摘要
精准的IGBT内部结温大小实时在线检测是连铸连轧线上的电磁感应加热电源装置系统正常、可靠、长久运行的前提条件之一。采用光隔离线性光耦技术原理的芯片,结合IGBT内部NTC热敏电阻两端电压采集和V/I、I/V信号转换处理,设计了一种用于实时检测和计算单个IGBT内部结温大小的信号采集电路,并且根据单元模块化和主从机分布式采集系统设计思路,设计一套能够应用于MW级宽功率段的大功率感应加热电源上所有IGBT结温都能实时独立监测的系统。实验结果表明,基于光隔离线性光耦原理的IGBT内部NTC热敏电阻温度采集检测系统能够满足大功率感应加热系统实时监测IGBT结温大小的各项性能需求,而且已成功地集成到自主研发的MW级大功率感应加热电源装置控制系统。
An accurate real-time online detection for the internal junction temperature of IGBT is one of the prerequisite conditions for the normal,reliable and long-term operation of the electromagnetic induction heating power supply system on the continuous casting and rolling line.The paper adopts a chip based on the principle of optically isolated linear optocoupler technology,combined with the voltage acquisition at both ends of the NTC thermistor inside the IGBT and the conversion and processing of V/I and I/V signals,designed a signal acquisition circuit for real-time detection and calculation of the internal junction temperature of a single IGBT,and based on the design concept of unit modularization and master-slave distributed acquisition system,design a real-time and independent monitoring system of all IGBT junction temperatures in MW-class high-power induction heating power supply with wide power range.The results of experiments and practical applications show that,the IGBT internal NTC thermistor temperature acquisition and detection system based on the principle of optically isolated linear optocoupler can meet the performance requirements for real-time monitoring of IGBT junction temperature in high-power induction heating systems,and the system has been successfully integrated into the independently developed MW level high-power induction heating power supply control system.
作者
彭国强
冯然
徐冬
朱春苗
谢佳颖
汪亮
PENG Guoqiang;FENG Ran;XU Dong;ZHU Chunmiao;XIE Jiaying;WANG Liang(Hunan Zhongke Electric Co.,Ltd.,Yueyang 414000,China)
出处
《电工技术》
2025年第16期213-216,共4页
Electric Engineering
关键词
线性光耦
NTC电阻
IGBT结温
在线检测
linear optocoupler
NTC thermistor
IGBT junction temperature
online detection
