2013 Fiscal Year Final Research Report
Simulations of corona charge neutralisation of insulators
| Project/Area Number |
23510214
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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 |
Social systems engineering/Safety system
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| Research Institution | National Institute of Occupational Safety and Health, Japan |
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Principal Investigator |
OHSAWA Atsushi 独立行政法人労働安全衛生総合研究所, 電気安全研究グループ, 上席研究員 (20358435)
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| Research Collaborator |
野村 信雄 春日電機, 部長
大内 幹夫 東京電機大学, 教授
MORROW R. University of Sydney, Honorary
MURPHY A. B. CSIRO, Senior Principal Scientist
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| Project Period (FY) |
2011 – 2013
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| Keywords | 除電 / コロナ放電 / イオン / 電気流体力学シミュレーション / 静電気障災害 / 火災 / 減災 / 品質管理 |
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| Research Abstract |
The purpose of this study is to clarify the phenomena of the corona charge neutralisation of insulators. We investigated the behaviour of ions during neutralisations with different density distributions of initial surface charges on an insulator and compared it with a conductor charge neutralisation using 2D electrohydrodynamic simulations of positive and negative ions. Since the motion of ions near the charged insulator is influenced by the charges not only on the front side surface but also on the opposite side, we found that it can lead to over-neutralisation causing problems. On this point, the phenomena of insulator charge neutralisation is significantly different from those of conductor one; thus, we investigated the validity of the standard evaluation test method of ionisers using a conductor. We suggest a proper use of ionisers to avoid the over-neutralisation. In addition, a method for minimising the offset voltage obtained from the simulation was demonstrated experimentally.
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