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介绍了应用可编程控制器（ＰＬＣ）对直线加速器调制器的直流高压电源系统进行改造而研制的“上位机－ＰＬＣ电源控制系统”。对该控制系统的总体设计方法、结构特点进行了论述。投入运行后的控制系统解决了供电电网电压大幅度波动对机器的影响，为 ｄｅ－Ｑ′ｉｎｇ电路的可靠工作提供了前提保证，从而也为直线加速器的束流稳定提供了保证。
The application of programmable logic controller (PLC) to the linear accelerator modulator DC high voltage power supply system was developed and developed “PC - PLC power control system.” The overall design of the control system, structural characteristics are discussed. Put into operation after the control system to solve the power supply voltage fluctuations on the machine greatly affected the de-Q’ing circuit provides a reliable work to ensure the premise, which also provides a guarantee for the linear accelerator beam stability.