control of electrically excited synchronous motor (EESM). When observing the magnetic flux of EESM, the current model is easily affected by changes in machine parameters and operates in an open-loop manner, leading to inaccurate measurements. Additionally, traditional voltage models suffer from DC biases and integral errors. In response to the above issues, a new voltage model observer based on a phase-locked loop, a nonlinear magnetic flux observer based on position sensorless, and a Lomberg magnetic flux observer based on state equation was constructed through mathematical model analysis of EESM in a static coordinate system. Simulation verification was carried out in MATLAB/Simulink environment, and comparative analysis was conducted in dynamic response, speed estimation fluctuation, and angle tracking error to verify the feasibility and superiority of the three magnetic flux observer models in high-performance control of EESM.