【作者】 李玲玲； 马东娟； 李志刚；

【Author】 LI Lingling;MA Dongjuan;LI Zhigang;Province-Ministry Joint Key Laboratory of Electromagnetic Field and Electrical Apparatus Reliability Hebei University of Technology;

【机构】 河北工业大学电磁场与电器可靠性省部共建重点实验室；

【摘要】 鉴于电器产品传统可靠性评价方法较强依赖失效寿命数据,而对大量实时工作的电器产品个体进行评估的不足,以电器产品的一个子类一电磁继电器为例,提出了一种以触点电接触状态监测数据为依据进行电器产品实时可靠性评估的方法。根据监测得到的继电器触点电接触状态信息和历史寿命数据计算基本故障率函数,采用极大似然估计法对模型参数进行估计,建立触点电接触比例故障率可靠性评估模型,给出继电器可靠度随动作次数的变化曲线,应用实例说明该方法对继电器进行实时可靠性评价是有效的。该方法将继电器触点动态接触电阻与可靠性评价建立关系,实现了继电器触点电接触状态的实时可靠性评估,为电器产品的实时可靠性评估提供参考。更多还原

【Abstract】 The traditional reliability evaluation methods rely on the lifetime data of electrical products strong,but not suit for a large number of real-time working individuals on reliability evaluation.Electromagnetic relay,one subclass of electrical products,for example,Proposed a real-time reliability assessment method based on condition monitoring data on electrical contact for relay contacts.Calculate the basic life function according to contact status monitoring information and historical lifetime data.Estimate the model parameters through by maximum likelihood estimation method.Establish Proportional hazards model(PHM) for reliability evaluation model on electrical contact.The reliability curve with the frequency of operation of relay is given.Application examples on real-time relay reliability evaluation verified the effectiveness of this method.Build the relationship between dynamic contact resistance of relay contacts and reliability evaluation.Achieved the real-time reliability assessment on electrical contact performance on contacts of relay,and provided a reference for reliability assessing of electrical products in real time.更多还原