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Analysis of Iron Loss in Magnetic Material using Time-Periodic Finite Element Method Taking Account of Hysteresis and Eddy Current

考虑磁滞和涡流的时间周期有限元法分析磁性材料的铁损

基本信息

批准号：
09650319
负责人：
TAKAHASHI Norio
金额：
$ 2.3万
依托单位：
Okayama University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1997
资助国家：
日本
起止时间：
1997 至 1998
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09650319/
关键词：
magnetic field analysis iron loss hysteresis eddy current time-periodic FEM Preisach model

项目摘要

3-D time-periodic finite element method and modeling technique of hysteresis loop are developed in order to establish 3-D nonlinear magnetic field analysis method for the accurate analysis of iron loss in electric machines. Moreover, the flux and iron loss in model core are also analyzed and measured.1. Development of 3-D Time-Periodic Finite Element MethodThe time-periodic method which can directly obtain the ac steady state phenomenon is introduced to 3-D finite element method using edge element. Then, a code for solving 3-D ac steady state magnetic field within a practical CPU time can be developed.2. Development of Modeling Technique of Hysteresis LoopThe modified Preisach model using the inverse distribution function is conceived so that the magnetic field strength can be directly obtained from the given flux density. By using this method, the CPT time can be considerably reducedin the magnetic field analysis taking account of hysteresis.3.Measurement of Hysteresis LoopAs the dc hysteresis loop is necessary in magnetic field analysis, the magnetic measurement method under the extremely low frequency less than 0.01Hz is developed by utilizing the digital integration of the output of an H coil.4. Analysis of Flux and Iron Loss of Core and MeasurementsThe flux distribution in model core is analyzed, and the method for calculating the hysteresis and eddy current losses from the calculated hysteresis loop is investigated. The analyzed results of flux and iron loss are compared with measured ones.

为了建立电机铁损精确分析的三维非线性磁场分析方法，发展了三维时间周期有限元法和磁滞回线建模技术。此外，还对模型铁芯的磁通和铁损进行了分析和测量.三维时间周期有限元法的发展本文利用棱边单元将可直接得到交流稳态现象的时间周期法引入三维有限元法。在此基础上，编制了一个在实际CPU时间内求解三维交流稳态磁场的程序.磁滞回线建模技术的发展提出了利用逆分布函数的修正Preisach模型，使磁场强度可以直接由给定的磁通密度得到。3.磁滞回线的测量由于直流磁滞回线在磁场分析中是必不可少的，本文提出了一种利用H线圈输出的数字积分，在极低频（小于0.01Hz）下进行磁场测量的方法.分析了模型铁芯中的磁通分布，研究了由磁滞回线计算磁滞损耗和涡流损耗的方法。对磁通和铁损的分析结果与实测结果进行了比较。