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http://dx.doi.org/10.9714/psac.2007.9.3.037

Design and test results of a Rogowski coil for measurement of current distribution characteristics in 4-parallel superconducting coils  

Cho, Dae-Ho (연세대 대학원 전기전자공학부)
Yang, S.E. (연세대 대학원 전기전자공학부)
Kim, M.J. (연세대 대학원 전기전자공학부)
Ahn, M.C. (기초전력연구원)
Park, D.K. (연세대 대학원 전기전자공학부)
Bae, D.K. (충주대 공대 안전공학과)
Seok, B.Y. (현대중공업 기계전기연구소)
Ko, T.K. (연세대 공대 전기전자공학부)
Publication Information
Progress in Superconductivity and Cryogenics / v.9, no.3, 2007 , pp. 37-40 More about this Journal
Abstract
Large critical current is one of the prerequisites for the design of superconducting electrical equipments with large power capacity. To enlarge the critical current. multiple parallel connection is inevitable. In multiple parallel superconducting coils. the difference in normal resistance of each shunt leads to unequal current distribution. which may yield burnout. Therefore. uniform current distribution is required for a stable operation of multiple parallel superconducting coils. In this paper, Rogowski coils were fabricated to measure each shunt current of a 4-parallel superconducting coil. Four Rogowski coils were installed at the copper bars, which are used as current leads in superconducting coils. As a result, linearity of the Rogowski coils was ascertained and coefficients of each coil, the ratio of voltage and current, were derived. The coefficients were compared with theoretically calculated values. Based on the coefficients, each shunt current was calculated in a 4-parallel superconducting coil, where uniform current. distribution was confirmed. This paper verified the feasibility of the fabricated Rogowski coils as well as operational stability of the 4-parallel superconducting coil in 77K.
Keywords
Rogowski coil; superconductor; current distribution.;
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