Abstract
The direct current (DC) voltage–current characteristic of parallel multifilamentaryBi2223/Ag tapes, the simplest case of two parallel tapes, is numerically simulated andmeasured by the conventional four-probe method at 77 K and in self-field. The circuitof the parallel tapes is equivalent to a concentrated constant-circuit model bywhich the effective resistance and then the voltage are calculated with differenttransport current. The results show that there is an anomalous voltage peak in thevoltage–current relation before the transporting current reaches its critical current; thevalues are in good agreement with those obtained from measurements. Therefore,the concentrated constant-circuit models can be used to explain the observedanomalous voltage peak due to current redistribution between the two parallel tapes.
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