直流偏置对功率铁氧体性能影响的研究

在电力电子技术中应用的铁氧体铁心磁性元件，其铁心中往往存在直流或低频交流预磁化的情况。有关预磁化对铁氧体特性的影响程度不是很明确，因此一般都假设很小，在磁件设计中不预于考虑。本文对有直流偏置的铁氧体的磁导率和损耗进行了测试分析，结果表明在很多情况下，直流偏置的影响非常显著，应该考虑。

Influence of DC bias on properties of power electronic ferrite

In many power electronic applications ferrite cores of magnetic components are biased with a DC or low|frequency premagnetization. Because the information about their influence on ferrite's properties is very limited, the effects are not considered in the component design. This paper focuses on the varieties of ferrite's permeability and core loss with DC bias. The results measured indicate that the influence of DC bias is very obvious in some applications and can not be neglected.