| 基于单片机的高精度数字直流电流源设计 |
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| 引用本文： | 刘星桥,陆秀银,唐碧强,黄振跃.基于单片机的高精度数字直流电流源设计[J].微计算机信息,2006,22(32):99-102. |
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| 作者姓名： | 刘星桥 陆秀银 唐碧强 黄振跃 |
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| 作者单位： | 212013,镇江,江苏大学电气学院 |
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| 基金项目： | 江苏省自然科学基金;江苏大学校科研和教改项目 |
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| 摘 要： | 本设计以单片机系统为核心,实现了直流电流源的程控电流输出。设计分电源,AD和DA转换,电流源输出,显示和控制模块。系统使用12位的AD和DA芯片,提高了输出电流的精度;输出模块引入PI控制器,有效控制了电路的非线性失真,输出电流无静差跟踪电流给定。实验结果表明:给定电流在20mA-2000mA内变化时,系统输出电流误差小于1mA,电流纹波小于0.2mA。
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| 关 键 词： | 单片机 DA转换 电流源 PI控制 |
| 文章编号： | 1008-0570(2006)11-2-0099-04 |
| 修稿时间： | 2006年2月14日 |
The Design of High Precision Numerical DC Current-source Based on Single Chip Microcomputer |
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| LIU XINGQIAO,LU XIUYIN,TANG BIQIANG,HUANG ZHENYUE.The Design of High Precision Numerical DC Current-source Based on Single Chip Microcomputer[J].Control & Automation,2006,22(32):99-102. |
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| Authors: | LIU XINGQIAO LU XIUYIN TANG BIQIANG HUANG ZHENYUE |
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| Affiliation: | LIU XINGQIAO LU XIUYIN TANG BIQIANG HUANG ZHENYUE |
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| Abstract: | This system has realized numerical control of the DC current-source, taking the single chip microcomputer system as a core. The design includes power source, AD and DA conversion, output module of current-source, demonstration and control module. The system uses 12 bits of AD and DA chip, improving the precision of output current. The output module of current-source has in-troduced the PI controller, controlling the nonlinear distortion of circuit effectively. The output current changed with a given current accurately. The result of experiment indicates that when the given current varies between 20 mA and 2000 mA, the error of output current is less than 1 mA and the ripple of current is less than 0.2 mA. |
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| Keywords: | single chip microcomputer DA conversion current-source PI control |
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