高压直流大功率继电器电寿命模型的研究

发布时间：2018-04-29 07:12

本文选题：高压直流大功率继电器 + 电寿命　；参考：《哈尔滨工业大学》2016年硕士论文

【摘要】：高压大功率已成为目前电磁继电器发展的主要趋势,但伴随电压和功率提升而带来的可靠性与寿命的降低成为了制约其得到广泛应用的阻碍。因此,研究高压大功率电磁继电器寿命退化过程并建立其电寿命模型,对提高其可靠性与寿命具有重要意义。本文依托所搭建的高压直流大功率继电器实验系统,通过研究电寿命特征量在寿命退化过程中的变化规律,以及不同设计参数对特征量变化规律的影响方式,建立了高压直流大功率继电器电寿命数学模型,为产品设计提供了可靠参考,同时为产品可靠性优化与寿命提升提供了理论依据。首先,设计并搭建了一种高压直流大功率继电器实验系统。该系统可对实际产品进行寿命实验并采集保存每次闭合与分断过程中触头的电压与电流;也可以通过高速模拟分断机构进行磁吹强度、触头开距和分断速度等设计参数可调的实验,并在实验过程中测量和保存触头的电压和电流、动触头位移、动触头和静触头相互作用力等信号;此外,该系统还包含了基于PLC的保护模块以保证高压实验的安全进行。其次,通过实际产品的寿命试验确定了270V/200A高压直流大功率接触器的主要失效模式和失效机理,并以此确定了可表征寿命退化过程的特征量;利用高速模拟分断装置在不同的设计参数下进行实验,探究对特征量影响最为显著的关键设计参数,并采用回归分析的方式,揭示其影响特征量的具体方式,针对各关键影响因素分别建立了基于不同特征量的单因素电寿命模型。最后,使用L9(34)正交表并根据已确定的电寿命特征量及其关键影响因素设计了正交实验。在已知不同特征量的单因素电寿命模型的前提下,采用多元线性回归对正交实验的结果进行分析,将不同的影响因素进行耦合,建立了不同特征量的多影响因素模型。对得到的模型进行F检验,证明其显著性与准确性。最终结合不同特征量的多影响因素电寿命模型,建立了完整的高压直流大功率继电器电寿命数学模型。本文的研究成果可应用于高压直流大功率继电器的设计,为其设计参数的选择提供可靠且准确的依据;同时也可以应用于智能电器的开发,为其进行自我寿命诊断提供算法模型。
[Abstract]:High voltage and high power have become the main trend in the development of electromagnetic relays, but the decrease of reliability and life associated with the increase of voltage and power has become a hindrance to its wide application. Therefore, it is of great significance to study the life degradation process of high-voltage and high-power electromagnetic relay and to establish its electric life model to improve its reliability and life. Based on the experimental system of high-voltage DC high-power relay, this paper studies the variation law of electric life characteristic quantity in the process of life degradation, and the influence of different design parameters on characteristic quantity change rule. The mathematical model of electrical life of high-voltage DC high-power relay is established, which provides a reliable reference for product design, and provides a theoretical basis for product reliability optimization and life promotion. Firstly, a high-voltage DC high-power relay experiment system is designed and built. The system can test the life of the actual product and collect and save the voltage and current of the contact during each closing and breaking process, and can also simulate the magnetic blowing intensity of the breaking mechanism at high speed. Experiments with adjustable design parameters such as contact opening distance and breaking speed, and measurement and preservation of the voltage and current of the contact, displacement of the contact, interaction between the contact and the static contact in the process of the experiment; in addition, The system also includes PLC-based protection module to ensure the safety of high-voltage experiments. Secondly, the main failure mode and failure mechanism of 270V/200A high voltage DC high power contactor are determined by the life test of actual products, and the characteristic quantity of life degradation process can be determined. By using the high speed analog breaking device to experiment under different design parameters, the key design parameters which have the most significant influence on the characteristic quantity are explored, and the specific way of influencing the characteristic quantity is revealed by means of regression analysis. A single factor electric life model based on different characteristic variables is established for each key factor. Finally, the orthogonal experiment is designed by using L9 / 34) orthogonal table and according to the determined characteristic quantity of electric life and its key influencing factors. On the premise of knowing the single factor electric life model with different characteristic quantities, the results of orthogonal experiment are analyzed by multivariate linear regression, and the different influencing factors are coupled, and the multi-factor model of different characteristic quantities is established. The F test of the obtained model proves its significance and accuracy. Finally, a complete mathematical model of the electrical life of high-voltage DC high-power relay is established based on the multi-factor electrical life model with different characteristic quantities. The research results of this paper can be applied to the design of high-voltage DC high-power relay, which can provide a reliable and accurate basis for the selection of design parameters, and can also be applied to the development of intelligent electrical apparatus. An algorithm model is provided for self-life diagnosis.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TM58

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