直流偏磁したモデル変圧器の鉄損と騒音特性
論文ID: 1202R002
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論文ID: 1202R002
The iron losses and acoustic noises of a model transformer core made of grain-oriented electrical steel sheets were investigated under DC biased magnetization while altering the amplitude of magnetic flux density, Bm, and the DC biased magnetic field, HDC, applied by the third windings. The iron loss increased as HDC increased up to100 A/m, while over 100 A/m, the increment of iron loss by DC biased field rapidly decreased. The increase in iron loss at the same HDC was largest at Bm:1.1−1.5 T. Meanwhile, the acoustic noise increased monotonically as HDC increased. The acoustic noise of odd-order harmonics was drastically increased under DC biased magnetization, and this is the primary cause of the increase in acoustic noise.
