CAJ | 학술논문

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。
기우PLC공제기，이LM3524산생PWM맥충신호경PC929광전격리후재경삼겁관추만방대구동IGBT발열적원리설계료일충신형고열류밀도모의열원。위보지열원수출공솔적항정，채용PLC공제수랭분무계통，병사용증량식PID 산법조절PWM신호적점공비이공제IGBT적통단，종이실현대IGBT발열량적폐배공제。통과485통신실현료재상위궤상대정개계통공작상태적실시감공。실험측시표명：소설계적기우PLC적열원공솔공제계통향응속도쾌，계통운행은정，대분무계통적공제체도료예기적냉각효과，발열공솔가체도125 W。소설계적모의열원가용우평개분무냉각효과화액압공제벌여집행기중IGBT원건적산열성능，구유흔호적응용전경。
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.