谐波平衡有限元法用于饱和铁心的损耗分析

利用一种新的有效的谐波平衡有限元算法 ,结合Lavers等人提出的考虑谐波时迭片铁心的磁滞损耗和涡流损耗的模型 ,提出了一种较准确求解饱和铁心损耗的计算方法。并与传统的计算方法进行了比较。以铁磁型三倍频变压器的空载情况为例进行了仿真计算和物理实验。结果表明 ,考虑谐波磁通密度影响时的铁心损耗值与传统的仅考虑基波磁通密度时的值相比有显著的增加。物理实验验证了所提算法的正确性。为设计工作在高度饱和状态下的电器设备估算铁心损耗提供了有效的分析方法

Analyses of Core Loss for Saturation Iron Using Finite Element Method of Harmonic Balance

In this paper, a finite element scheme based on harmonic balance is used to compute the core losses in saturation iron From the harmonic flux density, the corresponding impact on the eddy current and hysteresis losses was computed combining a well-known method first introduced by Lavers, in conjunction with Epstein core losses curves of the laminations The results of core losses are compared with conventionally compute core losses obtained using only the fundamental components of the flux density waveforms A substantial increase in the core losses due to the significant harmonic contents of the flux density waveforms is reported