Self-field Effects and AC Losses in Pancake Coils Assembled from Coated Conductor Roebel Cables

Abstract

In this contribution we develop a refined numerical model of pancake coils assembled from a coated conductor Roebel cable, which includes the angular dependence of the critical current density $J_c$ on the magnetic field and the actual (three-dimensional) shape of the current lead used to inject the current. Previous works of ours indicate that this latter has an important influence on the measured value of the AC losses. For the simulation of the superconductor, we used two alternative models based on different descriptions of the superconductor's properties and implemented in different mathematical schemes. For the simulation of the current lead we use a full three-dimensional finite-element model. The results of the simulation are compared with measurements and the main issues related to the modeling and the measurement of Roebel coils are discussed in detail.

Cited by in corpus (5)

• Review of the AC Loss Computation for HTS using the H-formulation
• Self-consistent Modeling of the $I_c$ of HTS Devices: How Accurate do Models Really Need to Be?
• A self-consistent model for estimating the critical current of superconducting devices
• Potential and limits of numerical modelling for supporting the development of HTS devices
• DC and AC Characterization of Pancake Coils Made from Roebel-Assembled Coated Conductor Cable