基于NTC热敏电阻的温度实时在线监测技术研究  

Research on real-time on-line temperature monitoring technology based on NTC thermistor

作　　者：王蓓蓓 张良 武丹 董亮 张加林 Wang Beibei;Zhang Liang;Wu Dan;Dong Liang;Zhang Jialin(China EPRI Electric Power Engineering Co.,Ltd.,Beijing 102200,China;Beijing DC Transmission&Distribution Engineering Technology Research Center,Beijing 102200,China)

机构地区：[1]中电普瑞电力工程有限公司,北京102200 [2]北京市直流输配电工程技术研究中心,北京102200

出　　处：《电子技术应用》2022年第2期107-110,共4页Application of Electronic Technique

基　　金：国家电网有限公司总部科技项目。

摘　　要：对于以IGBT为主的半导体器件来说,结温升高会严重影响其工作特性,进而影响其构成的电力电子装置的可靠性。提出了一种基于NTC热敏电阻的温度实时在线监测技术。利用IGBT模块内部集成的负温度系数(NTC)热敏电阻,将温度信号转化为频率信号,通过光纤隔离后输入至逻辑处理芯片(CPLD),经逻辑处理后在上位机进行温度实时显示。该技术具有频率信号可靠性高、温度显示准确等优点。最后搭建温度实时在线监测的工程样机,配合电力电子装置的功率运行试验,测试不同温度下的频率值,对该技术的有效性进行验证。For semiconductor devices,such as IGBT,the high junction temperature will seriously affect the operation characteristics,and such affect the reliability of power electronic devices constructed by them.The real-time on-line temperature monitoring technology based on NTC thermistor is proposed in this paper.By using the negative temperature coefficient(NTC)thermistor integrated inside IGBT module,temperature signals are converted to frequency signals and transferred to the logic processing chip(CPLD)via fiber isolation.The temperature is displayed in real time on computer after logic processing.It has the advantages of high reliability and accurate display.Finally,an engineering prototype of real-time on-line temperature monitoring technology is built to verify the effectiveness of this technology by testing the frequency values at different temperatures under the experiment of the power electronic device.

关 键 词：NTC热敏电阻 IGBT结温 压频变换 实时监测 电力电子装置 

分 类 号：TM133[电气工程—电工理论与新技术]