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Subproject: Numeric Modelling of AC-Losses

Research project context: »WP3 New concepts for low ac-loss coated conductors«

Numeric modelling of ac-losses  

Abstract: In the last decade, numerical modelling techniques have become a necessary complement to the experimental characterization of HTS. They represent a fast and reliable method used in R&D of new HTS conductors and devices for precise calculations of the AC losses, magnetic flux and current density distributions inside superconductors with complex geometry, for which theoretical solutions are not available.

  WP3 New concepts for low ac-loss coated conductors
 
 
  Research Project Information     Subproject Information
Runtime: Since 2006-10-22
Project coordination: Dr. Feor Gömöry
 
Project runtime: Since 2006-10-23
Scientific coordination: Dr. Giovanni Grasso

Numerical techniques are especially useful for AC applications and for studying the AC regime of superconducting devices, such as HTS cables and transformers. Such modelling will be done in a close cooperation by IEE and Columbus and will be compared with the measurements of ac-losses done in KT3.2. At IEE mainly two advanced numerical methods for two-dimensional simulation of the magnetic flux penetration into single-core as well as composite tapes will be used: The minimal magnetic energy variation (MMEV) method enables to visualise the magnetic flux fronts in geometries reproducing the cross-sections of commonly utilised composite superconductors. This will be complemented by the numerical simulations using the Brandt’s method, which is particularly suitable for the description of superconductors at liquid nitrogen temperature, when the thermal activation of magnetic flux quanta is considerable.