A novel nonsingular fast terminal sliding mode observer combining I-F method for wide-speed sensorless control of PMSM drives

被引:8
|
作者
Liu, Ling [1 ,2 ]
Jin, Dongsong [1 ,2 ]
Si, Jiewen [2 ]
Liang, Deliang [1 ,2 ]
机构
[1] Xi An Jiao Tong Univ, State Key Lab Elect Insulat & Power Equipment, Xian, Peoples R China
[2] Xi An Jiao Tong Univ, Sch Elect Engn, Xian, Peoples R China
基金
中国国家自然科学基金;
关键词
D O I
10.1049/pel2.12427
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
Based on the consideration of optimizing speed piecewise and transitioning smoothly, a hybrid position sensorless control strategy integrating with a novel nonsingular fast terminal sliding mode observer (NFTSMO) and the current-frequency (I-F) control method for surface-mounted permanent magnet synchronous motor (PMSM) is proposed in this paper. In zero-low speed regions, the I-F control method is employed for starting steadily and possessing the ability of anti-interference. In middle-high speed regions, an improved sliding mode observer (SMO) based on a novel nonsingular fast terminal sliding surface is designed for the closed-loop sensorless operation. Making use of the novel sliding surface, not only the estimated errors of rotor position caused by the conventional sliding surface can be eliminated effectively with a faster rate of convergence to improve the stability of system, but also the chattering of the estimated back EMF can be restrained by the sigmoid function. Meanwhile, the phase-locked loop is utilized to lessen the burden of calculation and phase delay. Furthermore, a transition function is designed so as to fulfill the smooth transition between two different control ideologies. The effectiveness of the proposed hybrid sensorless control strategy for both dynamic and steady state operations during wide-speed region is verified by simulation and experimental analyses.
引用
收藏
页码:843 / 855
页数:13
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