DC-DC变换器中大功率高频电感的磁性材料选择

2009 Twenty-Fourth Annual IEEE Applied Power Electronics Conference and Exposition Pub Date : 2009-03-21 DOI:10.1109/APEC.2009.4802955

M. Ryłko, K. J. Hartnett, J. Hayes, M. Egan

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引用次数: 90

摘要

Dc-dc变换器的尺寸和效率是工业、航空航天和汽车应用的驱动因素。因此，最佳的组件选择是必不可少的紧凑的设计。电感器通常是变换器中最大的元件。本文对实际设计中使用的磁性材料进行了分析和实验比较。该研究涉及在中(20 kHz)到高(150 kHz)频率范围和低(1%)到高(220%)电流纹波范围内的dc-dc功率电感的磁性材料选择。研究的材料包括铁基非晶金属、硅钢、纳米晶、铁氧体、铁粉和无间隙粉末材料。介绍了jfe钢铁公司新开发的一种硅钢材料。提出了一种包括导热系数和饱和性能在内的新型材料比较方法。以10kw dc-dc电感设计为例，进行了材料比较的面积产品分析。实验研究了不同材料的铁芯功率损耗随直流偏置的变化规律。采用1.25 kW半桥dc-dc变换器进行实验验证。

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Magnetic Material Selection for High Power High Frequency Inductors in DC-DC Converters

Dc-dc converter size and efficiency are driving factors in industrial, aerospace and automotive applications. Thus, optimal component selection is essential for a compact design. The inductor often appears as the converter's largest component. This paper presents analytical and experimental comparisons of the magnetic materials used in a practical design. The investigation is concerned with magnetic material selection for a dc-dc power inductor in the medium (20 kHz) to high (150 kHz) frequency range and the low (1%) to high (220%) current ripple range. The materials under investigation are iron-based amorphous metal, silicon steel, nanocrystalline, ferrite, powdered iron and gap-less powder materials. A newly developed silicon steel material from JFE-Steel Co. is presented. A novel material comparison which includes thermal conductivity and saturation capability is proposed. The area product analysis for material comparison is presented for 10 kW dc-dc inductor design examples. The variation of core power loss with dc-bias is experimentally investigated for different materials. A 1.25 kW half-bridge dc-dc converter is used in experimental validation.

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2009 Twenty-Fourth Annual IEEE Applied Power Electronics Conference and Exposition

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