Magnetic field analysis of air-core superconducting transformer

In the applications of the superconducting wires to the AC power field, the magnetic field analysis is very important in order to investigate their power loss and stability. In this paper, a calculation method of magnetic field in the air-core transformer, which is one type of the superconducting transformer, is introduced. Then, based on this method, the magnetic field acting on the transformer winding is analyzed. Results of analysis and that the magnetic field of the air-core superconducting transformer does not distribute uniformly and that the magnetic field under load has a rotating component.