程控电话交换机用 PTC 过流保护器的研究  

STUDY OF PTC OVERCURRENT PROTECTOR FOR PROGRAM-CONTROLLED SWITCHBOARD

作　　者：陈亿裕[1] 夏继红[1] 

机构地区：[1]华南理工大学材料学院

出　　处：《华南理工大学学报（自然科学版）》1997年第5期61-65,共5页Journal of South China University of Technology(Natural Science Edition)

基　　金：广东省科委1993年度重点攻关科研项目

摘　　要：采用居里点３５３～３８３Ｋ，温度系数＋１６％以上，电阻率３０Ω·ｃｍ的ＰＴＣ半导体陶瓷材料制成的电流敏感器件———程控电话交换机用ＰＴＣ过流保护器，已研制成功并投入使用。现从材料制造角度出发，阐述该器件的设计原理、测试方法，对器件的耐流特性进行较深入的研究。An overcurrent protector current sensitive device, used for a program controlled switchboard is successfully developed and put to use, which is made of PTC semiconductive ceramics with its curie point 353 K to 383 K, temperature coefficient over +16% and resistivity 30 Ω·cm. This paper deals mainly with its design theory and experimental measument, especially with its anti overcurrent property.

关 键 词：程控电话交换机 电流敏感器件 过流保护器 耐流特性 半导体陶瓷 居里点 

分 类 号：TN373[电子电信—物理电子学]