Improvement of superconducting cylindrical linear induction motor

We have constructed a model Superconducting Cylindrical (Tubular) Linear In duction Motor (SCLIM) to clarify the behaviors (AC loss, stability and so o n) of AC superconducting windings in a realistic operational environment of electrical rotating machines. The studies of an AC superconductor's develo pment in regard to the reduction of AC loss and the improvement of current capacity have been advanced From now on, the valuation of characteristic of AC superconducting windings in a realistic operational environment should be investigated. In the previous paper we presented the design and construc tion of SCLIM model system composed of AC superconducting primary windings, FRP cryostat and VVVF power supply with quench detection and protection ci rcuit, and the results of fundamental driving experiments. In this paper, w e optimize the current distribution in primary windings to enhance the thru st characteristics and the quench detection and protection system for AC su perconducting machines by a numerical approach based on the developed FEM c omputer program. The measurements of the thrust force, the distributions of the magnetic flux density and primary current in the SCLIM model are also shown.