HTS electrical machines with YBCO bulk and Ag-BSCCO plate-shape HTS elements: Recent results and future development

Novel types of electric HTS motors with the rotor containing bulk YBCO elem ents are presented. Different schematics of hysteresis, reluctance "trapped field" and composed I-ITS motors are discussed. The two-dimensional mathem atical models describing the processes in such types of HTS machines were d eveloped on the basis of the theoretical analysis of the electrodynamic and hysteresis processes in the multi-domain and single-domain YBCO ceramic sa mples. The test results of the series of these I-ITS motors with output Few er 1-20 kW and current frequency 50 and 300 Hz are given. These results sho w that in the media of liquid nitrogen the specific output power per one we ight unit is four to five times better then for conventional electric machi nes. The design of a new high power I-ITS motor operating in the liquid nit rogen with output power 200 kW (and more) is discussed. Future applications of new types of I-ITS motors for airspace and on-land industry and transpo rt systems are discussed. (C) 2001 Published by Elsevier Science B.V.