Discrete-Time Luenberger Observer for Interior Permanent Magnet Synchronous Motor with Low-Frequency-Ratio

被引：0
作者：
Yuan G. [1 ]
Niu Z. [1 ]
Zheng C. [1 ,2 ]
Li Z. [1 ]
机构：
[1] Power Electronics and Motor Drives Engineering Research Center of Beijing, North China University of Technology, Beijing
[2] School of Automation and Electrical Engineering, University of Science & Technology Beijing, Beijing
来源：
Diangong Jishu Xuebao/Transactions of China Electrotechnical Society | 2019年 / 34卷 / 02期
关键词：
Interior permanent magnet synchronous motor (IPMSM); Low ratios of fundamental-to-switch frequency; Luenberger observer; Pole assignment; Sensorless control;
D O I：
10.19595/j.cnki.1000-6753.tces.171527
中图分类号：
学科分类号：
摘要：
This paper proposes a design method of discrete-time Luenberger observer in the stationary coordinate system for position sensorless control of interior permanent magnet synchronous motor (IPMSM) drives. This method achieves a low pulse width modulation (PWM) to operating fundamental frequency ratio. Based on extended back-EMF in the stationary coordinate system, a discrete-time complex vector IPMSM model is established to describe the exact mathematical relationship between the applied voltage and the measured current. Consequently, combined with the dynamic characteristics of the back-EMF, a full-order Luenberger observer is constructed. Aiming to the problem that the observer contains pole point in the imaginary axis, a linear trajectory method in discrete domain is used for the design of feedback gain matrix. This method can guarantee the stability of the observer and allow fast convergence. The proposed discrete-time Luenberger observer was verified on the 14kW IPMSM drive platform, and the experimental results demonstrated the feasibility and effectiveness of this observer in low-frequency-ratio. © 2019, Electrical Technology Press Co. Ltd. All right reserved.
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页码：236 / 244
页数：8
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