电工技术学报2017，Vol.32Issue(11)：217-224,8.
铁磁元件铁心损耗的低频测量方法
Core Loss Measurement of the Ferromagnetic Components Using Low-Frequency Method Frequency Power Supply
摘要
Abstract
Transformers will have measured no-load excitation characteristics, no-load loss and load loss for factory tests.Generally, a large capacity of industrial-frequency (IF) power supply is needed to measure the no-load loss which mainly consists of core loss.In order to reduce the capacity of testing power supply and make the test equipment portable, a low-frequency power supply rather than IF power supply which was used for core loss measurement of ferromagnetic components, was demonstrated in this paper.By applying several low frequencies voltages, the cure of E/f-PFe(electromotive force/frequency-core loss) via calculating core loss under low-frequency can be first obtained.Core loss under low-frequency of different frequency at constant value of E/f were then calculated through spline interpolation method.Lastly, the converted core loss under IF was determined based on least square method.In addition, experiments were conducted on the current transformer (CT) and single phase power transformer, comparing conversion results which using 15,20,25 Hz with directly measured results under IF, the relative error ε is below 5% and standard deviation of relative error σε is less than 0.9, respectively.These results show that this method possesses high conversion accuracy and stability and reduces the capacity of testing power supply obviously.关键词
铁磁元件/铁心损耗/低频法/最小二乘法/涡流损耗Key words
Ferromagnetic components/core loss/low-frequency method/least squares method/eddy loss分类
信息技术与安全科学引用本文复制引用
刘鑫,姚陈果,梁仕斌,王俊凯,刘涛..铁磁元件铁心损耗的低频测量方法[J].电工技术学报,2017,32(11):217-224,8.基金项目
中国南方电网有限责任公司科技项目资助(K-YN2014-136). （K-YN2014-136）
