直流自然换流式接触器设计与均压开断研究

doi:10.19595/j.cnki.1000-6753.tces.L90181

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Abstract Based on a DC natural current commutation topology, this paper uses the current-loading branch contacts carrying rated current and multiple sets of series arcing branch contacts in parallel to achieve circuit breaking, which can meet the DC switching demand of higher voltage levels in aviation, aerospace and new energy fields. After theoretical analysis and corresponding experiments, the current commutation characteristics and arcing characteristics of different branches of the topology are studied, and the phenomenon of uneven voltage distribution among the multi-fractures in series of arcing branches during circuit breaking is obtained. Two adjustment methods, structural adjustment and magnetic field adjustment are proposed, and the dynamic Mayr correction model is used to study the equalizing breaking effect of arcing contacts under different adjustment methods. A method to measure the voltage uniformity coefficient of arcs in series with multiple breaks during dynamic breaking process is defined, and a structure control method that optimizes the action characteristics of the arcing contact is obtained. The voltage uniformity coefficient is increased from 54.1% to 80.1%. Aiming at the dispersion of the arcing contact action, the magnetic field control method is further adopted to increase the voltage uniformity coefficient to 98.05%, and the uniform voltage distribution improves the breaking capacity and electrical life of multiple serial connection structures.

Key words： DC breaking arc appearance voltage uniformity coefficient uniform-voltage adjustment method DC breaking arc appearance voltage uniformity coefficient uniform-voltage adjustment method

Received: 30 June 2020

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TM561

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	Jia Bowen
	Jia Bowen
	Wu Jianwen
	Xia Shangwen
	Luo Xiaowu
	Wu Jianwen
	Xia Shangwen
	Yue Yunxia
	Luo Xiaowu
	Yue Yunxia

Cite this article:

Jia Bowen,Jia Bowen,Wu Jianwen等. Design and Uniform Voltage Breaking Research of a DC Natural Current Commutation Contactor[J]. Transactions of China Electrotechnical Society, 2021, 36(20): 4371-4378.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.L90181 OR https://dgjsxb.ces-transaction.com/EN/Y2021/V36/I20/4371

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