本文選題：高壓直流大功率繼電器 + 電壽命��； 參考：《哈爾濱工業(yè)大學(xué)》2016年碩士論文

【摘要】：高壓大功率已成為目前電磁繼電器發(fā)展的主要趨勢,但伴隨電壓和功率提升而帶來的可靠性與壽命的降低成為了制約其得到廣泛應(yīng)用的阻礙。因此,研究高壓大功率電磁繼電器壽命退化過程并建立其電壽命模型,對提高其可靠性與壽命具有重要意義。本文依托所搭建的高壓直流大功率繼電器實驗系統(tǒng),通過研究電壽命特征量在壽命退化過程中的變化規(guī)律,以及不同設(shè)計參數(shù)對特征量變化規(guī)律的影響方式,建立了高壓直流大功率繼電器電壽命數(shù)學(xué)模型,為產(chǎn)品設(shè)計提供了可靠參考,同時為產(chǎn)品可靠性優(yōu)化與壽命提升提供了理論依據(jù)。首先,設(shè)計并搭建了一種高壓直流大功率繼電器實驗系統(tǒng)。該系統(tǒng)可對實際產(chǎn)品進行壽命實驗并采集保存每次閉合與分?jǐn)噙^程中觸頭的電壓與電流;也可以通過高速模擬分?jǐn)鄼C構(gòu)進行磁吹強度、觸頭開距和分?jǐn)嗨俣鹊仍O(shè)計參數(shù)可調(diào)的實驗,并在實驗過程中測量和保存觸頭的電壓和電流、動觸頭位移、動觸頭和靜觸頭相互作用力等信號;此外,該系統(tǒng)還包含了基于PLC的保護模塊以保證高壓實驗的安全進行。其次,通過實際產(chǎn)品的壽命試驗確定了270V/200A高壓直流大功率接觸器的主要失效模式和失效機理,并以此確定了可表征壽命退化過程的特征量;利用高速模擬分?jǐn)嘌b置在不同的設(shè)計參數(shù)下進行實驗,探究對特征量影響最為顯著的關(guān)鍵設(shè)計參數(shù),并采用回歸分析的方式,揭示其影響特征量的具體方式,針對各關(guān)鍵影響因素分別建立了基于不同特征量的單因素電壽命模型。最后,使用L9(34)正交表并根據(jù)已確定的電壽命特征量及其關(guān)鍵影響因素設(shè)計了正交實驗。在已知不同特征量的單因素電壽命模型的前提下,采用多元線性回歸對正交實驗的結(jié)果進行分析,將不同的影響因素進行耦合,建立了不同特征量的多影響因素模型。對得到的模型進行F檢驗,證明其顯著性與準(zhǔn)確性。最終結(jié)合不同特征量的多影響因素電壽命模型,建立了完整的高壓直流大功率繼電器電壽命數(shù)學(xué)模型。本文的研究成果可應(yīng)用于高壓直流大功率繼電器的設(shè)計,為其設(shè)計參數(shù)的選擇提供可靠且準(zhǔn)確的依據(jù);同時也可以應(yīng)用于智能電器的開發(fā),為其進行自我壽命診斷提供算法模型。
[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.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號】：TM58

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