| Project/Area Number |
26420231
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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 | Nagoya Institute of Technology |
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Principal Investigator |
MIZUNO YUKIO 名古屋工業大学, 工学(系)研究科(研究院), 教授 (50190658)
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| Research Collaborator |
YOSHIDA ATSUSHI 河村電器産業株式会社, 研究開発部, 主任技師
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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 |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2016: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2015: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2014: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
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| Keywords | 電源コード / 素線 / 短絡 / 電圧波形 / 検出器 / 壁付コンセント / 検出回路 |
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| Outline of Final Research Achievements |
Short-circuit of element conductors in AC power cords of household appliances/extension cords is one of the main causes of fire accidents originating from electric equipment. This kind of short-circuit is observed when a cord is crushed by heavy material, bent and stretched repeatedly, or even the exerted force from earthquake. It is difficult to detect short-circuit with a conventional circuit breaker, because of its smaller current magnitude than the threshold and short duration of short-circuit.
The present research revealed that short-circuit was characterized by distortion of voltage waveform from the sinusoidal shape. A novel detection method was proposed based on the distortion, which enables to distinguish short-circuit from transient phenomena at the time of turning on/off of household appliances. Furthermore, a prototype wall outlet combining short-circuit detector and circuit breaker was made. It was confirmed in laboratory that the detector performed as designed.
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