| 双重磁检测器电流比较仪的开环特性研究 |
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| 引用本文： | 张智杰,任士焱,马爱清,周术.双重磁检测器电流比较仪的开环特性研究[J].计量学报,2003,24(2):141-143. |
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| 作者姓名： | 张智杰 任士焱 马爱清 周术 |
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| 作者单位： | 1. 华中科技大学电气与电子工程学院,湖北武汉,430074;华中光电研究所,湖北武汉,430074
2. 华中科技大学电气与电子工程学院,湖北武汉,430074 |
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| 基金项目： | 国家自然科学基金 (5 98770 0 6，5 0 2 770 18) |
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| 摘 要： | 介绍了一种全新的直流大电流测量方法 ,这种方法是基于磁调制器和磁放大器双重磁检测器原理。文中对这种双重磁检测器的开环特性进行了理论计算和试验测试。理论计算和试验测试均表明其开环传输特性只有零安匝一个过零点 ,克服了传统磁调制器的开环传输特性曲线有若干过零点的缺陷和弊端 ,大大提高了系统闭环后的稳定性和可靠性 ,且在零安匝附近灵敏度高、线性好 ,同时具备了磁调制器和磁放大器的优点
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| 关 键 词： | 计量学 电流测量 双重磁检测器 磁调制器 磁放大器 开环特性 |
| 文章编号： | 1000-1158(2002)02-0141-03 |
| 修稿时间： | 2002年6月7日 |
The Theoretical Analysis of Open-loop Characteristic for Double Magnetic Detector Comparator |
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| ZHANG Zhi jie ,REN Shi yan ,MA Ai qing ,ZHOU Shu.The Theoretical Analysis of Open-loop Characteristic for Double Magnetic Detector Comparator[J].Acta Metrologica Sinica,2003,24(2):141-143. |
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| Authors: | ZHANG Zhi jie REN Shi yan MA Ai qing ZHOU Shu |
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| Affiliation: | ZHANG Zhi jie 1,2,REN Shi yan 1,MA Ai qing 1,ZHOU Shu 1 |
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| Abstract: | A fire new double detector sensing theory with magnetic modulator and magnetic amplifier is discussed. The open loop characteristic of the double detector is calculated in theory and the double magnetic detector comparator is constructed for testing and performance evaluation. Both the calculation and testing prove that the open loop characteristic of the double detector comparator has only one operating point corresponding to zero ampere turns, not other zero output points so called false balance points. The double detector comparator possesses not only high sensitivity, low drift, high linearity and good antimagnetic property from magnetic modulator comparators, but also the perfect stability and reliability from magnetic amplifiers. |
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| Keywords: | Metrology Current measurement Double magnetic detecter Magnetic modulator Magnetic amplifier Open-loop characteristic |
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