Low Residual Induction Silicon Steel Sheet.

Namikawa, Misao; Takada, Yoshikazu; Hiratani, Tatsuhiko; Yamaji, T.; Ninomiya, H.

doi:10.2320/materia.37.289

Cited by 6 publications

(6 citation statements)

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“…3 Furthermore, Si-gradient steel sheets are also being developed by CVD siliconizing process. 4,5 At high frequency, the Si-gradient steel sheet shows lower iron loss than 6.5% Si steel sheet despite the average Si content being less than 6.5%. 5 The developed steel sheet is mainly used as a core material of a high frequency reactor driven at 10 kHz or more.…”

Section: Introductionmentioning

confidence: 96%

“…4,5 At high frequency, the Si-gradient steel sheet shows lower iron loss than 6.5% Si steel sheet despite the average Si content being less than 6.5%. 5 The developed steel sheet is mainly used as a core material of a high frequency reactor driven at 10 kHz or more. It was also found that the loss deterioration of the Si-gradient steel sheet under compressive stress is very small as compared with ordinary steel sheets.…”

Section: Introductionmentioning

confidence: 96%

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Investigation of the magnetic properties of Si-gradient steel sheet by comparison with 6.5%Si steel sheet

Hiratani¹,

Zaizen²,

Oda³

et al. 2018

AIP Advances

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ARTICLES YOU MAY BE INTERESTED INEffect of wheel speed on magnetic and mechanical properties of melt spun Fe-6.5 wt.% Si high silicon steel AIP Advances 8, 056111 (2018) In this study, we investigated the magnetic properties of Si-gradient steel sheet produced by CVD (chemical vapor deposition) siliconizing process, comparing with 6.5% Si steel sheet. The Si-gradient steel sheet having silicon concentration gradient in the thickness direction, has larger hysteresis loss and smaller eddy current loss than the 6.5% Si steel sheet. In such a loss configuration, the iron loss of the Si-gradient steel sheet becomes lower than that of the 6.5% Si steel sheet at high frequencies. The experiment suggests that tensile stress is formed at the surface layer and compressive stress is formed at the inner layer in the Si gradient steel sheet. The magnetic anisotropy is induced by the internal stress and it is considered to affect the magnetization behavior of the Si-gradient steel sheet. The small eddy current loss of Si-gradient steel sheet can be explained as an effect of magnetic flux concentration on the surface layer. © 2018 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license

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Section: Introductionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 96%

Investigation of the magnetic properties of Si-gradient steel sheet by comparison with 6.5%Si steel sheet

Hiratani¹,

Zaizen²,

Oda³

et al. 2018

AIP Advances

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“…As shown in Fig. 1, a gradient Si steel sheet features by Si concentration gradient in thickness direction with Si content of 6.5 wt% in the surface layer and 3 wt% Si in the inner layer [8,9]. Eddy current loss of the gradient Si steel sheet is effectively reduced by increasing the Si content in the surface layer, which outperforms the 6.5% Si steel at 10 kHz or above in iron loss properties.…”

Section: Introductionmentioning

confidence: 99%

Effect of Compressive Stress on Iron Loss of Gradient Si Steel Sheet

Oda¹,

Hiratani²,

Kasai³

et al. 2016

Elect Comm in Japan

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SUMMARY A gradient Si steel sheet, which has high Si content in the surface layer and low Si content in the center of the thickness, shows extremely low iron loss in the high‐frequency range. In this paper, the magnetic properties of gradient Si steel sheets under compressive stress were investigated. In a 3.5% Si steel sheet, the iron loss under compressive stress increases with increase in compressive stress. On the other hand, a gradient Si steel sheet shows extremely low iron loss under compressive stress. This decrease is due to the residual tensile stress in the surface layer of the gradient Si steel sheet. To evaluate the effect of core materials on the iron loss of the motor, we fabricated interior permanent magnet motors using 3% Si steel, 6.5% Si steel, and gradient Si steel sheets. In the motor using a 3% Si steel sheet, the motor loss increases after the heat shrinking. On the other hand, in the motors using 6.5% Si steel and gradient Si steel sheets, the motor loss shows little change after the heat shrinking.

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“…Si-gradient steel sheets have a very low remanent flux density [6] and very small eddy current loss, which results in lower iron loss at high frequencies than 6.5% Si steel sheet [7]. Si-gradient steel sheets have a very low remanent flux density [6] and very small eddy current loss, which results in lower iron loss at high frequencies than 6.5% Si steel sheet [7].…”

Section: Introductionmentioning

confidence: 99%

“…In this CVD siliconizing process, steel sheets with silicon concentration gradient in the thickness direction (below referred to as Si-gradient steel sheets) can be obtained when the sheets are cooled before the silicon derived from SiCl 4 is homogenized. Si-gradient steel sheets have a very low remanent flux density [6] and very small eddy current loss, which results in lower iron loss at high frequencies than 6.5% Si steel sheet [7]. These intriguing properties are difficult to explain solely by the heterogeneous composition.…”

Section: Introductionmentioning

confidence: 99%

Magnetization Mechanism of Si‐Gradient Steel Sheet Manufactured by CVD Siliconizing Process

Hiratani¹,

Namikawa²,

Ninomiya³

et al. 2015

Electrical Engineering Japan

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Si-gradient steel sheet, which has a silicon concentration gradient in the sheet thickness direction, manufactured by the chemical vapor deposition siliconizing process, possesses unique magnetic properties. In this paper, the magnetization behaviors of single crystals of Si-gradient steel sheet are investigated in the <100> and <110> directions, comparing with Si-homogeneous steel sheet, in order to clarify the magnetization mechanism. The internal stress of Si-gradient steel sheet was evaluated. The induced magnetic anisotropy which arising according to the magnetoelastic effect is considered to play an important role in the magnetization process of Si-gradient steel sheet. The reduction of eddy current loss can be explained by the effect of the magnetic flux concentration at the sheet surface resulting from the internal stress. C⃝ 2015 Wiley Periodicals, Inc. Electr Eng Jpn, 193(2): 18-29, 2015; Published online in Wiley Online Library (wileyonlinelibrary.com).

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Low Residual Induction Silicon Steel Sheet.

Cited by 6 publications

References 0 publications

Investigation of the magnetic properties of Si-gradient steel sheet by comparison with 6.5%Si steel sheet

Investigation of the magnetic properties of Si-gradient steel sheet by comparison with 6.5%Si steel sheet

Effect of Compressive Stress on Iron Loss of Gradient Si Steel Sheet

Magnetization Mechanism of Si‐Gradient Steel Sheet Manufactured by CVD Siliconizing Process

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