Finite element assisted method of estimating equivalent circuit parameters for a superconducting synchronous generator with a coreless rotor

The paper outlines methods developed to obtain circuit parameters of a superconducting synchronous generator with a coreless rotor. The need for full three–dimensional (3D) finite element modeling is emphasized and appropriate techniques devised to estimate relevant equivalent characteristics. The methods described use steady-state ac models, predominantly in the rotor frame of reference; the use of transient or full rotating machine models is avoided