Resistive barriers - electric decoupling

1
Resistive barriers - electric decoupling
For ac self field application induced by
transport current the use of the electric
barriers may appeared to be detrimental,
especially when the engineering critical current
value is substantially reduced.
Required conductors with small coupling current
decay time constant short twisting pitch length
and high effective interfilament transverse
resistivity t?? lt2/?e
2
Alloyed matrix better but p filament shape more
important
The loss contribution from the eddy current loss
to the total loss is quite small at
50Hz Filaments are more of an elliptical shape
therefore there are higher losses.
85 filaments
twisted
37 filaments
twisted
3
Cable
3 phase Superconducting Cable
American Superconductor
LN2
SIEMENS
Superconductor
Thermal super- insulation
Electric Insulation