Abstract
The alternating-current (AC) losses in the 20-cm Bi-2223/Ag tape cold dielectric high-temperature superconducting (CD HTS) test cable are experimentally evaluated. The method used is the electrical method which is based on a lock-in amplifier. Firstly, the AC losses of the CD HTS cable which has two conductor layers and one shield layer are measured. Then, in order to eliminate the error caused by joint resistance, a test is designed to measure the joint resistance of each layer. The measured losses that eliminated the error due to joint resistance are found to be in good agreement with calculated ones with the monoblock model, Carr, and Magnusson equations at the frequencies of 50 ∼ 300 Hz. Finally, the errors caused by joint resistance and other uncertain factors are discussed.
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