| 一种新型磁放大器式直流电流比较仪 |
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| 引用本文： | 揭秉信,陈宁安,徐恳.一种新型磁放大器式直流电流比较仪[J].华中科技大学学报(自然科学版),2001,29(3):1-3. |
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| 作者姓名： | 揭秉信 陈宁安 徐恳 |
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| 作者单位： | 华中科技大学电力工程系 |
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| 摘 要： | 研究了一种新型直流电流比较仪，它包括两个环节：双向自饱和磁放大器和双铁芯自饱和磁放大器。前者为敏感元件，后者为功率放大器，由此构成一闭环系统，其中并有一特殊补偿绕组，用以改善量程低端的计量特性。仪器结构简单，稳定可靠，初始电流极小，在10%-100%额定电流范围内，读数的相对误差不超过0.2%，其性能优于现有各种工业上用的直流大电流测量装置。
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| 关 键 词： | 电流测量 直流电流比较仪 磁放大器 线路结构 工作原理 补偿绕组 |
| 文章编号： | 1000-8616(2001)03-0001-03 |
| 修稿时间： | 2000年4月17日 |
A New Type of DC Current Comparator with a Magnetic Amplifier |
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| Jie Bingxin,Chen Ningan,XU Ken.A New Type of DC Current Comparator with a Magnetic Amplifier[J].JOURNAL OF HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY.NATURE SCIENCE,2001,29(3):1-3. |
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| Authors: | Jie Bingxin Chen Ningan XU Ken |
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| Abstract: | A new type of DC current comparator is researched which includes two parts: a bidirectional self-saturating magnetic amplifier and a two-care self-saturating magnetic amplifier. The former is used as a sensor, and the latter as a power amplifier which are constituted a closed loop system. In the system there is a special compensation winding in order to improve its metering performance in the low side of measurement range. The instrument has the following characteristics such as: simple construction; well stability and reliability; very small inital current; a relational error of reading value exceeding 0.2?% in range of rated current 10?%～100?%. |
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| Keywords: | current measurement DC current comparator magnetic amplifier |
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