2012 Fiscal Year Final Research Report
Comprehensive and multifaceted study of the electrical properties of nano-composite insulating material
| Project/Area Number |
22360114
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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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 | Toyohashi University of Technology |
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Principal Investigator |
NAGAO Masayuki 豊橋技術科学大学, 大学院・工学研究科, 教授 (30115612)
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| Co-Investigator(Renkei-kenkyūsha) |
MURAKAMI Yoshinobu 豊橋技術科学大学, 大学院・工学研究科, 准教授 (10342495)
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| Project Period (FY) |
2010 – 2012
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| Keywords | LDPE / MgO / ナノコンポジット / 直流前課電 / 空間電荷 |
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| Research Abstract |
To understand the space charge formationand the breakdownof low-density polyethylene (LDPE) / nano-sized magnesium oxide(MgO) nanocomposite materials, the breakdown strength,the space charge distribution and conduction current influenced by DC prestress were investigated. DC breakdown strength (Fb) of LDPE decreased with increase of DC prestress. This is probablybecause the bulk of LDPE became more conductive condition by the generation of a packet like chargeduring the prestress. On the other hand, DC-Fb of LDPE/MgO nanocomoposite increased with increase of DC pre-stress field.It was suggested that the conduction current controlled by the space charge near the electrodesdue to charge trapping of MgO nanofiller closely relatedto the breakdown.
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