| 一种新型低纹波高精度数控直流电流源 |
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| 引用本文： | 吴谨绎,张永忠,张凌涛.一种新型低纹波高精度数控直流电流源[J].中南林业科技大学学报,2007,27(3):159-162. |
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| 作者姓名： | 吴谨绎 张永忠 张凌涛 |
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| 作者单位： | 中南林业科技大学测绘科学与技术学院 湖南长沙410004(吴谨绎)，中南林业科技大学电子与信息工程学院 湖南长沙410004(张永忠，张凌涛) |
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| 摘 要： | 针对普通直流电流源普遍存在的精度低、调节范围小、稳定性差等缺点,设计了一种新型低纹波高精度数控直流电流源.该系统以AT89S51单片机为核心,采用串联反馈调整结构,以TLV5618产生基准电压,HD7279作为键盘显示接口,采用汇编语言和C语言混合编程实现偏差补偿和人机交互功能.实际测试表明,该电流源可实现20～2 000 mA范围内步进1 mA的精确恒流输出调整,纹波电流低于0.1 mA,且具有良好的交互性.
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| 关 键 词： | 直流电流源 数控电源 高精度 低纹波 |
| 文章编号： | 1673-923X（2007）03-0159-04 |
| 收稿时间： | 2006-12-10 |
| 修稿时间： | 2006-12-10 |
A Novel Digitally Controlled DC Current Source with Low Ripple and High Accuracy |
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| WU Jin-yi,ZHANG Yong-zhong,ZHANG Ling-tao.A Novel Digitally Controlled DC Current Source with Low Ripple and High Accuracy[J].Journal of Central South Forestry University,2007,27(3):159-162. |
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| Authors: | WU Jin-yi ZHANG Yong-zhong ZHANG Ling-tao |
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| Institution: | 1. School of Science and Technology in Surveying and Mapping, Central South University of Forestry and Technology, Changsha 410004, Hunan, China; 2. School of Electronics and Information Engineering, Central South University of Forestry and Technology, Changsha 410004, Hunan China |
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| Abstract: | A novel digitally controlled DC current source was presented to overcome the widely existed drawbacks of traditional DC current source such as low precision,narrow adjusting range and bad stability.Based on a cascaded feedback control structure,the system adopts AT89S51 as the core,the output of TLV5618 as the reference voltage,HD7279 as the keyboard display interface,and uses mixed programming by C language and assembly language to implement the error compensation algorithm and human computer interaction.Test results indicate that accurate DC current output can be obtained with 1 mA stepping adjustment in the range of 20 ~ 2 000 mA,and the current ripple is below 0.1 mA.The system also has good performance on stability and the ability of interaction. |
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| Keywords: | AT89S51 |
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