27 August 2017 to 1 September 2017
RAI Congress Center, Amsterdam, The Netherlands
Europe/Amsterdam timezone

Magnetization loss in REBCO Roebel cables with varying strand numbers

30 Aug 2017, 13:15
1h 45m
Posters Area

Posters Area

Poster Presentation of 1h45m G4 - Losses in Conductors and Coils Wed-Af-Po3.12

Speaker

Mr Wei Zhou (School of Electrical Engineering, Beijing Jiaotong University)

Description

Assembled coated conductors are essential in many high current HTS applications. There are two ways to achieve assembled coated conductors. One way is to vertically stack the coated conductors, and the other is to use continuously transposed Roebel cables. In addition to high current carrying capacity, Roebel cables offer both low AC loss and mechanical flexibility. In this work, we measured magnetization loss in REBCO Roebel cables with varying strand numbers from six to fourteen at 77 K to investigate the number dependence of AC loss characteristics of the Roebel cables. The source material for the Roebel strands are non-stabilized 10 mm-wide Fujikura REBCO wires (FYSC-SC10). The wires were punched into 4 mm-wide Roebel strands, and the transposition length for the Roebel cables is 300 mm. The applied field amplitude, frequency and the angle of the applied field to the wide face of the Roebel cables are varied. Three 10 mm-wide vertical stacks with the conductor number of seven, five, and three were prepared using the same source Fujikura materials to demonstrate the AC reduction effect of the Roebel cables over the vertical stacks. The measured magnetization loss values of the Roebel cables are compared with those of the reference stacks as well as numerical results for the Roebel cables and stacks obtained from COMSOL software.

Submitters Country China

Primary authors

Mr Wei Zhou (School of Electrical Engineering, Beijing Jiaotong University) Dr Zhenan Jiang (Robinson Research Institute, Victoria University of Wellington)

Co-authors

Dr Michael Staines (Robinson Research Institute, Victoria University of Wellington) Mr Wenjuan Song (School of Electrical Engineering, Beijing Jiaotong University) Dr Chris Bumby (Robinson Research Institute, Victoria University of Wellington) Dr Rodney Badcock (Robinson Research Institute, Victoria University of Wellington) Prof. Nicholas Long (Robinson Research Institute, Victoria University of Wellington) Prof. Jin Fang (School of Electrical Engineering, Beijing Jiaotong University)

Presentation Materials