New Types of Electric Machines on the Basis of the Bulk HTS Elements: Recent Results and Future Development

摘要

Novel types of electric HTS motors with the rotor containing bulk YBCO elements are presented. Different schematics of hysteresis, reluctance "trapped field" and composed HTS motors are discussed. The two-dimensional mathematical models describing the processes in such types of HTS machines were developed on the basis of the theoretical analysis of the electrodynamic and hysteresis processes in the multi-domain and single-domain YBCO ceramic samples. The test results of the series of these HTS motors with output power l-20k W and current frequency 50 Hz and 400 Hz are given. These results show that in the media of liquid nitrogen the specific output power per one weight unit is 4-5 time better then for conventional electric machines. The design of a new high power HTS motor operating in the liquid nitrogen with output power 200 kW (and more) is discussed. Future applications of new types of HTS motors for airspace and on-land industry and transport systems are discussed.