Conference Publication Details
Mandatory Fields
Rylko, MS,Hartnett, KJ,Hayes, JG,Egan, MG,
Magnetic Material Selection for High Power High Frequency Inductors in DC-DC Converters
APEC: 2009 IEEE APPLIED POWER ELECTRONICS CONFERENCE AND EXPOSITION, VOLS 1- 4
2009
April
Validated
1
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Optional Fields
Magnetic materials Inductor size analysis
2043
2049
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.
Grant Details