IGBT型高热流密度模拟热源的PLC控制  

PLC Control for IGBT Type Simulated Heat Source with High Heat Flux

作　　者：孔艳梅[1,2] 李运华[2] 何刘宇[2,3] 丁一峰[2] 吴逸飞[4] 

机构地区：[1]山东水利职业学院机电工程系,山东日照276826 [2]北京航空航天大学自动化科学与电气工程学院,北京100191 [3]北京航天发射技术研究所,北京100076 [4]南昌航空大学飞行器工程学院,江西南昌330063

出　　处：《机床与液压》2015年第20期153-155,175,共4页Machine Tool & Hydraulics

基　　金：山东省高等学校优秀青年教师国内访问学者项目

摘　　要：基于PLC控制器,以LM3524产生PWM脉冲信号经PC929光电隔离后再经三极管推挽放大驱动IGBT发热的原理设计了一种新型高热流密度模拟热源。为保持热源输出功率的恒定,采用PLC控制水冷喷雾系统,并使用增量式PID算法调节PWM信号的占空比以控制IGBT的通断,从而实现对IGBT发热量的闭环控制。通过485通信实现了在上位机上对整个系统工作状态的实时监控。实验测试表明:所设计的基于PLC的热源功率控制系统响应速度快,系统运行稳定,对喷雾系统的控制达到了预期的冷却效果,发热功率可达到125 W。所设计的模拟热源可用于评价喷雾冷却效果和液压控制阀与执行器中IGBT元件的散热性能,具有很好的应用前景。Based on PLC controller and the heating principle of IGBT, using the regulated voltage signal generated by PLC output module to input LM3524 and to produce PWM pulse signal, and then passing PC929 isolation and the push?pull amplifier of the triode to drive the IGBT, a new type of high density simulated heat source was designed. To maintain a constant heat power output, the PLC was used to control the water spray system, and the PID was used to adjust the duty ratio of PWM signal to control the on?off of the IGBT, and the closed loop control of calorific value with IGBT was constituted. The real time monitoring to the whole system working state was realized by RS485 communication. Experimental results show that the designed heat source power control system has better re?sponse speed and working stability, the designed spray system achieves expected cooling effect and the heating power can reached to 125 W. The designed heat source can be used for evaluating spray cooling effect and the performance of heat?emission of the IGBT com?ponent in hydraulic control valve and actuator, and it is of good application prospect.

关 键 词：PLC PWM IGBT 模拟热源 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]