摘要
介绍了利用运算放大器组成的电流放大器的原理、电路,并用此电路扩大互感器校验仪的量限,用来解决二次电流为毫安级电流互感器的误差测试。实践证明此方法是可行的。
The paper introduces the principle and the circuit compositions of the electric current amplifier composed by calculation amplifier.The electric circuit can be used to enlarge the measuring limit of the inductor calibration instrument so as to examine the measuring error of the electric current inductor with mA-class secondary electric cur-rent.
出处
《电测与仪表》
北大核心
2002年第6期51-52,55,共3页
Electrical Measurement & Instrumentation
关键词
电流放大器
电流互感器
校验仪
误差
测量
electric
current amplifier
current transformer calibrator
error
measurement
