000029107 001__ 29107
000029107 005__ 20181203015713.0
000029107 0247_ $$2doi$$a10.1016/j.physc.2003.09.044
000029107 02470 $$2ISI$$a000187852100042
000029107 02470 $$2DAR$$a4600
000029107 037__ $$aARTICLE
000029107 245__ $$aModelling the E-J relation of high-Tc superconductors in an arbitrary current range
000029107 269__ $$a2004
000029107 260__ $$c2004
000029107 336__ $$aJournal Articles
000029107 520__ $$aFor describing the E-J relation of high-Tc superconductors (HTS) in power applications, where the applied current I is generally limited by Ic, the critical state model, a piecewise linear generalization, or a simple power-law of the type E=Ec(J/Jc)^n are most often used. The power-law cannot be used for modelling the E-J relation with I>>I_c due to the unbound exponential increase of the electric field for currents above Ic, while in reality the non-linear HTS resistivity is limited by its normal state value. This paper presents a modified E-J model for describing the V-I characteristic of HTS tapes with applied currents largely exceeding Ic. This model is based on the power-law in combination with a parallel metallic branch and has a limited resistivity - the HTS one in the normal state. It can be used for black-box modelling of superconductors in a unlimited current range, as well as for numerical modelling of superconducting devices, which can be operated at currents far exceeding Ic; for example fault-current limiters or cables with over-critical current excursions. The model has been tested in a simple numerical implementation and the modified power-law has been implemented in finite element method simulations. It is shown that for bulk material with currents above 1.3-2Ic$ (depending on the n-value), the usual power-law results in excessive AC loss estimation.
000029107 6531_ $$aNon-Linear Modelling
000029107 6531_ $$aSuperconductivity
000029107 700__ $$0240113$$aDuron, J.$$g136244
000029107 700__ $$0241633$$aGrilli, F.$$g138310
000029107 700__ $$0240451$$aDutoit, B.$$g105035
000029107 700__ $$0241634$$aStavrev, S.$$g112141
000029107 773__ $$j401$$k1-4$$q231-235$$tPhysica C
000029107 909C0 $$0252097$$pLANOS$$xU10425
000029107 909C0 $$0252330$$pSUPRA$$xU12157
000029107 909CO $$ooai:infoscience.tind.io:29107$$pIC$$particle
000029107 937__ $$aLANOS-ARTICLE-2004-007
000029107 970__ $$a373/LANOS
000029107 973__ $$aEPFL$$rREVIEWED$$sPUBLISHED
000029107 980__ $$aARTICLE
000029107 990__ $$zfield Custom_2 says published, and Custom_6 is 'to be published'