继电器
扫描电子显微镜
振动
傅里叶变换红外光谱
材料科学
电接点
图层(电子)
电气工程
复合材料
工程类
声学
化学工程
物理
量子力学
功率(物理)
作者
Ping Sun,Junying Zhang,Anji Dong,Lei Zhang,Wenjun Wang,Nan Wu,Abo Dou
出处
期刊:Journal of physics
[IOP Publishing]
日期:2022-11-01
卷期号:2364 (1): 012026-012026
标识
DOI:10.1088/1742-6596/2364/1/012026
摘要
Abstract Electromagnetic relay is an essential part in electric control system on EMU. Because of frequent operation of on-off, external vibration, temperature rising and corrosive gas, etc when the EMU is in operation may cause wear and oxidation of the surface of contact points. Therefore, the electrical contact resistance increased, which cause contact electrical performance failure. The scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR) was used to observe and measure the surface and section of contact points. The experimental result shows that the surface layer wear and contained phosphate and the section contained O, F, S, P, Ag, Ni elements. Thereafter the mechanism of efficacy losing of electromagnetic relay was discussed.
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