基于改进滑模观测器的无传感PMSM控制系统研究  

Study of Sensing-Free PMSM Control System Based on Improved Sliding Mode Observer

作　　者：盖明均 刘光柱 马文博 宋倩男 武乐林 GAI Mingjun;LIU Guangzhu;MA Wenbo;SONG Qiannan;WU Yuelin(School of Microelectronics,Hefei University of Technology,Hefei 230009,China;Wuxi I-Core Electronics Co.,Ltd.,Wuxi 214063,China)

机构地区：[1]合肥工业大学微电子学院,合肥230009 [2]无锡中微爱芯电子有限公司,无锡214063

出　　处：《组合机床与自动化加工技术》2024年第11期99-103,109,共6页Modular Machine Tool & Automatic Manufacturing Technique

摘　　要：传统滑模观测器转速和角度的估算误差较大,其误差主要来自于符号函数引起的高频抖振、逆变器谐波、低通滤波器相位补偿的不精确以及噪声对反正切运算的干扰。针对这些误差源,对开关函数、滑模观测器结构、滤波器以及角度和转速获取这几方面进行研究和改进来减小误差。改进的滑模观测器使用新型正弦分段复合函数代替传统符号函数,减小了抖振;采用高阶滑模结构,并使用复系数滤波器过滤高次谐波,进一步抑制抖振;使用归一化锁相环提取转子位置和转速信息,提高了角度和转速的观测精度。实验表明,采用改进的滑模观测器,转速误差降低50%,角度误差降低66%。Traditional sliding mode observers have significant estimation errors in speed and angle.These errors mainly come from high-frequency chattering caused by the sign function,inverter harmonics,imprecise phase compensation of low-pass filters,and the interference of noise on arctangent operation.Regarding these error sources,by studying and improving the switching function,sliding mode observer structure,filter,angle and speed estimation,errors can be reduced.A new type of sine piecewise composite function instead of the traditional sign function is adopted in this improved sliding mode observer to reduce the chattering;High-order sliding mode and complex coefficient filters are used to filter out higher-order harmonics and to further suppress chattering;Normalized phase-locked loop is used to extract rotor position and speed information to improve the observation accuracy of angle and speed.Experiments show that this improved sliding mode observer can reduce speed error with 50%and angle error with 66%.

关 键 词：永磁同步电机 滑模观测器 分段复合函数 复系数滤波器 转速误差 角度误差 

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]