基于新型SMO的PMSM无传感器控制  

Sensorless Control of PMSM Based on Novel SMO

作　　者：林巨广[1] 王涛[1] 李晶晶[1] LIN Ju-guang;WANG Tao;LI Jing-jing(School of Mechanical Engineering,Hefei University of Technology,Hefei 230009,China)

机构地区：[1]合肥工业大学机械工程学院,合肥230009

出　　处：《组合机床与自动化加工技术》2022年第12期53-56,共4页Modular Machine Tool & Automatic Manufacturing Technique

基　　金：安徽省科技重大专项(201903a05020011)。

摘　　要：为降低传统滑模观测器(SMO)在估算电机转速和转子位置时的高频抖振,分析设计了一种新型滑模观测器。该滑模观测器引入了新型复合指数函数,改善传统滑模观测器因使用开关函数造成估算值抖动过大的问题;同时采用锁相环(PLL)代替反正切函数和相位补偿,避免将抖振直接引入反正切函数从而导致高频抖振的误差被放大,以提高观测器估算精度。经仿真验证,该观测器能够很好地观测和跟踪电机转速和其转子位置,能有效抑制高频抖振,提高滑模观测器估算精度,且能保持良好的鲁棒性。In order to reduce the high-frequency chattering of traditional sliding mode observer(SMO)in estimating motor speed and rotor position,a new sliding mode observer is designed.The sliding mode observer introduces a new composite exponential function to improve the problem of excessive estimation jitter caused by the use of switching function in the traditional sliding mode observer.At the same time,phase locked loop(PLL)is used to replace the arctangent function and phase compensation to avoid the direct introduction of chattering into the inverse tangent function,which leads to the amplification of the error of high-frequency chattering,so as to improve the estimation accuracy of the observer.The simulation results show that the observer can well observe and track the motor speed and its rotor position,effectively suppress the high-frequency chattering,improve the estimation accuracy of the sliding mode observer,and maintain good robustness.

关 键 词：永磁同步电机 滑模观测器 无传感器控制 低通滤波器 指数函数 

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]