基于巴特沃斯结构的改进磁链观测器的永磁同步电机无位置传感器控制  

Improved flux observer based on Butterworth filter for sensorless control of permanent magnet synchronous motor

作　　者：骆正红 胡亚山 LUO Zhenghong;HU Yashan(College of Electrical and Information Engineering,Hunan University,Changsha 410082,China)

机构地区：[1]湖南大学电气与信息工程学院,湖南长沙410082

出　　处：《电机与控制学报》2024年第9期60-69,共10页Electric Machines and Control

基　　金：湖南省自然科学基金(2023JJ30133)。

摘　　要：由于逆变器非线性因素、电流测量误差等非理想因素,传统的磁链观测器会受到直流分量以及谐波分量的影响,导致转子位置观测准确度降低。将具有通频带最大限度平坦特性的巴特沃斯带通滤波器与纯积分器相结合构建出一种改进的磁链观测器,并对改进的磁链观测器的传递函数进行了详细的理论分析,然后设计出一种离散化结构以便进行实验。结果表明,提出的基于巴特沃斯结构的改进磁链观测器具有出色的消除直流分量以及抑制谐波分量能力,不会造成基波处的幅值衰减以及相位误差,提高了永磁同步电机无位置传感器控制的转子位置观测准确度,同时具有良好的动态性能。The conventional rotor flux observer is affected by the DC offset and harmonics of the back e-lectromotive force caused by non-ideal conditions such as inverter nonlinearity and current measurement errors,which leads to a decrease in the accuracy of rotor position estimation.An improved flux observer was proposed by combining the Butterworth bandpass filter with the maximum flatness of the passband and the pure integrator,the transfer function of the proposed observer was analyzed theoretically,and its dis-cretized structure was designed for experiments.The results show that the proposed observer has an excel-lent ability to eliminate the DC offset and suppress harmonics,and then extracts the fundamental flux without amplitude attenuation and phase shift,which improves accuracy of rotor position estimation for permanent magnet synchronous motor and has good dynamic performance.

关 键 词：永磁同步电机 无位置传感器控制 巴特沃斯带通滤波器 磁链观测器 

分 类 号：TM351[电气工程—电机]