摘要
研究了在电力电子电路中常用的环形磁芯涡流损耗的计算问题,通过展开环形磁芯,建立了易于处理的涡流损耗计算模型,解决了环形磁芯因为结构问题无法建立电磁场方程的困难,并利用积分变换的方法求解电磁场方程,得到了以单重级数表示的涡流损耗计算公式。该公式具有计算简单、速度快和不受应用范围限制的优点,有一定的实用价值,由于该公式适用于任意频率,因此,对研究非正弦激励时磁芯的涡流损耗有重要意义。
Because of the structure of toroidal cores, it is difficult to established a model for computing of eddy-current power loss. In this paper, by simply choosing to open the actual core, established electromagnetic equation of computing ,and solved the equation by means of integral transform, then a new set of eddy current loss formulas were raised. Compared with former formulas, this method is easy, accurate ,efficient and not confined for the practical applications. Since it is frequency dependent, the formulas is also valid and significant for toroidal core excited with nonsinusoidal current.
出处
《电子技术应用》
北大核心
2009年第4期82-85,共4页
Application of Electronic Technique
关键词
电力电子
涡流损耗
环形磁芯
贝塞尔函数
power electronics
eddy-current power loss
toroidal cores
Bessel function
