| Project/Area Number |
02045041
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| Research Category |
Grant-in-Aid for international Scientific Research
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| Allocation Type | Single-year Grants |
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| Section | University-to-University Cooperative Research |
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| Research Institution | Musashi Institute of Technology |
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Principal Investigator |
TAKADA Tatso Musashi Institute of Technology, 工学部, 教授 (10061532)
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| Co-Investigator(Kenkyū-buntansha) |
王 友功 西安交通大学, 助教授
KOBAYASHI Kohichi Musashi Institute of Technology, 工学部, 助教授 (90097171)
LIU Rongsheng Xian Jiaotong University
WANG Yougong Xian Jiaotong University
MARKUS Zahn マサチューセッツ工科大学, 教授
彭 宗仁 西安交通大学, 助教授
劉 ろー生 西安交通大学, 助教授
ZAHN Markus マサチューセッツ工科大学, 教授
李 英 西安交通大学, 講師
劉 〓生 西安交通大学, 講師
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| Project Period (FY) |
1990 – 1992
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| Project Status |
Completed (Fiscal Year 1992)
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| Budget Amount *help |
¥5,100,000 (Direct Cost: ¥5,100,000)
Fiscal Year 1992: ¥1,500,000 (Direct Cost: ¥1,500,000)
Fiscal Year 1991: ¥1,800,000 (Direct Cost: ¥1,800,000)
Fiscal Year 1990: ¥1,800,000 (Direct Cost: ¥1,800,000)
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| Keywords | Space Charge / Electro-optic Pokels Effect / Electro-optic Kerr Effect / Surface Charge Distribution / dc Electrical Insulation / Electrical Power Cable / Electrical Insulation Solid Materials / Electrical Insulation Liquid Materials / 電荷空間 / 電気光学力一効果 / XLPE / 不平等電界分布 / ヘテロ電荷 / ホモ電荷 |
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| Research Abstract |
This research program was basically accomplished as followings :
(1) Measurement for the distribution of accumulated space charge in the solid insulator a coaxial cable. (Dr.Liu)
A modification of an earlier technique, to measure the distribution of space charge in insulation of a coaxial cable, under both dc and ac stress was studied. The mathematical analysis was developed on the basis of acoustic propagation wave propagating in media with cylindrical geometry of coaxial cable. In order to measure the charge distribution in ac electric fields at any phase shift technique has been employed.
(2) Measurement of the surface charge distribution on insulating materials using Pockels effect. (Mr.Wang)
High sensitive and high resolution measurement technique of the two-dimensional surface charge distribution was developed by using a spatial optical phase modulation and image Lockin amplifing technique. The new method which involves the use of a He-Ne laser, BSO crystal and a high-speed CCD camera enables the observation of ac surface discharge pattern and determination of the density on an insulationing film in each polarity of ac voltage.
(3) Measurement of the two-dimensional electric field vector in dielectric liquids. (Mr. Peng)
The measurement technique of the electric field vector intensity and its direction in transformer insulating oil under dc stress was developed on the basis of the Kerr electrooptic effect. The new method which involves the electric field modulation, the elliptically polarized incident light and non-polarizing beamsplitter techniques enables the observation of the two-dimensional dc electric field vector in dielectric liquids
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