Many transformers using low Tc or high Tc superconductors have been built a
nd tested, but it is still not clear how to design the volt/turn ratio prop
erly. This paper shows one design method, which minimizes total cost includ
ing initial cost and running cost. According to the results, the optimized
volt/turn will be around 1 volts, which is considerably lower than the volt
/turn ratio of a conventional transformer of 10 to 20 volts.