Analysis of the Contact Overtravel of Contactor and Its Degradation State Evaluation
Fu Rao1, Liang Huimin1, Ye Xuerong1, You Jiaxin1, Wei Zhen2
1. School of Electrical Engineering and Automation Harbin Institute of Technology Harbin 150001 China; 2. Guilin Aerospace Electronics Co. Ltd Guilin 541000 China
Abstract：Contact overtravel is an important characteristic parameter that characterizes the life of a contactor. At present, it is impossible to measure the contact overtravel directly when the contactor is working. A lot of scholars have predicted the life of electrical apparatus on overtravel time. The life prediction of the contactor is mainly based on the overtravel time. However, such methods have many problems, such as long test period, poor generalization and large data noise. Firstly, on the basis of life test data, the relationship between contact overtravel and life is analyzed to determine the degradation mechanism and degradation range of contact overtravel. Secondly, based on virtual prototype simulation, contact overtravel degradation characteristics are analyzed and degradation feature are extracted. Based on the degradation data of contact overtravel in actual product life test, support vector machine is proposed to classify the degradation. Finally, the feasibility of the diagnosis method is verified by an example. The diagnosis results show that the method has high accuracy and can greatly shorten the time required for life prediction of contactors.
付饶, 梁慧敏, 叶雪荣, 由佳欣, 韦震. 接触器触点超程分析及其退化状态的诊断[J]. 电工技术学报, 2020, 35(1): 125-133.
Fu Rao, Liang Huimin, Ye Xuerong, You Jiaxin, Wei Zhen. Analysis of the Contact Overtravel of Contactor and Its Degradation State Evaluation. Transactions of China Electrotechnical Society, 2020, 35(1): 125-133.
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2020, Vol. 35 
