Abstract
The additional AC loss due to forming three-strand transposed parallel conductors with REBa <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> Cu <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> O <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><sub>y</sub></i> (REBCO, RE = rare earth) superconducting tapes, are investigated theoretically and experimentally. In this study, supposing that the two transposition points deviate by arbitrary length from optimal ones in three-strand parallel conductor, the theoretical expression of the additional AC loss was derived. For the derivation of theoretical expressions, the voltage-current characteristics of REBCO tapes were taken into account by using a <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">n</i> -value model. The additional AC loss was measured via pick-up-coil method under an applied AC magnetic field with various amplitudes and frequencies. The validity of the theoretical expressions was confirmed by accordance between theory and experiment.
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