Numerical simulation on AC loss in REBCO tapes carrying non-sinusoidal currents  

作　　者：Katsuya Uejima Yueming Sun Daisuke Miyagi Jakub Glowacki Nicholas J.Long Zhenan Jiang 

机构地区：[1]Department of Electrical and Electronic Engineering,Chiba University,Chiba 263-8522,Japan [2]Paihau-Robinson Research Institute,Victoria University of Wellington,Wellington 6140,New Zealand

出　　处：《Superconductivity》2023年第4期18-25,共8页超导（英文）

基　　金：supported by the New Zealand Ministry of Business,Innovation and Employment under Catalyst Space and Fusion project“International Science Co‐operation on Superconductor Technologies”contract number RTVU1916;supported by the New Zealand Ministry of Business,Innovation and Employment under the Advanced Energy Technology Platform program“High power electric motors for large scale transport”contract number RTVU2004.

摘　　要：AC loss is one of the greatest obstacles for high‐temperature superconducting(HTS)applications.In some HTS applications,coated conductors carry non‐sinusoidal currents.Thus,it is important to investigate the effect of various waveforms on AC loss in coated conductors.In this work,transport AC loss in a 4 mm‐wide REBCO coated conductor carrying sinusoidal and non‐sinusoidal currents,is numerically investigated.The current amplitudes,the frequency of the transport current,and n‐value are varied.Non‐sinusoidal transport current waveforms studied include square,five types of trapezoidal,and triangular waveforms.Simulated results show that,for a given current amplitude,AC loss for the square current waveform is the greatest,that for the triangular waveform is the smallest.The sequence of AC loss in the conductor for different current waveforms coincides with the penetration depth,which implies the penetration depth determines the AC loss of the coated conductor.Furthermore,the transport AC loss in the conductor was found to decrease with frequency as f2=n for non‐sinusoidal transport current.

关 键 词：REBCO coated conductors AC loss Non‐sinusoidal current 

分 类 号：O44[理学—电磁学]