郭森林,朱江淼,耿西西,潘仙林,石照民,金涛.基于参考电流增量法的感应分流器校验方法[J].电测与仪表,2024,61(10):175-180. Guo Senlin,Zhu Jangmiao,Geng Xixi,Pan Xianlin,Shi Zhaomin,Jin Tao.Calibration of inductive current divider based on reference current increment method[J].Electrical Measurement & Instrumentation,2024,61(10):175-180.
基于参考电流增量法的感应分流器校验方法
Calibration of inductive current divider based on reference current increment method
Inductive current divider has high accuracy and high stability of current ratio, which is widely used in the verification of current transformer and other fields. In this paper, a method for calibrating inductive current divider based on the principle of reference current increment method is proposed, and the basic principle of reference current increment method is introduced; the design principles of reference current transformer and differential current measurement circuit are analyzed; the experimental circuit for the self-calibration of the inductive current divider is built; the developed two-stage inductive current divider is calibrated in the frequency range of 50 Hz～1 kHz, and the uncertainty of the calibration result is analyzed. The experimental results show that, in the frequency range of 50 Hz～1 kHz, the measurement synthetic standard uncertainty of the ratio difference of the two-stage inductive current divider is better than 5×10-8 A/A, and the measurement synthetic standard uncertainty of the phase difference is better than 1×10-7 rad.
