An Improved Active Disturbance Rejection Control for Speed Control of Permanent Magnet Synchronous Motor Using Reduced-Order Extended State Observer - Zhao, Xiaolong; Chen, Yiguang; Sun, Ruxi; Cui, Enming (2024 27th International Conference on Electrical Machines and Systems (ICEMS), Electrical Machines and Systems (ICEMS), 2024 27th International Conference on, 2024)