AC loss measurements in HTS coil assemblies with hybrid coil structures

作者：Jiang Zhenan^*; Long Nicholas J; Staines Mike; Badcock Rodney A; Bumby Chris W; Buckley Robert G; Amemiya Naoyuki

来源：Superconductor Science and Technology, 2016, 29(9): 095011.

DOI：10.1088/0953-2048/29/9/095011

• HTS coil assemblies
• AC loss
• double pancake coil

Both AC loss and wire cost in coil windings are critical factors for high temperature superconductor (HTS) AC machinery applications. We present AC loss measurement results in three HTS coil assemblies at 77 K and 65 K which have a hybrid coil structure comprising one central winding (CW) and two end windings (EWs) wound with ReBCO and BSCCO wires with different self-field I-c values at 77 K. All AC loss results in the coil assemblies are hysteretic and the normalized AC losses in the coil assemblies at different temperatures can be scaled with the Ic value of the coil assemblies. The normalised results show that AC loss in a coil assembly with BSCCO CW can be reduced by using EWs wound with high I-c ReBCO wires, whilst further AC loss reduction can be achieved by replacing the BSCCO CW with ReBCO CW. The results imply that a flexible hybrid coil structure is possible which considers both AC loss and wire cost in coil assemblies.

• 出版日期2016-9