GRAIN ORIENTED SILICON STEEL SHEET FOR LOW NOISE TRANSFORMER

摘要

PROBLEM TO BE SOLVED: To provide a grain oriented silicon steel sheet for a low noise transformer capable of reducing higher harmonics, which has louder audibility for human beings, and capable of effectively reducing noise. ;SOLUTION: In this grain oriented silicon steel sheet for a low noise transformer, magnetostiction λ19 (the difference in the shape between the case in which magnetic flux density is 1.9T and the case in which magnetic flux density is 0T. and so forth) is 1.5×10-6 or less, also -0.3×10-6≤λ17-λ19×(1.7/1.9)2≤+0.3×10-6, and also, -0.3×10-6≤λ19×(1.4/1.9)2≤+0.3×10-6 are satisfied.;COPYRIGHT: (C)2001,JPO