基于准滑模观测器的PMSM无位置传感器控制  

Sensorless Control of PMSM Based on a Quasi-sliding Mode Observer

作　　者：杜栩扬[1] 胡育文[1] 鲁文其[1] 黄文新[1] 梁骄雁[1] 

机构地区：[1]南京航空航天大学自动化学院,江苏南京210016

出　　处：《电气传动》2010年第5期32-35,66,共5页Electric Drive

摘　　要：针对基于传统滑模观测器的无位置传感器控制抖振大、低速估算性能差等缺点,在分析永磁同步电动机(PMSM)数学模型的基础上,引入了一种新型准滑模观测器进行转子位置估算。切换函数采用饱和函数代替开关函数,通过选择合适的边界层厚度,有效削弱了抖振;并将估算反电势的反馈值引入到观测器模型,通过选择合适的反馈系数,提高了转子位置估算的精度,并扩大了其低速下的适用范围。仿真和实验结果证明了该方法的可行性和有效性。Due to the chattering problem and poor performance at low speed existed in traditional sliding mode observer,based on analyzing the mathematic model of PMSM,a novel quasi-sliding mode observer for sensorless control of PMSM was introduced.The sign function is replaced by a saturation function,a valid boundary can solve the chattering problem;the estimated back electric move force（EMF） is feedback to the state observer,a appropriate rate of feedback EMF can improve the precision of the rotor position estimation and enlarge application range at low speed.The simulative and experimental results demonstrate the feasibility and validity of the new algorithm.

关 键 词：滑模观测器 无位置传感器 永磁同步电动机 

分 类 号：TM341[电气工程—电机]