中文摘要：

针对电工材料供应商提供的磁性材料中电磁性能数据与实际数据有较大差距的问题,提出基于双爱泼斯坦方圈的加权测量法对复杂工况条件下硅钢片（30Q120）的电磁性能进行测量,即测量等效磁路长度、激磁伏安和硅钢片比损耗在不同频率和不同取样角度下的变化曲线,从而使仿真建模所使用的磁化曲线和损耗曲线更接近硅钢片真实的运行状态,增强仿真计算有效性。通过实验验证了等效磁路长度和硅钢片比总损耗在不同环境温度下的变化趋势,且所获实验结果对实际变压器铁心设计和变压器铁心综合损耗系数评价也具有参考价值。

英文摘要：

Since there is a big difference between the practical data of electromagnetic performance and the data of the magnetic material given by the supplier,this paper proposes to measure electromagnetic performance of silicon steel sheet（ 30Q120） under complicated working condition with weighted measurement method based on double Epstein frame,a method which works out the change curve of equivalent magnetic circuit length,excitation voltammetry and specific loss of silicon steel sheet with different frequency and angle,so as to make the magnetic curve and loss curve applied by simulated modeling approach to the real operation condition and to enhance the effectiveness of simulation calculation. The result of experiment verifies the change trend of equivalent magnetic circuit length and specific loss of silicon steel sheet under different temperature,and provides reference for practical transformer core design and evaluation on transformer core comprehensive loss coefficient as well.