| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2017: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2016: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2015: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
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| Outline of Final Research Achievements |
In this study, focusing on the magnetostriction of grain-oriented electrical steel sheet which is the main factor of transformer noise, we have constructed a technology capable of reducing both iron loss and magnetostriction. We confirmed reduction of iron loss and magnetostriction under arbitrary directional alternating magnetic flux and rotating magnetic flux by applying laser treatment to the surface of the existing grain oriented electromagnetic steel sheet. It was also confirmed that the magnetic domain structure was finely differentiated by laser treatment. This processing technique was applied to the transformer model core and its effect was verified. As a result, iron loss can be reduced and the effectiveness of the vector magnetic characteristic control technology is clarified.
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