基于浸入与不变观测器的永磁同步电机无传感器控制  

Sensorless Control of Permanent Magnet Synchronous Motor Based onImmersion and Invariance Observer

作　　者：贺伟 严凌云 HE Wei;YAN Lingyun(Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology,Nanjing University of Information Science&Technology,Nanjing 210044,China;School of Automation,Nanjing University of Information Science&Technology,Nanjing 210044,China)

机构地区：[1]南京信息工程大学江苏省大气环境与装备技术协同创新中心,南京210044 [2]南京信息工程大学自动化学院,南京210044

出　　处：《组合机床与自动化加工技术》2024年第10期89-94,共6页Modular Machine Tool & Automatic Manufacturing Technique

基　　金：国家自然科学基金项目(62173205)。

摘　　要：针对永磁同步电机,基于浸入与不变(immersion and invariance,I&I)理论构建反电动势和负载转矩观测器,从而提出无传感控制方案。首先,用低通滤波器对电机的电压与电流信号进行滤波处理;然后,通过分析滤波前后的信号,应用I&I理论建立不变流形,根据不变流形的稳定性与可控性,提出系统自适应律来构建反电动势观测器,并根据得到的反电动势的估计值,采用反正切法求解转子位置和速度的估计值;其次,基于I&I理论利用转速估计值构建负载转矩观测器以得到负载转矩估计值;最后,采用反步法基于估计的转速与负载转矩设计了转速环控制器并证明了闭环稳定性,实现了永磁同步电机的无传感器控制。仿真研究结果表明,在带有未知负载扰动的情况下,与传统PI控制器下的滑模观测器法相比,基于I&I观测器法具有更好动态响应能力和更强的鲁棒性。For permanent magnet synchronous motors(PMSM),a sensorless control scheme is proposed based on the immersion and invariance(I&I)theory to construct observers for back electromotive force(back-EMF)and load torque.Firstly,a low-pass filter is used to filter the signals of motor voltage and current.Then,by analyzing the filtered and unfiltered signals,an invariant manifold is constructed using the I&I theory.According to the stability and controllability of the invariant manifold,an adaptive law is proposed to construct an observer for back-EMF.Based on the estimated back-EMF,the rotor position and speed are estimated using an arctangent method.Subsequently,using the estimated speed,a load torque observer is constructed based on the I&I theory to obtain the load torque estimation.Finally,a speed loop controller is designed based on the estimated speed and load torque using the backstepping method,and the closed-loop stability is proved.The simulation research results indicate that,in the presence of unknown load disturbances,the I&I observer-based method exhibits better dynamic response capability and stronger robustness compared to the sliding mode observer method under traditional PI control.

关 键 词：永磁同步电机 浸入与不变 不变流形 负载转矩估计 无传感器控制 

分 类 号：TH165[机械工程—机械制造及自动化] TG659[金属学及工艺—金属切削加工及机床]