电测与仪表2017，Vol.54Issue(1)：8-15,8.
现场校准用磁调制式直流电流比较仪磁屏蔽结构仿真研究与设计
Simulation study and design of the magnetic shielding structure of the DC current comparator based on magnetic modulator for field calibration
摘要
Abstract
Strong electromagnetic interference and some uncertain environmental factors exit when the direct current ( DC) transformer is calibrated on the work field .Therefore, the standard DC current comparator should not only have much high measuring accuracy , but also require the strong ability to resist electromagnetic interference .Firstly, the paper establishes the simulation model of the magnetic shielding structure of the direct current comparator ( DCC ) based on magnetic modulator with the ANSYS software , which is used as the reference for the field calibration .The influence of the thickness of the shielding , magnetic conductivity of the shielding material and gap on the magnetic shielding effectiveness is analyzed .According to the simulation results , the design of the magnetic shielding structure is carried out .Secondly , this paper analyzes the influence of the eccentric bus and interference magnetic field genera-ted by the nearby conductor on the measuring accuracy of the DCC without and with the magnetic shielding structure respectively .In the end , the prototype of the DCC with the nominal parameter of 5000 A:5 A is developed .The tes-ting results of the prototype confirm the simulation results and the effectiveness of the designed structure .The total ac-curacy of the developed DCC is up to 0.005 level, which is satisfied with the requirement of the applications .关键词
直流电流互感器/现场校准/磁调制式直流电流比较仪/磁屏蔽Key words
direct current transformer/field calibration/DC current comparator based on magnetic modulator/mag-netic shielding分类
信息技术与安全科学引用本文复制引用
林国营,潘峰,易斌,张鼎衢,徐雁,柏航..现场校准用磁调制式直流电流比较仪磁屏蔽结构仿真研究与设计[J].电测与仪表,2017,54(1):8-15,8.基金项目
国家863项目(2015AA050404) （2015AA050404）
