一种磁性材料剩余损耗统计参数的高效提取方法  

Efficient Method for Extracting Statistical Parameters of Recess Loss of Magnetic Materials

作　　者：宋金薇 李琳[1] 刘任 SONG Jinwei;LI Lin;LIU Ren(State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources,North China Electric Power University,Beijing 102206,China)

机构地区：[1]华北电力大学新能源电力系统国家重点实验室,北京102206

出　　处：《华北电力大学学报（自然科学版）》2020年第3期34-40,共7页Journal of North China Electric Power University：Natural Science Edition

基　　金：国家重点研发计划项目(2017YFB0903902);国家自然科学基金资助项目(51677064).

摘　　要：基于损耗统计理论计算磁性材料的剩余损耗分量之前,需要提取剩余损耗的统计参数。利用传统斜率法从测量结果中提取剩余损耗统计参数时,如果只采用两个频点的数据,精确度不高,保证宽频带下的准确度,则需要处理很多频点的实验数据,计算任务繁重。对此提出一种相比传统斜率法提取剩余损耗统计参数更准确、更简单、更省时的高效提取方法。首先结合磁性材料的磁粘度型动态模型,推导出该动态模型剩余损耗对应磁场强度分量的解析表达式,再基于损耗统计理论,推导出剩余损耗相应磁场强度分量的解析表达式,最后结合两者推导得到损耗统计理论剩余损耗统计参数。实验结果验证了利用提出的剩余损耗统计参数高效提取方法计算磁性材料损耗时的准确性和实用性,该方法对于研究磁性材料的剩余损耗统计参数具有重要的意义。Based on the loss statistics theory,the statistical parameters of excess loss should be extracted before calculating the excess loss of magnetic materials.The drawbacks of the traditional slope extraction method are that the extraction accuracy is low by taking data of two different frequencies and that high accuracy in a wide frequency range requires mass calculation and is thus time-wasting.Therefore,this paper puts forward a simple extraction method of high accuracy.First,we built a viscous-type dynamic hysteresis model and derived an analytical expression of the corresponding excess magnetic field.Next,we based on the loss statistics theory and deduced another analytical expression.Finally,we combined the two analytical expressions to obtain the statistical parameter of excess loss.The experimental results have verified the accuracy and practicability of the proposed extraction method.

关 键 词：损耗统计理论 动态损耗 剩余损耗统计参数 

分 类 号：TM271[一般工业技术—材料科学与工程]