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Supercooled-Al Transformer

Memoirs of the Faculty of Engineering, Yamaguchi University Volume 20 Issue 1 Page 105-112
published_at 1969
KJ00002361185.pdf
[fulltext] 498 KB
Title
低温Al変圧器
Supercooled-Al Transformer
Creators Kobayashi
Source Identifiers
Year after year, the electrical power to be consumed in the world becomes larger, and also power transformers must become larger in size and heavier in weight. In this paper, prospects for employment of deeply cooled Al conductors as transformer windings are considered. At liquid hydrogen temperature, 20°K, Al exhibits a resistivity of 3×10^<-11>Ωm, and it is about 1/1000 times of a normal Cu resistivity. For this subject some considerations are given by K.J.R. Wilkinson, but this paper makes examinations of it from a different standpoint. At the beginning, for a three-phase core-type transformer general expressions of its loss, weight, size, etc. are introduced in a simple case, and then using the obtained expressions, 190MVA three-phase transformers with supercooled-Al windings are designed, to be compared with the conventional transformer. From this culculations it results that in the case of maximum flux density B_m to be equal to conventional value the supercooled-Al transformer is about 1/3.5 times of a conventional one in loss and weight, and in the case of B_m to be decreased so that the transformer weight may be equal to conventional value the diminution of about 1/5.3 times is obtained in loss.
Subjects
電気電子工学 ( Other)
Languages jpn
Resource Type departmental bulletin paper
Publishers 山口大学工学部
Date Issued 1969
File Version Version of Record
Access Rights open access
Relations
[ISSN]0372-7661
[NCID]AN00244228
Schools 工学部