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The numerical evaluation study for the relationship between contact-sticking and transferred pip on electrical contacts mounted on relays in DC 42V automobile circuit

直流42V汽车电路继电器电接点粘连与移管关系数值评价研究

基本信息

批准号：
15360148
负责人：
KUBONO Takayoshi
金额：
$ 8.58万
依托单位：
Shizuoka University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2003
资助国家：
日本
起止时间：
2003 至 2006
项目状态：
已结题

项目摘要

The growing process of the transferred pips at the make-only contacts or the break-only contacts mounted individually on two relays has been photographed every 100 switching operations from two directions by two digital microscopes. The shape of transferred pips piled up at the surfaces of contacts on the tips of two cantilever supporting arms arranged parallel is not conical, and becomes the sphinx image type with the magnification of the height of transferred pip. This formation process of pip which resembles the sphinx image is considered that the evaporated atoms and scattered particles in the arc column are piled up at the top side of the parallel supporting arms, because the arc column of each arc discharge is extruded by the Ampere force for the arc current carried through these arms. Moreover, we think that when the pip greatly grew, the contact surfaces at make-only operation are melted partially and these surfaces were welded at the static contact period, because the appearan … More ce of the arc discharge and the molten bridge just before making contacts and in the rebound period are confirmed from the voltage waveform.With respect to measurement of shapes of transferred pips and eroded craters, a scanning laser microscope was used to per-form 3-D image observation as well as numerical evaluation (measurements of depth, height, diameter, and volume calculation) of the transferred pips and eroded craters formed on the electrodes. Especially, for the volume measurement, new algorithms called "Trapezoidal Approximation Algorithm" and "Divided Trapezoidal Approximation Algorithm", respectively, were developed. Moreover, in order to make comparisons of shapes of pips and eroded craters formed for different contact materials and/or under different load conditions, drawing a graph by employing the pip height or crater depth values as the vertical axis and their diameters as the horizontal axis has been confirmed to be useful.Using the low-speed and constant-speed separating equipment, the figures of breaking arc were photographed in the lms interval. it is found that the fluctuating range of the location in arc bright spots was big in the initial stage of breaking arc discharge and in the big fluctuating part of arc voltage waveform, and on the other hand that the fluctuating range of the location of arc bright spots was narrow in the later stage of breaking arc discharge.In Home page http://www.ipc.shizuoka.ac.jp/~tjsekik/, the following were reported "Moving pictures of growing process of the transferred pips and the motion situation of cathode spot and anode spot of breaking arc discharge". Less

两台数字显微镜每隔100次从两个方向切换一次，就会拍摄到两个继电器上单独安装的只通触点或只断开触点上的传输点滴的生长过程。在平行排列的两个悬臂支撑臂顶端的接触面上堆积的转移管形状不是圆锥形的，随着转移管高度的放大而成为狮身人面像。这种类似于狮身人面像的PIP的形成过程被认为是电弧柱中蒸发的原子和散射粒子堆积在平行支撑臂的顶侧，因为每个电弧放电的电弧柱都被安培力挤出，电流通过这些支撑臂。此外，我们认为，当管子大幅增长时，仅制造操作时的接触表面被部分熔化，这些表面在静态接触期间被焊接，因为出现了…利用扫描激光显微镜对电极上形成的过渡点滴和腐蚀凹坑进行了三维图像观察和数值计算(深度、高度、直径和体积的测量)。特别是，对于体积测量，提出了分别称为“梯形近似算法”和“分割梯形近似算法”的新算法。此外，为了比较不同触头材料和/或不同载荷条件下形成的点蚀坑和冲蚀坑的形状，以点蚀高度或冲蚀坑深度值为垂直轴、直径为水平轴绘制图形是可行的，并利用低速和恒速分离设备拍摄了在LMS间隔内的断弧图形。研究发现，在开弧初期和开弧电压波形波动较大的区域，弧亮点位置的波动幅度较大，而在开弧放电的后期，弧亮点位置的波动范围较小。在主页http://www.ipc.shizuoka.ac.jp/~tjsekik/，中，报道了以下内容：“转移的点子生长过程的动态图片，以及开弧放电的阴阳极点的运动情况”。较少