某电源模块内部电阻硫化原因分析及解决措施  

Analysis of the causes of internal resistance sulfation of a power supplymodule and solution measures

作　　者：卢炳 LU Bing(China Airborne Missile Academy,Luoyang 471001,China)

机构地区：[1]中国空空导弹研究院,河南洛阳471001

出　　处：《通信与信息技术》2023年第6期62-64,共3页Communication & Information Technology

摘　　要：针对某电源模块内部电阻硫化问题进行分析,发现电阻硫化的主要原因是该电源模块未对电阻采取防硫化措施,灌封胶吸附积聚外部硫化氢气体与电阻银钯电极发生化学反应产生不导电的硫化银,导致电阻阻值增大失效。经过大量的分析和试验验证最终确定了某型聚氨酯三防漆+某型有机硅阻燃导热灌封胶的改进方案,该方案可以有效提高该电源模块的抗硫化能力。For a power module internal resistance sulfation problem analysis,found that the main reason for resistance sulfation is that the power module does not take anti-sulfuration measures for the resistance,potting adhesive adsorption accumulation of external hydrogen sulfide gas and resistance of the silver palladium electrode chemical reaction produces non-conductive silver sulfide,result⁃ing in resistance resistance value increases failure.In this paper,after a lot of analysis and experimental verification of the final deter⁃mination of a certain type of polyurethane three-proof paint+a certain type of silicone flame retardant thermally conductive potting ad⁃hesive improvement program,the program can effectively improve the power module's anti-sulfuration capability.

关 键 词：电源模块 片式电阻 银钯电极 硫化 

分 类 号：TJ760[兵器科学与技术—武器系统与运用工程]