A5011939671- Superconducting Materials and Applications
- Physics of Superconductivity and Magnetism
- HVDC Systems and Fault Protection
- Education and Learning Interventions
- Educational Research and Pedagogy
- High voltage insulation and dielectric phenomena
- Metallurgical Processes and Thermodynamics
- Thermal Analysis in Power Transmission
- Frequency Control in Power Systems
- Gender and Technology in Education
- Advancements in Solid Oxide Fuel Cells
- Particle accelerators and beam dynamics
- Non-Destructive Testing Techniques
- Fault Detection and Control Systems
- Analytical Chemistry and Sensors
- Magnetic and transport properties of perovskites and related materials
- Inorganic Fluorides and Related Compounds
- Higher Education and Teaching Methods
- Student Assessment and Feedback
- Electrical and Thermal Properties of Materials
- Power Systems and Technologies
- Electrostatic Discharge in Electronics
- Magnetic Properties and Applications
- Advanced Fiber Optic Sensors
- Superconductivity in MgB2 and Alloys
Showa Corporation
1998-2023
Kyushu University
2015-2017
Jumonji University
2005-2009
A triaxial high-temperature superconducting (HTS) cable for practical systems was installed in the chemical plant of a private company (BASF Japan), and large-scale demonstration test performed. An HTS (REBa <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> Cu xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> O xmlns:xlink="http://www.w3.org/1999/xlink">7-δ</sub> ) with length 200 m used, it laid at height approximately 6 above ground...
REBCO superconducting tapes have excellent critical current properties even at high temperature and magnetic field. Many projects for the research development of machines devices with are in progress worldwide. The important problem to realize them is ac loss reduction since most part thermal load cryocoolers loss. evaluation induced windings also quite design system, especially cooling system. In this study, we investigated applicability scaling law stacked using currently fabricated tapes....
For the power line between a generator and step-up transformer, isolated bus (IPB) is generally used. The present IPB has normal cylindrical conductor made of aluminum or copper at center outer jacket generates very huge Joule loss. To decrease it, superconducting buses have been developing. In this study, 22-kV 3-kA triaxial was designed fabricated with YBa2Cu3O7-d (YBCO) tapes various kinds properties were investigated. Previously, ac lightning impulse withstand voltage test, critical...
The superconducting cable for an electric propulsion system of airplane was developed using coated conductors (CCs). To lighten the cable-weight, stacked without center core were employed, leading to reduction diameter and effectively reducing weight. demonstrated reasonable high <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">I<sub>c</sub></i> values DC current. Additionally, revised loading AC Gaps in insulators craft-papers spacers added...
Superconducting coated conductors made of REBCO—REBa <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> Cu xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> O xmlns:xlink="http://www.w3.org/1999/xlink">7–</sub> <italic xmlns:xlink="http://www.w3.org/1999/xlink"><sub>δ</sub></i> , where RE is a rare earth element (Y, Gd, Sm, Nd, Eu, etc.), potentially improve the performances motors, generators, transformers, and cables superconducting...
When conventional power cables are replaced with superconducting ones, it is necessary to realize a large transmission capacity low heat-road from an economic standpoint. In this regard, the isolation bus (IPB), which used connect generator step-up transformer in plants, one of potential candidates achieve this. We have been developing 22 kV class triaxial as alternative IPB Y <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">1</sub> Ba...
A 22-kV 10-kA HTS superconducting bus was designed and manufactured with YBCO tapes. triaxial configuration adopted to minimize the ac loss of cable without shielding layer. The tapes were prepared by a TFA-MOD (trifluoroacetic acid-metal organic deposition) method on substrate sputter-IBAD technique. First, bath-cooling completed down 77 K liquid nitrogen in atmospheric pressure, we observed current-versus-voltage characteristics. critical current I <sub...
A large-scale demonstration test of a triaxial high-temperature superconducting (HTS) cable for practical system was performed in chemical plant private company. The 200 m-long HTS (REBCO: REBa <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> Cu xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> O xmlns:xlink="http://www.w3.org/1999/xlink">7-δ</sub> ) cable, which manufactured by connecting 3 cables using 2 joints via snake-shaped layout,...
The ac loss properties of stacks nonstriated and striated REBa <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> Cu xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> O <italic xmlns:xlink="http://www.w3.org/1999/xlink"><sub>y</sub> </i> (REBCO, RE = rare earth elements, Y, Gd, Eu) superconducting tapes were investigated over a wide range temperature magnetic field amplitude, compared with each other. results obtained show that the...
We developed a tri-axial superconducting cable system with the rated voltage of 22kV and operating current 3 kA at liquid nitrogen temperature. designed termination that was cooled subcooled nitrogen. used in-house YBCO tapes winding machine to prepare conductor Ic -value 4,200 A or more per phase The outer diameters cryostat were approximately 50 mm 130 mm, respectively. length, diameter weight each 4,000 450 600 kg. thickness insulation layer, which made from PPL paper, determined by...
We are developing superconducting magnets for MRI with RE <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">1</sub> Ba xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> Cu xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> O xmlns:xlink="http://www.w3.org/1999/xlink">7-δ</sub> (Re: rare earth, Y, Gd, Eu, REBCO) tapes. Superconducting need the uniformity of produced magnetic field in time and space. The disturbance is mainly caused by induced...
We have been developing triaxial superconducting cable supprted by New Energy and Industrial Technology Development Organization (NEDO) since 2015. The target thereof is replacement for Isolated Power Bus (IPB) which has capacity of 22kV-10kA. manufactured prototype 15m-long 3kA one set terminations. used in house YBa <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> Cu xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> O...
We developed a turbo-Brayton refrigerator with Ne gas as working fluid for 3 ϕ- 66/6.9kV-2MVA superconducting transformer coated conductors which was bath-cooled subcooled LN2. The two-stage compressor and expansion turbine had non-contact magnetic bearings long maintenance interval. In the future, we intend to directly install heat exchanger into Glass-Fiber-Reinforced-Plastics cryostat of make exchange between this paper investigate behaviour LN2 in test cryostat, heater coils were...