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Development of Core Material with High Magnetic Induction and Low Iron Loss for Middle-Frequency Applications  

Cho, Seong-Soo (한전 전력연구원)
Han, Sang-Ok (충남대학교 전기공학과)
Publication Information
The Transactions of the Korean Institute of Electrical Engineers P / v.58, no.2, 2009 , pp. 190-195 More about this Journal
Abstract
Thin-gauged 3% silicon steel sheets having a highly grain-oriented texture have been developed as a core material for applications of middle-frequency (400 Hz ${\sim}$ 10 kHz) devices. The newly developed sheets with a tension coating showed an excellent reduction in iron loss at 400 Hz (iron loss at 1.0 T and 400 Hz = 4.677 W/kg, iron loss at 1.5 T and 400 Hz = 9.742 W/kg) due to high magnetic induction, $B_{10}$(measured induction at 1000 A/m), of over 1.9 T. In cases of frequencies below 400 Hz, magnetic induction, $B_{10}$, of the sample plays a major role to reduce its iron loss as excitation induction increases, whereas, in case of frequency of 1 kHz, thickness dependence becomes dominant due to a lower iron loss at relatively thinner sample. The sheets with a high magnetic induction, therefore, are favorable for high excitation induction (over 1.0 T) and low excitation frequency (below 400 Hz) applications, whereas the sheets that can reduce eddy current loss by reducing thickness or domain wall width are advantageous for low excitation induction (below 1.0 T) and high excitation frequency (around 1 kHz) applications.
Keywords
Core Materials; Thin-Gauged 3% Silicon Steel Sheets; Tension Coating; Iron Loss;
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