AC Losses in Noninductive SFCL Solenoidal Coils Wound by Parallel Conductors

AC losses in coated conductors

Future use of coated conductors in electric power applications like transmission cables, transformers or fault current limiters is sensitive to the amount of dissipation in the AC regime. This paper analyses factors controlling AC loss of coated conductors in typical configurations: the self-field case when transport current generates the magnetic field, and the case of AC applied field where t...

Significant reduction of AC losses in YBCO patterned coated conductors with transposed filaments

We report on a first implementation of a design which provides a significant reduction of AC losses in YB2Cu3O7−δ (YBCO) coated conductors (CCs) without mechanical twisting. The conductor is composed of two diffusively bonded silver clad commercial CCs with zigzag patterned filaments partially separated by a dielectric layer. We produced three fully bonded samples with 500 μm wide filaments usi...

AC-Loss Induced Quenching in Adiabatic Coils Wound with Composite Superconductors Having Different Twist Pitches

The effect of filament twist pitch length on AC-loss induced normal zone propagation in adiabatic coils wound with composite NbTi superconductor was investigated. Two test coils were constructed. They were identical in shape, dimensions, and other parameters, the exception being the conductor's filament twist pitch length. One had a twist pitch length of 10 mm and the other had a twist pitch le...

Current noise in ac-driven nanoscale conductors.

The theory for current fluctuations in ac-driven transport through nanoscale systems is put forward. By use of a generalized, non-Hermitian Floquet theory we derive novel explicit expressions for the time-averaged current and the zero-frequency component of the power spectrum of current fluctuations. A distinct suppression of both the zero-frequency noise and the dc current occurs for suitably ...

Sensitivity and Noise Analysis of Solenoidal Coils for Nuclear Magnetic Resonance Microscopy By