一种交流恒流电源的设计
张帆
（福建省产品质量检验研究院，福建 福州 350002）
摘 要：针对国内低压电器试验室普遍存在试验电源输出不稳定问题，设计了一种交流大电流、可调节的智能化恒流源，该恒流源以可编程逻辑控制器作为控制核心，以两级调压装置作为执行机构，以液晶触摸屏作为人机交互界面，配合变压器、电量隔离传感器等元器件形成一套闭环控制系统，并采用PID 控制算法对系统进行精确地控制，实现了输出电流稳定、精确度高、可调节等功能。
关键词：恒流源；可编程逻辑控制器；两级调压；PID 控制算法
中图分类号：TM919 文献标识码：A 文章编号：1007-3175(2016)07-0019-04
Design of an Alternating Current Constant Current Power Supply
ZHANG Fan
（Fujian Inspection and Research Institute for Product Quality, Fuzhou 350002, China）
Abstract: Aiming at defects such as power output instability in low voltage electrical apparatus test room, this paper designed a kind of alternating current, large current, adjustable intelligentized constant flow source, which took the programmable logic controller as the controlling core, with the two level regulator as the executive body, with the liquid crystal display (LCD) touch screen as a man-machine interface, with the transformer, power isolation sensor, relay, transformer and other components to form a closed loop control system. The proportion integration differentiation (PID) control algorithm was used to control the system accurately, realizing stable output current, high accurate and adjustable functions.
Key words: constant current source; programmable logic controller; two level regulating; proportion integration differentiation control algorithm
参考文献
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