2-D Modeling of HTS Coils With $T$-$A$ Formulation: How to Handle Different Coupling Scenarios

Numerical models based on the finite-element method are popular tools for investigating macroscopic electromagnetic behavior of high-temperature superconductor (HTS) applications. This article explains how to use $T$ - notation="LaTeX">$A$ formulation in COMSOL Multiphysics modeling HTS coils 2-D with different coupling scenarios between turns. First we consider a racetrack coil wound from one piece superconducting tape. Then, obtained by winding cable composed tapes. In latter case, tape turns either electrically connected along their entire length or just at two ends coil: model, these types electrical connection implemented help circuit module. The current density distributions and ac losses compared discussed. limits applicability presented approach pointed out. model is developed straight section coils, but can be easily adapted axisymmetric geometries.