NDLI: Simulation of Current Profile and AC Loss of HTS Winding Wound by Parallel-Connected Tapes

Content Provider	IEEE Xplore Digital Library
Author	Chen Gu Timing Qu Xiaofen Li Zhenghe Han
Copyright Year	2002
Abstract	Field penetration and ac loss of high-temperature superconductor (HTS) windings wound by parallel-connected (PC) tapes are simulated and calculated. The simulation is given to a winding with six tapes, which are connected to produce either n = 1, 2, 3, or 6 PC current turns. The PC turns are basically organized as two main types according to whether the turn end is soldered or not. The soldering state is controlled by shunt resistances between HTS tapes. Therefore, six independent PC structures are used for simulation. In addition to the HTS tapes, normal conductors, representing the possible reinforcement layers or stabilizer layers, are also built in the finite-element analysis (FEA) model. The simulation is carried out using the FEA software ANSYS, which is combined with the self-developed resistivity-adaption algorithm, a code that can cope with arbitrary FEA software to simulate field penetration into HTS. More importantly, we used the circuit-field analysis, so that we can adjust n values and the shunt resistance independently while we are simulating the field penetration process. AC loss contributed from different parts of the winding is separately studied as Q_HTS, which is hysteresis loss generated in HTS; Q_nor, which is eddy current loss generated in normal conductors; and Q_cc, which is coupling loss generated in shunt resistances. The current profiles and Q_HTS in each tape of the winding are very sensitive to the specific n value. However, the total Q_HTS for different PC structures does not significantly change. Even under overestimation, Q_nor can only be comparable with Q_HTS when the frequency exceeds 1000 Hz. Q_cc is prominent at low transport currents but is naturally restrained at high transport currents.
Sponsorship	Council on Superconductivity Appl. Superconductivity Conference Inc MIT
Starting Page	117
Ending Page	124
Page Count	8
File Size	984489
File Format	PDF
ISSN	10518223
Volume Number	24
Issue Number	1
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Windings High-temperature superconductors Integrated circuit modeling Couplings Eddy currents Conductors simulation AC loss field profile parallel connected (PC) resistivity-adaption algorithm (RAA)
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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