| Project/Area Number |
26630110
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Power engineering/Power conversion/Electric machinery
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| Research Institution | Nagoya University |
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Principal Investigator |
KOJIMA Hiroki 名古屋大学, 工学研究科, 准教授 (00377772)
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| Co-Investigator(Kenkyū-buntansha) |
早川 直樹 名古屋大学, 工学研究科, 教授 (20228555)
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2015: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2014: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
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| Keywords | 電気機器工学 / 真空電気絶縁 / 直流機器 / 極性反転 / 帯電 / 電荷挙動 / 真空中電気絶縁 / 直流 / 沿面放電 |
|---|
| Outline of Final Research Achievements |
For extending of the range of the application of vacuum insulating electric apparatus, e.g. vacuum circuit breakers, we have to consider the effect of change of charging distribution at the polarity reversal of dc voltage. In this study, we focused on the charging phenomena on the dielectric surface in vacuum, and investigated the charge behavior on the dielectric surface at the polarity reversal.
From the temporal evolutions of charging potential and light emission, at the polarity reversal of dc voltage, it was revealed that the charge neutralization without flashover occurred with the time constant of a few ms to a dozen ms, which is relatively slow.
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