Induction motor flux and speed observers with a dead-time compensation strategy

被引：0
|
作者：
Liu H.-P. [1 ]
Miao Y.-R. [1 ]
Liu J. [2 ]
Huang Y.-S. [1 ]
Huang P. [1 ]
Guo Q. [3 ]
机构：
[1] State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing
[2] State Grid Jiangsu Electric Power Maintenance Branch Company, Nanjing
[3] Chongqing Engineering Research Center of Energy Internet, Chongqing University of Technology, Chongqing
来源：
Dianji yu Kongzhi Xuebao/Electric Machines and Control | 2019年 / 23卷 / 02期
关键词：
Dead-time compensation; Flux observer; Induction machine; Second order high-pass filter; Speed observer; Total harmonic distortion;
D O I：
10.15938/j.emc.2019.02.001
中图分类号：
学科分类号：
摘要：
The accuracy of rotor flux observation of induction motor influences the performance of motor controlling directly. There are some problems in the traditional voltage observation model and current observation model, such as amplitude error, phase lag of flux in low speed. This paper used voltage-current mixed model to build closed-loop flux observer, and set the flux angel of the mixed model as feedback to implement the rotor flux orientation, so as to avoid checking rotor speed. It applied model reference adaptive system (MRAS) to set the rotor flux which was based on the mixed model as reference model, and set the current model as adjustable model. So the accurate rotor speed was obtained after PI adjustment. In order to eliminate dead-time effect, this paper presented a symmetrical dead-time compensation method. Through the independent drive signal, the offset of output voltage was removed. Furthermore, it designed a second order high-pass filter which filtered high-frequency component effectively and increased the accuracy of current polarity judgment. Both simulation and experiment results prove the desired performance of the proposed method. © 2019, Harbin University of Science and Technology Publication. All right reserved.
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页码：1 / 10
页数：9
相关论文
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