Title :
HTS flux pump for cryogen-free HTS magnets
Author :
Oomen, Marijn P. ; Leghissa, Martino ; Ries, Guenter ; Proelss, Norbert ; Neumueller, Heinz-Werner ; Steinmeyer, Florian ; Vester, Markus ; Davies, Frank
Author_Institution :
Corp. Technol., Siemens AG, Erlangen, Germany
fDate :
6/1/2005 12:00:00 AM
Abstract :
A reliable method for persistent-current mode operation of HTS magnets is still not available. As an alternative solution to external high-current power supplies we have developed a cryogen-free operating transformer-rectifier type HTS flux pump. Using this device only small ac currents have to be supplied into the cryogenic system. Both thermally triggered HTS thin film switches as well as cryogenic MOSFET switches have been used to operate a conduction-cooled 0.5 T HTS magnet coil. This paper presents results of experimental test and modeling of the flux pump operation.
Keywords :
cryopumping; high-temperature superconductors; magnetic flux; persistent currents; power supplies to apparatus; superconducting magnets; superconducting switches; 0.5 T; HTS flux pump; HTS magnet coil; HTS thin film switch; ac current; cryogen-free HTS magnet; cryogenic MOSFET switch; cryogenic electronics; high-current power supply; high-temperature superconductor; persistent current mode operation; superconducting magnet; transformer rectifier pump; Cryogenics; High temperature superconductors; MOSFET circuits; Magnetic switching; Magnets; Power supplies; Power system reliability; Switches; Thermal conductivity; Transistors; Cryogenic electronics; high-temperature superconductors; power supplies; superconducting magnets;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2005.849129
