| Project/Area Number |
24560347
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Power engineering/Power conversion/Electric machinery
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| Research Institution | Toyo University |
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Principal Investigator |
KATO SHOHEI 東洋大学, 理工学部, 教授 (80103571)
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Project Status |
Completed (Fiscal Year 2014)
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| Budget Amount *help |
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2014: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2013: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2012: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
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| Keywords | サージ / コイル / 変圧器 / 数値電磁界解析 / FDTD法 / モーメント法 / 光電界センサ |
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| Outline of Final Research Achievements |
Spike-like current appears at the early stage of the step response of coils in addition to the current which increases slowly depending on the resistance and the inductance. It is widely noted the spike-like current to be a charging current that flows to the capacitor between windings, so-called stray capacitor until now. However, in this study, we clear the spike-like current that appears to the step response of the coil and decreases stepwise. The enlarged initial stage of the current peak shows stepwise current decay.
In addition to the experiment, we simulated the response by numerical methods, which are based on method of moment and finite deference time domain method to obtain the current, electric field and magnetic field distributions of the coil. The calculated and measured responses were in good agreement. We try to explain the current in electrostatic, electromagnetic induction and transmission line theory.
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