【作者】 常诚；

【导师】 郭凤仪； 刘艳丽；

【作者基本信息】 辽宁工程技术大学 ， 电气工程， 2019， 硕士

【摘要】 交流磁保持继电器是一种新型继电器,具有体积小,PCB式安装功耗低,负载能力强、安全可靠,寿命长等优点。但交流磁保持继电器在分合闸的过程中,触点之间会有电弧产生。由于电弧的作用会使得触点发生电化学腐蚀从而严重影响继电器的稳定性。为增加交流磁保持继电器的稳定性与电寿命,本文就交流磁保持继电器的电弧特性展开研究。首先模拟交流磁保持继电器的机械结构,设计了磁保持继电器的模拟实验装置。利用实验装置分别在不同电源电压、不同回路电流、不同触头间隙、不同触头分断速度下进行了磁保持继电器的触头分断模拟实验,并对利用高速摄像机与上位机采集到的数据进行处理,得到不同实验条件下的燃弧能量、燃弧时间与电弧长度。通过对实验结果进行交流电弧特性分析,得出如下结论:增大回路电流、电源电压会使燃弧能量、燃弧时间和电弧长度增加,且燃弧初始相位角与这三个电弧特性有着紧密的关系。当燃弧初始相位角在0°~90°、180°~270°之间时,燃弧能量、燃弧时间与燃弧长度都普遍偏大;增加触头的间隙会使得燃弧能量减少,从而使得燃弧时间随之减少,虽然有一定的几率增加燃弧的长度但是由于燃弧能量的降低使得电弧长度普遍减少;降低触头的分断速度对减少燃弧的能量有一定的帮助,同时对于磁保持继电器的来讲,降低触头分断速度也有助于防止触头弹跳的发生。根据继电器电弧特性分析结果对样品继电器的机械参数进行了优化。以优化后的继电器与样品继电器为实验对象,进行继电器电寿命实验。通过对比实验结果可知,优化后的磁保持继电器电寿命有了明显的提升,证明了交流磁保持继电器电弧理论分析的正确性。研究成果对进一步提高交流磁保持继电器的稳定性与使用寿命具有积极意义。该论文有图46幅,表9个,参考文献53篇。更多还原

【Abstract】 The Alternating-Current(AC)magnetic latching relay is a new type of relay with the advantages of small size,low PCB mounting power consumption,strong load capacity,safety and reliability,and long life.However,during the process of opening and closing the AC magnetic latching relay,an arc is generated between the contacts.Due to the action of the arc,the contacts are electrochemically corroded,which seriously affects the stability of the relay.In order to increase the stability and electrical life of the AC magnetic latching relay,this paper studies the arc characteristics of the AC magnetic latching relay.Firstly,the mechanical structure of the AC magnetic latching relay was simulated,and a simulation experiment device of the magnetic latching relay was designed.Using the experimental device,the contact breaking simulation experiment of the magnetic latching relay was carried out under different power supply voltages,different loop currents,different contact gaps and different contact breaking speeds,and the data collected by the high-speed camera and the upper computer was processed,the arcing energy,arcing time and arc length under different experimental conditions are obtained.By analyzing the AC arc characteristics of the experimental results,the following conclusions are drawn: increasing the loop current and the power supply voltage will increase the arcing energy,arcing time and arc length,and the initial phase angle of the arc is closely related to the three arc characteristics.Relationship.When the initial phase angle of arcing is between 0°~90° and 180°~270°,the arcing energy,arcing time and arcing length are generally too large;increasing the clearance of the contacts will reduce the arcing energy.Therefore,the arcing time is reduced,although there is a certain chance to increase the length of the arc,but the arc length is generally reduced due to the decrease of the arc energy;reducing the breaking speed of the contact has a certain help to reduce the energy of the arc,and at the same time For magnetic latching relays,reducing the breaking speed of the contacts also helps prevent contact bounce.The mechanical parameters of the sample relay were optimized based on the analysis results of the relay arc characteristics.Taking the optimized relay and sample relay as experimental objects,the relay electrical life test was carried out.By comparing the experimental results,it can be seen that the optimized electrical life of the magnetic latching relay has been significantly improved,which proves the correctness of the theoretical analysis of the AC magnetic latching relay arc.The research results have positive significance for furtherimproving the stability and service life of AC magnetic latching relays.更多还原