Simplified Numerical Electromagnetic Field Analysis Method of Coils Wound With Spiral Coated-Conductor Cables

To reduce the computation load for electromagnetic field analyses of magnets wound with spiral coated-conductor cables, we developed a simplified analysis method. In the method, we analyze a single spiral coated-conductor cable carrying transport current under the external magnetic field, which is generated by the current in adjacent spiral coated-conductor cables while ignoring influence of shielding currents in them. We conducted numerical electromagnetic field analyses with and without the model and directly compared the analysis results: magnetization and ac loss density distributions in coated conductors and the temporal evolution of ac losses. The comparison of the analysis results from each analysis model showed the applicability of the analysis method for ac loss estimation of magnets.