离散型变增益永磁同步电机超螺旋滑模观测器

doi:10.19595/j.cnki.1000-6753.tces.171407

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Abstract Since traditional sliding mode observer has inherent chattering problem, a discrete variable gain super-twisting sliding mode observer for permanent magnet synchronous motor is proposed. Firstly, the variable gain of the observer is dynamically adjusted with the motor speed and the internal state of system, so that the sliding mode chattering suppression in a wide range of variable speed conditions is achieved. Secondly, a first-order low-pass filter is designed to improve the robustness in the transient process of the sliding mode control system, and the convergence of sliding mode trajectory in finite time is proved based on reduction to absurdity. Finally, a new vector control strategy is proposed to fully decouple the d、q axis of current loop. Based on hybrid orientation, the effective back EMF component of α、β axis is extracted from the observer output, and combine with the back EMF transformation matrix, feedforward compensation in the current loop is realized. Experimental results verify the effectiveness and practicability of the control strategy proposed in this paper.

Key words： Permanent magnet synchronous motor super-twisting sliding mode observer discrete variable gain chattering suppression vector control

Received: 20 October 2017 Published: 12 November 2018

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TM301

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	Zhang Yi
	Wu Jiaxin
	Wei Hanpei
	Zhang Youquan
	Peng Yan

Cite this article:

Zhang Yi,Wu Jiaxin,Wei Hanpei等. Discrete Variable Gain Super-Twisting Sliding Mode Observer for Permanent Magnet Synchronous Motor[J]. Transactions of China Electrotechnical Society, 2018, 33(21): 4962-4970.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.171407 OR https://dgjsxb.ces-transaction.com/EN/Y2018/V33/I21/4962

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