摘要
在永磁同步电机的无传感器控制系统中,滑模观测器因其良好的鲁棒性而被广泛应用,但传统的滑模观测器由于切换函数的不连续性,使系统产生抖振,降低系统的动态性能。为此,提出一种基于tanh(x)函数的滑模观测器,并在滑模观测器中加入反电动势观测器来减小测量误差,采用锁相环技术简化转子位置估算,进一步提高了观测器性能。最后,通过稳定性分析、仿真实验、搭建实验平台表明改进后的滑模观测器误差更小、稳定性更好。
In the sensorless control system of permanent magnet synchronous motor(PMSM),sliding mode observer is widely used because of its good robustness.However,due to the discontinuity of the switching function,the traditional sliding mode observ⁃er produces chattering and reduces the dynamic performance of the system.Therefore,a sliding mode observer based on hyperbolic tangent function is proposed in this paper.The back EMF observer is added to the sliding mode observer to reduce the measurement error.The phase-locked loop technology is used to simplify the rotor position estimation and further improve the observer perfor⁃mance.Finally,through the stability analysis,simulation experiments and building the experimental platform,it shows that the im⁃proved sliding mode observer has smaller error and better stability.
作者
刘叶
杨光永
徐天奇
程满
黄卓群
LIU Ye;YANG Guangyong;XU Tianqi;CHENG Man;HUANG Zhuoqun(School of Electrical Information Engineering,Yunnan Minzu University,Kunming 650500)
出处
《计算机与数字工程》
2022年第10期2312-2316,共5页
Computer & Digital Engineering
基金
国家自然科学基金项目(编号:61761049,61261022)
云南省专业学位研究生优质课程项目资助。
