一种低载波比下内埋式永磁同步电机离散龙贝格观测器

doi:10.19595/j.cnki.1000-6753.tces.171527

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Abstract

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.

Key words： Interior permanent magnet synchronous motor (IPMSM) sensorless control low ratios of fundamental-to-switch frequency Luenberger observer pole assignment

Received: 16 November 2017 Published: 29 January 2019

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TM351

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	Articles by authors
	Yuan Guofeng
	Niu Zenong
	Zheng Chunyu
	Li Zhengxi

Cite this article:

Yuan Guofeng,Niu Zenong,Zheng Chunyu等. Discrete-Time Luenberger Observer for Interior Permanent Magnet Synchronous Motor with Low-Frequency-Ratio[J]. Transactions of China Electrotechnical Society, 2019, 34(2): 236-244.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.171527 OR https://dgjsxb.ces-transaction.com/EN/Y2019/V34/I2/236

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