but in reality it is not
suitable to optimize the machines only for the lowest possible losses. In moving
systems, for example, the weight of the device plays a crucial role and optimization
should take that into account [7,8]. According to current knowledge, by utilizing
HTS windings in power devices it is possible to reduce losses to approximately half
compared to that of the conventional devices [9,10]. The ratio, a, of the losses in the
HTS-device to the losses in the corresponding conventional one can be used to
express the efficiencies of HTS-devices, sc.