Study of the electric arc in DC contactors: Modeling, simulation and experimental validation

2017 IEEE Holm Conference on Electrical Contacts Pub Date : 2017-09-01 DOI:10.1109/HOLM.2017.8088057

M. Buffo, J. Martin, S. Saadate, J. Andrea, N. Dumoulin, E. Guillard

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引用次数: 7

Abstract

This paper presents a method to simulate the current and voltage of an electric arc initiated at the contact's opening in a contactor. Based on a simplified model of the electric arc and also on the dynamics of the contacts during the opening, this method allows to simulate the arc ignition as well as the arc extinction. This study is based on the hypothesis that the arc dynamic is much faster than the opening speed. This hypothesis allows us to use a static arc equation. The arc is described as a nonlinear resistance, which is dependant of the gap between the contacts. The parameters of the gap's equation are approximated by an analysis of the video obtained with a high speed camera during the opening of the contactor. The parameters of this arc's model are approximated by experimental tests on a DC contactor with AgSnO2 contacts. A fitting method is developed to minimize the error introduced due to the non-linearity when the static arc parameters are fitted to the static arc equation. Simulation results are compared with experimental data to demonstrate the validity of the suggested method.

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直流接触器电弧的研究:建模、仿真与实验验证

本文提出了一种模拟接触器触点开口处电弧的电流和电压的方法。该方法基于电弧的简化模型和触点在打开过程中的动力学，可以模拟电弧的点燃和熄灭。本研究是基于电弧动态速度远快于开启速度的假设。这个假设允许我们使用静弧方程。电弧被描述为非线性电阻，它与触点之间的间隙有关。对接触器开启过程中高速摄像机拍摄的视频进行了分析，得到了间隙方程的参数。该电弧模型的参数通过带AgSnO2触点的直流接触器的实验测试得到近似解。提出了一种拟合方法，使静弧参数拟合到静弧方程时由于非线性引起的误差最小。仿真结果与实验数据进行了比较，验证了所提方法的有效性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2017 IEEE Holm Conference on Electrical Contacts

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