Title :
High-temperature-superconducting machines- a high-technology step for large rotating electric machines
Author :
Frauenhofer, J. ; Kaufhold, M. ; Kummeth, P. ; Nerowski, G. ; Nick, W.
Author_Institution :
Siemens AG, Nuremberg
Abstract :
The presently available high temperature superconducting materials (HTS) transport electric current at high current densities with negligible electric losses. This makes it possible to create higher magnetic fields. Using these features in a rotating electric machine it is possible to reduce the over-all dimensions and weight of the machine, to increase the efficiency and to improve additional features of the machine. To address these goals Siemens started three R&D projects to develop, manufacture and test electric machines with high temperature superconducting field windings. A 400 RW synchronous motor was followed up by a 4000 kVA high speed generator. A 4000 kW high-torque motor will be the third step. Additional to the application in electric machines it is possible to use the substantial advantages of high temperature superconducting materials for passive magnetic bearings. These are operating without any control device of the magnetic field. Siemens started the development of heavy load HTS bearings in parallel to the development of HTS machines
Keywords :
high-temperature superconductors; superconducting machines; 4000 kVA; Siemens; current densities; high-temperature-superconducting machines; high-torque motor; large rotating electric machines; passive magnetic bearings; synchronous motor; transport electric current; Current density; Electric machines; High temperature superconductors; Machine windings; Magnetic fields; Manufacturing; Superconducting materials; Synchronous generators; Synchronous motors; Testing;
Conference_Titel :
Power Electronics, Electrical Drives, Automation and Motion, 2006. SPEEDAM 2006. International Symposium on
Conference_Location :
Taormina
Print_ISBN :
1-4244-0193-3
DOI :
10.1109/SPEEDAM.2006.1649802
