| 一种精密有缘绝对值电路的改进与应用 |
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| 引用本文： | 陈国庆,方康玲,刘宇.一种精密有缘绝对值电路的改进与应用[J].武汉科技大学学报(自然科学版),2005,28(4):369-371,402. |
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| 作者姓名： | 陈国庆 方康玲 刘宇 |
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| 作者单位： | 武汉科技大学信息科学与工程学院,湖北,武汉,430081 |
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| 摘 要： | 分析了电工和测量技术领域内常用的有源绝对值电路存在的缺陷，设计了一种精密有缘绝对值电路，作为电枢电流采样环节的一部分将其应用到基于DSP的电机控制系统中，并结合DSP对其A／D通道的“过采样”技术，扩大了电机电枢电流采样的窗口，提高了采样的分辨率和控制精度。
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| 关 键 词： | 绝对值 运算放大器 采样 缺陷 控制精度 DSP |
| 文章编号： | 1672-3090（2005）04-0369-04 |
| 收稿时间： | 2004-11-04 |
| 修稿时间： | 2004-11-04 |
Improvement and Application of an Exactitude Power Absolute Circuit |
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| CHEN Guo-qing,FANG Kang-ling,LIU yu.Improvement and Application of an Exactitude Power Absolute Circuit[J].Journal of Wuhan University of Science and Technology(Natural Science Edition),2005,28(4):369-371,402. |
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| Authors: | CHEN Guo-qing FANG Kang-ling LIU yu |
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| Institution: | College of Information Science and Engineering, Wuhan University of Science and Technology, Wuhan 430081, China |
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| Abstract: | This paper analyzes the diadvantage of and measure fields. In light of the principle of the circuit, an exactitude power absolute circuit which overcomes the disadvantage of the afore-mentioned circuit is designed. It is used as part of the armature current sampling in DSP based electromotor control system. Using the excess sampling technique of DSP, the improved circuit has extended the current sampling window and increased the accuracy of sampling and control, working well in actual application. |
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| Keywords: | absolute value operation amplifier excess sampling |
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