非正弦励磁下磁芯损耗的计算

Calculation of Core Losses Under Nonsinusoidal Excitation

磁性元件的损耗在开关电源中占相当大的比例,因此磁芯损耗的计算在开关电源设计中相当重要。文中首先介绍了在正弦励磁下,计算磁芯损耗的Steinmetz经验公式,然后对修正的Steinmetz经验公式进行了回顾。修正后的公式可以用来计算非正弦励磁下的磁芯损耗,同时所需参数和修正前的公式一样。最后介绍修正的Steinmetz经验公式在开关电源领域中的应用。

The losses of magnetic components the calculation of core loss is very important, Firstly occupy a considerable proportion in switching power supply, so the empirical equation of Steinmetz for calculation of the core losses under sinusoidal excitation was introduced, and then modified Steinmetz Equation was reviewed. That approach allows the calculation of core losses under non-sinusoidal excitation while using the available set of parameters of the empirical equation of Steinmetz. Finally application of the modified Steinmetz Equation was introduced for switching power supply.