Iron Loss Evaluation of Reactor Core With Air Gaps by Magnetic Field Analysis Under High-Frequency Excitation
Iron Loss Evaluation of Reactor Core With Air Gaps by Magnetic Field Analysis Under High-Frequency Excitation
复制标题
高频励磁下磁场分析评估有气隙电抗器铁损
DOI：
10.1109/tmag.2015.2442984
复制
发表时间：
2015
影响因子：
2.1
通讯作者：
T. Konishi
中科院分区：
文献类型：
--
作者：
S. Odawara;Shogo Yamamoto;K. Sawatari;K. Fujisaki;Y. Shindo;N. Yoshikawa;T. Konishi
磁场分析表明，在高频励磁条件下，利用有气隙的实际电抗器测量到的实际电抗器损耗与材料表损耗之间的差异是由电抗器气隙附近的漏磁引起的。在我们之前的测量中，与电抗器芯材料的数据损耗相比，高频激励下的实际电抗器损耗变得很大。为了弄清原因，我们进行了三维磁场分析。因此，由于电抗器间隙附近漏磁密度引起的涡流损耗增大，以及漏磁引起的铁损耗分布不均匀，电抗器损耗大于数据表损耗。
It is revealed by magnetic field analysis that a difference between an actual reactor loss and a material datasheet loss, which was observed by measurement using an actual reactor with air gaps under high-frequency excitation, is caused by leakage magnetic flux near the air gaps of a reactor. In our previous measurement, an actual reactor loss under high-frequency excitation became large compared with a datasheet loss of the reactor core material. To clarify the reason, we carry out a 3-D magnetic field analysis. As a result, due to the increasing eddy current losses by leakage magnetic flux density near reactor gaps and due to the ununiform distributions of an iron loss caused by leakage magnetic flux, the reactor loss becomes larger than that of the datasheet loss.