Characteristics of the a.c. losses in Ag-sheathed PbBi2223 tapes

Yang, Y.; Beduz, C.

doi:10.1016/s0011-2275(97)00070-2

Cited by 9 publications

(3 citation statements)

References 13 publications

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“…This implies that AC loss in the assemblies can simply be scaled by the macroscopic coil I c . Similarly, scaling AC loss by the overall wire/cable critical current has been reported in single wires and Roebel cables [24,26,29]. Theoretical justification for this scaling is provided by the expression [30], derived from Brandt and Indenbom [31] for total loss in a conductor, valid in the case of field-independent J c :…”

Section: Resultsmentioning

confidence: 74%

“…The measured AC loss per cycle is frequency independent, indicating that the loss is hysteretic. The transport AC loss in the low current region deviates from the Norris ellipse calculation, which might be attributed to the spatial variation of local J c [26]. The current dependence shown in figure 8(a) is consistent with a shell of higher J c material and a core of lower J c material within the elliptical envelope of coupled filaments typical of a BSCCO powder-in-tube conductor.…”

Section: Measurement Methodsmentioning

confidence: 70%

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AC loss measurements in HTS coil assemblies with hybrid coil structures

Jiang

Long

Staines

et al. 2016

Supercond. Sci. Technol.

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Both AC loss and wire cost in coil windings are critical factors for HTS AC machinery applications. We present AC loss measurement results in three HTS coil assemblies at 77 K and 65 K which have hybrid coil structure comprising one central winding (CW) and two end windings (EWs) wound with ReBCO and BSCCO wires with different self-field Ic values at 77 K. All AC loss results in the coil assemblies are hysteretic and the normalized AC losses in the coil assemblies at different temperatures can be scaled with the Ic value of the coil assemblies. The normalised results show that AC loss in a coil assembly with BSCCO CW can be reduced by using EWs wound with high Ic ReBCO wires, whilst further AC loss reduction can be achieved by replacing the BSCCO CW with ReBCO CW. The results imply a flexible hybrid coil structure is possible which considers both AC loss and wire cost in coil assemblies.

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