华中科技大学学报(自然科学版)
華中科技大學學報(自然科學版)
화중과기대학학보(자연과학판)
JOURNAL OF HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY
2001年
3期
1-3
,共3页
揭秉信%陈宁安%徐恳
揭秉信%陳寧安%徐懇
게병신%진저안%서간
电流测量%直流电流比较仪%磁放大器
電流測量%直流電流比較儀%磁放大器
전류측량%직류전류비교의%자방대기
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.
研究瞭一種新型直流電流比較儀，它包括兩箇環節:雙嚮自飽和磁放大器和雙鐵芯自飽和磁放大器.前者為敏感元件，後者為功率放大器，由此構成一閉環繫統，其中併有一特殊補償繞組，用以改善量程低耑的計量特性.儀器結構簡單，穩定可靠，初始電流極小，在10?%～100?%額定電流範圍內，讀數的相對誤差不超過0.2?%，其性能優于現有各種工業上用的直流大電流測量裝置.
연구료일충신형직류전류비교의，타포괄량개배절:쌍향자포화자방대기화쌍철심자포화자방대기.전자위민감원건，후자위공솔방대기，유차구성일폐배계통，기중병유일특수보상요조，용이개선량정저단적계량특성.의기결구간단，은정가고，초시전류겁소，재10?%～100?%액정전류범위내，독수적상대오차불초과0.2?%，기성능우우현유각충공업상용적직류대전류측량장치.
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?%.
