Journal
MATERIALS
Volume 12, Issue 19, Pages -Publisher
MDPI
DOI: 10.3390/ma12193173
Keywords
soft magnetic; ferrite; ceramic; transformer core; demagnetization factor; losses
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Funding
- University POLITEHNICA of Bucharest, through the Excellence Research Grants Program, UPB-GEX 2017 [UPB- GEX2017, 3/2017]
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A soft magnetic MnZn-type ferrite is considered for high frequency applications. First, the morphological, structural, and chemical composition of the material are presented and discussed. Subsequently, by using a vibrating sample magnetometer (VSM), the hysteresis loops are recorded. The open magnetic circuit measurements are corrected by employing demagnetization factors, and by taking into consideration the local magnetic susceptibility. Finally, the hysteresis losses are estimated by the Steinmetz approach, and the results are compared with available commercial information provided by selected MnZn ferrite manufacturers. Such materials are representative in planar inductor and transformer cores due to their typically low losses at high frequency, i.e., up to several MHz, in low-to-medium power applications and providing high efficiency of up to 97%-99%.
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