即时传热的压敏电阻过热保护方式  

Instantaneous Heat Transfer Mode to Achieve Overheat Protection for Varistor

作　　者：黄敏超 陈石 许由生 张祥贵 

机构地区：[1]敏业信息科技(上海)有限公司 [2]厦门赛尔特电子有限公司

出　　处：《安全与电磁兼容》2016年第5期77-81,共5页Safety & EMC

摘　　要：列举和分析了多种常见压敏电阻过热保护方式的不足之处,针对压敏电阻过热保护中最关键的热采集和热传递技术,提出一种压敏电阻过热保护方式,将合金型温度保险丝与压敏电阻以最近距离的串联方式集合成一体,使得温度保险丝能够即时吸收压敏电阻所发的热量,在压敏电阻着火前快速切断电路,并用比对实验进行了验证。By listed and analyzed the shortcomings of several common overheat protection methods of varistor, the best protection method for varistor overheat was proposed based on the key heat collection and heat transfer technologies. The method integrated the alloy-type temperature fuse and varistor in series with the shortest distance. Such integration method lets the alloy-type temperature fuse absorb the heat from varistor instantaneously, which can cut off the varistor before burned. Finally, some comparison experiments were carried out for verification.

关 键 词：压敏电阻 过热保护 即时传热 寿命 可靠性 

分 类 号：TM54[电气工程—电器]