电磁继电器特性参数的测试及其退化规律的研究

发布时间：2018-02-05 18:58

本文关键词： 电磁继电器参数测试退化规律数据处理寿命预测　出处：《河北工业大学》2015年硕士论文　论文类型：学位论文

【摘要】：电磁继电器作为一种典型的低压电器元件,广泛应用于自动控制、电力系统保护、航空航天等领域,其能否可靠工作影响着整个设备或系统的稳定性。随服役时间增长,电磁继电器的性能会发生退化,其特性参数的退化数据中包含大量与可靠性、寿命相关的信息。因此,研究电磁继电器特性参数测试方法,可靠性评估、寿命预测及退化规律具有重要的理论意义和实用价值。本文在分析电磁继电器工作原理、失效原因、动态特性曲线的基础上,确定能够表征电磁继电器退化过程的关键特性参数。设计并搭建了电磁继电器特性参数测试装置的硬件系统,编写数据采集、特性参数计算、存储的软件程序。利用测试系统实时采集电磁继电器动作过程中触点电压、线圈电流波形数据,对其特性参数(吸合时间、超程时间、接触电阻、时间常数)进行计算、显示和连续存储。对试验获得的关键特性参数的退化数据进行处理,并且结合理论研究与数据趋势,分析退化失效过程中特性参数的退化规律。为了更全面研究电磁继电器的性能退化过程与退化数据特征,分别建立基于随机Wiener过程、随机Gamma过程、Weibull分布的可靠性模型与寿命预测模型,然后基于电磁继电器的特性参数退化数据,对模型参数进行估计。最后用上述模型对继电器进行剩余寿命预测。本文为了提高寿命预测精度,在单项模型的基础上建立了组合预测模型,实例应用表明该方法有效可行。
[Abstract]:As a typical low-voltage electrical device, electromagnetic relay is widely used in the fields of automatic control, power system protection, aerospace and so on. Its reliability affects the stability of the whole equipment or system. With the increase of service time, the performance of electromagnetic relay will degenerate, and the degradation data of its characteristic parameters contain a large amount of reliability. Therefore, the study of electromagnetic relay characteristic parameters testing method, reliability evaluation. Life prediction and degradation law have important theoretical significance and practical value. This paper analyzes the working principle, failure reason and dynamic characteristic curve of electromagnetic relay. The key characteristic parameters which can characterize the degradation process of electromagnetic relay are determined. The hardware system of electromagnetic relay characteristic parameter testing device is designed and built. Data collection and characteristic parameter calculation are compiled. Using the test system to collect the data of contact voltage and coil current waveform in the course of electromagnetic relay operation, and to analyze its characteristic parameters (suction time, overrun time, contact resistance). The time constant) is calculated, displayed and stored continuously. The degradation data of the key characteristic parameters obtained from the experiment are processed, and combined with the theoretical research and the data trend. In order to study the degradation process and data characteristics of electromagnetic relay, a stochastic Wiener process is established. The reliability model and life prediction model of the random Gamma process are presented, and then the degradation data of the characteristic parameters of the electromagnetic relay are used. The model parameters are estimated. Finally, the residual life of relay is predicted by the above model. In order to improve the accuracy of life prediction, the combined prediction model is established on the basis of single model. An example shows that this method is effective and feasible.
【学位授予单位】：河北工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TM581.3

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