Characterisation and Modelling of HTS Coils
Recent efforts on manufacturing high temperature superconductors (HTS) have resulted in the production of coils which promise significant benefits for power engineering applications. Losses in two HTS pancake coils carrying AC current are measured and the results are analysed. It is shown that a thin pancake coil with relatively large diameter can be treated as straight tapes arranged in a face-to-face stack with the spacing between the tapes chosen to be relatively small. Losses in the tapes become those predicted using Norris's equation for an infinite slab.