摘要
为了提高磁通切换永磁直线(LFSPM)电机无位置传感器控制性能,同时针对该电机双凸极结构引起的定位力较大的缺陷,提出一种带有定位力补偿的扩张观测器无位置传感器控制策略。首先,建立合成反电动势模型,研究通过将反电动势估算值反馈引入到定子电流观测计算中的动子位置估算方法,同时为提高观测精度,将两相静止坐标下电流状态方程的反电动势作为系统干扰,通过扩张状态观测器进行准确估计,并采用归一化的正交锁相环来获得动子位置信息,在此基础上,给出自适应滑模速度控制器的设计方法,利用电流谐波注入法对观测的定位力进行前馈补偿,以便消除因定位力时变引起的动子速度和位置估算稳态误差,提高滑模控制抗扰性能。仿真结果表明,系统扰动观测值在能够快速准确地跟踪实际值的同时进一步抑制位置估算误差,基于A&D5435半实物装置搭建硬件电路,实验结果进一步验证了所提方法的有效性,实现了LFSPM电机在不同工况运行条件下的无位置准确跟踪。
For the defects existing in cogging force caused by double salient structure of linear fluxswitching permanent magnet(LFSPM)machine,a strategy about extended state observer(ESO)with control of a position-independent sensor and cogging force compensation was proposed to improve the control performance of the sensorless in LFSPM.Primarily,a back electromotive force(EMF)model was built,and a method introducing back EMF estimation value into stator current observer was studied.And then the back EMF in the current state function under the two-phase stationary reference frame,considered as disturbance of the system,performed exact estimation by using an ESO to increase the precision of observation.On this basis,the adaptive sliding-mode controller was designed,in which harmonic current was used for feed-forward compensation of the observed cogging force to eliminate the estimation errors in mover position and speed induced by time variation of cogging force and improve the performance of sliding-mode controller.Simulation results showed that the measured values of the system disturbance can quickly and accurately follow the real values,and meanwhile further suppress the position estimation error.Experimental evaluations of the proposed scheme were carried out on an A&D5435-controlled LFSPM drive platform to verify and confirm the practical efficiency of the proposed approach.The exact position tracking of LFSPM motor under different working conditions was realized.
作者
孟高军
袁野
孙玉坤
朱志莹
刘海涛
Meng Gaojun;Yuan Ye;Sun Yukun;Zhu Zhiying;Liu Haitao(Jiangsu Collaborative Innovation Center for Smart Distribution Network Nanjing 210000,China;School of Electrical and Information Engineering Jiangsu University Zhenjiang 212013,China)
出处
《电工技术学报》
EI
CSCD
北大核心
2018年第17期4091-4101,共11页
Transactions of China Electrotechnical Society
基金
国家自然科学基金(51707082
51507077)
中国博士后科学基金(2017M620192)
江苏省六大人才高峰(GDZB-026)
江苏省配电网智能技术与装备协同创新中心人才启动基金(YKJ201713)
江苏省配电网智能技术与装备协同创新中心开放基金(XTCX201702)
江苏高校优势学科建设工程项目(2014)资助
关键词
磁通切换永磁直线电机
定位力
扩张状态观测器
前馈补偿
无位置传感器
Linear flux-switching permanent magnet machine,cogging force,extended state observer,feed-forward compensation,sensorless control
