2022 Fiscal Year Final Research Report
A study of gas filling and arc discharge suppression mechanism effective for interrupting arc discharge at DC high voltage
| Project/Area Number |
20K04421
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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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| Review Section |
Basic Section 21010:Power engineering-related
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| Research Institution | Nippon Institute of Technology |
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Principal Investigator |
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| Project Period (FY) |
2020-04-01 – 2023-03-31
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| Keywords | 電気接点 / 電磁コンタクタ / 水素 / アーク放電 / 接触抵抗 |
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| Outline of Final Research Achievements |
The electrical contact of the electromagnetic contactor was opened and closed in the air and hydrogen gas, and the effect of the load condition, ambient gas and gas pressure on the generated arc discharge was investigated under an AC circuit. Furthermore, the effect on the contact resistance value was examined. As a result, it was shown that the effect of suppressing arc discharge is remarkable with hydrogen gas, and that arc discharge can be shortened with higher gas pressure. Moreover, the contact resistance value was small and stable in hydrogen gas. In addition, it was found that the inductive load is less effective in suppressing arc discharge than the resistive load.
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| Free Research Field |
電気接点
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| Academic Significance and Societal Importance of the Research Achievements |
電気接点に生じるアーク放電を短時間で消弧するためには、水素ガス中に電気接点を設置することが効果的である。水素ガスが封中された電磁コンタクタが太陽光発電や電気自動車（EV）などの直流回路では実用化されている。本研究では、交流回路のもとで負荷条件とガス圧力がアーク放電の抑制に与える影響を調査した。水素ガスのアーク抑制効果と負荷条件との関連、および接触抵抗を低く抑える効果を示した点において、既存の関連する機器の性能向上に寄与する成果である。
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