Development of a Superconducting Transformer for Rolling Stock

Abstract:

Having undertaken studies into a lightweight and highly efficient superconducting transformer for rolling stock, we developed a prototype with a primary winding, four secondary windings and a tertiary winding using Bi-2223 high temperature superconducting wire. Its primary voltage is 25kV, which is widely adopted as the catenary voltage on the world's high-speed lines. We adopted liquid nitrogen cooling, the weight being 1.71t excluding the refrigerator. The maximum output available to maintain superconductivity is 3.5MVA. We also introduce railways in Japan.

• Periodical: Advances in Science and Technology (Volume 47)
• Pages: 204-211
• DOI: https://doi.org/10.4028/www.scientific.net/AST.47.204
• Online since: October 2006
• Authors: Hiroyuki Fujimoto, Hiroshi Hata, Hiroki Kamijo, Ken Nagashima, Kazuya Ikeda, Masataka Iwakuma, Kazuo Funaki, Hisao Yamada, Yasutaka Sanuki, Akira Tomioka, Ken Etsu Uwamori, Shigeru Yoshida
• Keywords: AC Loss, BSCCO Wire, Cryostat, Output, Railway, Transformer

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