期刊
PROGRESS IN NATURAL SCIENCE-MATERIALS INTERNATIONAL
卷 27, 期 5, 页码 588-592出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.pnsc.2017.09.002
关键词
Nanocrystalline; Ribbon thickness; Core loss; Domain structure
资金
- National Key Basic Research and Development Programme [2016YFB0300502]
Nanocrystalline soft magnetic materials are widely used in power electronic applications due to their high permeability, magnetization and low core loss. In this paper, Fe73.5Cu1Nb3Si15.5B7 (at%) nanocrystalline alloy ribbons, with ultra-thin thickness of 14 mu m, and also 18 and 22 mu m, were prepared by a planar flow casting method with a single roller device. Soft magnetic properties of these ribbons were analyzed after nanocrystallization annealing. The experiments were conducted on toroidal samples using IWATSU B-H Analyzer over a frequency range of 10-100 kHz, at induction amplitudes of 100-500 mT, at room temperature. It was found that the excess eddy current loss P-ex was the dominant factor in the overall core loss above 10 kHz. The toroidal samples made of the 14 mu m thickness ribbon exhibit very low total core loss of 48 W/kg at a frequency of 100 kHz and magnetic flux density of 300 mT. The ratio of the P-ex was up to 89% at 100 kHz. The ribbon with lower thickness exhibits lower P-ex and therefore lower total core loss. The domain structure evidences were found. It indicates that the ribbons with small thickness are preferable for application in high frequency condition.
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