基于高阶广义积分器的改进型直线振荡电机无位置传感器控制  

Improved Position Sensorless Piston Stroke Control for Linear Oscillatory Machine Based on High-Order Generalized Integrator

作　　者：廖光钰 廖凯举 徐伟[2,3] 葛健 张茂鑫 Liao Guangyu;Liao Kaiju;Xu Wei;Ge Jian;Zhang Maoxin(State Key Laboratory of Advanced Electromagnetic Technology Huazhong University of Science and Technology,Wuhan 430074 China;Key Laboratory of High Density Electromagnetic Power and Systems(Chinese Academy of Sciences)Institute of Electrical Engineering Chinese Academy of Sciences,Beijing 100190 China;School of Electronic,Electrical and Communication Engineering University of Chinese Academy of Sciences,Beijing 100049 China)

机构地区：[1]强电磁技术全国重点实验室(华中科技大学),武汉430074 [2]高密度电磁动力与系统重点实验室(中国科学院)中国科学院电工研究所,北京100190 [3]中国科学院大学电子电气与通讯工程学院,北京100049

出　　处：《电工技术学报》2025年第8期2477-2487,共11页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金面上项目(52277050);深圳市协同创新计划国际科技合作项目(GJHZ20210705142539007)资助。

摘　　要：针对现有直线振荡电机(LOM)无位置传感器控制受直流分量影响严重,导致行程观测精度低、系统可靠性不高等问题,该文设计了一种基于高阶广义积分器(HOGI)的改进型无位置传感器活塞行程观测方法。首先,对比分析了纯积分器、低通滤波器及二阶广义积分器(SOGI)对直流分量的抑制效果,总结出不同滤波方法的局限性。其次,针对现有滤波方法无法完全消除直流分量,行程观测精度难以提升的问题,设计高性能HOGI代替传统纯积分器,利用HOGI的多重滤波特性完全消除直流分量的干扰,以提升观测器性能。此外,基于前向欧拉法设计了HOGI的离散化实现方法,具有计算简便、易实现等优点。最后,将传统SOGI与HOGI进行实验对比分析,验证了所提方法的有效性与优越性。Implementing sensorless control is necessary to reduce the system volume of linear oscillatory machines(LOM)used in linear compressors and achieve efficient and reliable operation.The existing piston stroke observers have low observation accuracy and are susceptible to DC components,resulting in a decrease in system compression performance or cylinder collision risk.Therefore,this paper designs an improved high-precision piston stroke observer for linear oscillation machines based on a high-order generalized integrator(HOGI).Firstly,a theoretical analysis is conducted on traditional back electromotive force integration,low-pass filter(LPF),and second-order generalized integrator(SOGI),elucidating the existence of integral saturation problems in back electromotive force integration,amplitude attenuation,and phase shift problems in LPF.SOGI performs slightly better than the previous two but still cannot eliminate the DC component.When operating at low resonant frequencies or in systems with large DC components,SOGI is no longer applicable.Secondly,in response to the shortcomings of traditional integrators,this paper adopts HOGI as a piston stroke observer.This method can eliminate the DC component,and no DC bias exists in the observed stroke signal.The paper also uses the forward Euler method to derive the digital implementation method of HOGI.Finally,experiments are conducted to compare SOGI and HOGI.The experimental results show that the piston stroke observed by HOGI is more accurate than SOGI without additional DC bias.Furthermore,when an additional 0.2 A DC bias is added,the piston stroke average offset observed by SOGI at the given value of 5 mm,6 mm,and 8 mm is 1.3675 mm,1.365 mm,and 1.3515 mm,respectively.The piston stroke observed by HOGI is unaffected by DC bias.Therefore,the piston stroke observer with HOGI is suitable for occasions with serious DC disturbance.The contributions of this paper are as follows.(1)Based on traditional SOGI,an improved HOGI piston stroke observation structure is designed.Multi

关 键 词：直线振荡电机 无位置传感器控制 高阶广义积分器 直流分量抑制 前向欧拉法 

分 类 号：TM32[电气工程—电机]