A new measurement technique for the investigation of arcing processes of sliding contacts

Electrical Contacts - 1991 Proceedings of the Thirty-Seventh IEEE HOLM Conference on Electrical Contacts Pub Date : 1900-01-01 DOI:10.1109/HOLM.1991.170817

H. Haessler, M. Linde

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引用次数: 2

Abstract

The current leakage between the brushes and commutators of electrical motors generates arcs causing high-frequency pulses in the commutating current. Pulse amplitude and intensity depends on the material pairs, wear-in conditions, and mechanical tolerances of the brush-commutator system. To investigate the brush sparking of electric motors the high-frequency part of the motor current between 1 MKz and 50 MHz was considered. By use of a spectrum analyzer and advanced evaluation methods the quality of commutation can be determined. The high-frequency part of the motor current is an equivalent criterion of the intensity and arc rate of the brush sparking for quality assessment. The applicability of this method was tested using 25 AC motors rated at 230 V and 1.2 kW. In a first coarse evaluation of the measurement, good correlation between the new electronic and the conventional subjective-optical method was found. The information volume contained in the electrical spectrum, however, is considerably greater than that obtainable by the optical method.<>

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一种研究滑动触点弧化过程的新测量技术

电动机电刷与换向器之间的漏电流产生电弧，使换向电流产生高频脉冲。脉冲振幅和强度取决于电刷换向器系统的材料对、磨损条件和机械公差。为研究电机电刷火花现象，考虑了电机电流在1 ~ 50 MHz范围内的高频部分。利用频谱分析仪和先进的评价方法，可以确定换相质量。电机电流的高频部分是电刷火花强度和电弧率的等效标准，用于质量评价。使用25台额定电压为230v，功率为1.2 kW的交流电机对该方法的适用性进行了测试。在对测量的第一次粗略评估中，发现新的电子方法与传统的主观光学方法之间具有良好的相关性。然而，电光谱中包含的信息量比光学方法获得的信息量要大得多。

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Electrical Contacts - 1991 Proceedings of the Thirty-Seventh IEEE HOLM Conference on Electrical Contacts

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