期刊
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
卷 501, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.jmmm.2019.166373
关键词
Amorphous soft magnetic alloys; Transformer; Stacked core; Tension annealing; Rapid annealing
History of Fe-based amorphous and nanocrystalline soft magnetic alloys is reviewed and our recent progress in these materials in magnetic devices such as transformers is reported. For lower-rated transformers, a thinner Fe-based amorphous alloy ribbon is found to have an advantage for core loss due to the reduced residual bending stress at the corners of a wound core as well as smaller eddy current loss. For large transformer cores, a prototype Fe-based amorphous alloy ribbon-based stacked core is built using a 142 mm wide commercially available ribbon prepared by tension annealing. With the optimization of glue and joint technique for a stacked core, it is found that core loss of a stacked-core with a polyester glue and a step-lap joint is lower than that of a conventional wound core in the excitation range between 1 and 1.45 T at 50 Hz.
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