| Project/Area Number |
09650325
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
電力工学・電気機器工学
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| Research Institution | KYOTO UNIVERSITY |
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Principal Investigator |
HOSHINO Tsutomu Kyoto University, Graduate School of Engineering, Associate Professor, 工学研究科, 助教授 (10209231)
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| Co-Investigator(Kenkyū-buntansha) |
SUZUKI Morio Saga University, Faculty of Science and Engineering, Professor, 理工学部, 教授 (70039254)
MUTA Itsuya Kyoto University, Graduate School of Engineering, Professor, 工学研究科, 教授 (70039270)
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| Project Period (FY) |
1997 – 1999
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| Project Status |
Completed (Fiscal Year 1999)
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| Budget Amount *help |
¥3,200,000 (Direct Cost: ¥3,200,000)
Fiscal Year 1999: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 1998: ¥1,300,000 (Direct Cost: ¥1,300,000)
Fiscal Year 1997: ¥1,100,000 (Direct Cost: ¥1,100,000)
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| Keywords | Superconductivity / Device / Powerelectronics / Switch / Converter / Synchronous rectification |
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| Research Abstract |
Turn-off characteristics test of the superconducting power electronics device has been performed.
Loss reduction of the trigger energy, which is obstacle for practical use, has been studied. As first step of device development, we tried to make the channel-gate junction as follows ; (1) We proposed the oxidization of the clad copper on the surface of NbTi. We tried to make the channel and the insulator layer. (2) We proposed a vapor deposition method. We tried to make the insulator layer on the NbTi channel and the gate layer. (3) We tried to glue NbTi foil and NiCr foil with Teflon sheet under certain heat. It forms the channel-insulator-gate pile structure. (4) We arranged the data such as basic characteristics of the device and rectification, and presented at the international conference etc. (5) We reported at international conference etc. on the trial to reduce the thermal resistance between the channel and the gate. (6) We revealed next application on moving flux type flux-pump un
… More
der rotating condition, and presented in Applied Superconductivity Conference and The Transactions of The Institute of Electrical Engineers of Japan.
Obtained results reveal the possibility of "Thermally-Controlled Superconducting Switch " for rectifying device. The study on reducing turn-off energy is requied. There is no feasibility without improvement of switching efficiency. The method of thin insulation layer are established under this project. Performance test of the model switch has been proceeded, and the standard data for comparing improvement of heater efficiency. Furthermore, (1) This controlled rectifying device consists of the multi-layer of superconductor, insulator and heater. With each of thin layer, less thermal conductivity is preferred. To improve switching efficiency, establish the method to yield the insulator and heater layer with low thermal resistance. (2) Fabricate the device which operate under line frequency with minimum switching loss and a few milli-seconds recovery time. (3) Clear the relationships of switching characteristics and the structural (design) parameters with many R＆D devices. (4) Establish the circuit configuration of the synchronous rectifier circuit with the superconducting transformer. (5) Investigate the feasibility to apply the oxide superconductivity, through its characteristics evaluation. To fabricate switching device, we proposed Research Project Grant-in-Aid for Scientific Research (B)(2) "Study on Thermally-Controlled Superconducting Circuit and Device for Synchronous Rectifier of Line Frequency". Less
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