AC loss measurement of HTS coils with ferromagnetic disks

Manufacturing techniques for low AC loss high-T/sub c/ superconducting coils are necessary to realize high efficiency superconducting power equipments. High-T/sub c/ superconducting tape conductors have anisotropic magnetic field dependence on critical current and AC magnetization loss. A magnetic f...

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Bibliographic Details
Published in:IEEE transactions on applied superconductivity 2003-06, Vol.13 (2), p.2356-2359
Main Authors: Furuse, M., Kondoh, J., Tanaka, H., Umeda, M.
Format: Article
Language:English
Subjects:
Alternating current
Anisotropic magnetoresistance
Applied sciences
Coils
Conducting materials
Conductors
Critical current
Electronics
Exact sciences and technology
High temperature superconductors
Loss measurement
Magnetic field measurement
Magnetic fields
Magnetization
Manufacturing
Mathematical models
Pancake coils
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
Superconducting coils
Superconducting devices
Superconducting films
Superconducting tapes
Superconductivity
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Summary:Manufacturing techniques for low AC loss high-T/sub c/ superconducting coils are necessary to realize high efficiency superconducting power equipments. High-T/sub c/ superconducting tape conductors have anisotropic magnetic field dependence on critical current and AC magnetization loss. A magnetic field component perpendicular to the tape surface degrades HTS coil performance. We numerically investigated a magnetic field adjusting method and AC loss reduction effects by attaching ferromagnetic materials to both ends of HTS coils. We also measured total AC loss of an HTS coil comprising 10 HTS double pancake coils by the boil-off method. Total AC loss of the coil was dominated by mechanical loss due to vibration and movement of conductors and pancake coils. In this paper, methods to reduce total AC loss of HTS coils are discussed.
ISSN:1051-8223
1558-2515
DOI:10.1109/TASC.2003.813068