High-Tc superconductors and AC loss in electrotechnical devices


Ries, Günter and Leghissa, Martino and Rieger, Jürgen and Wiezorek, Jan and Oomen, Marijn (1998) High-Tc superconductors and AC loss in electrotechnical devices. Physica C: Superconductivity, 310 (1-4). pp. 283-290. ISSN 0921-4534

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Abstract:To replace conventional normal conducting solutions in electrotechnical devices, high-Tc superconductors must offer distinct economical and technical benefits in terms of lower overall loss, volume and weight. Based on AC loss theory we design appropriate 50 Hz reference conductors for cables, transformers and other applications, calculate admissible limits for the conductor variables filament diameter, twist and matrix resistance and compare this to the present state of Bi-2223-tape conductors and AC loss measurements. Further the influence of perpendicular AC field components on losses is addressed. High current devices will require multistrand conductors, where nonuniform current distribution due to unbalanced magnetic coupling may result in partial saturation and enhanced losses. As an example we discuss the multilayer HTSC-cable and present a solution based on a ‘zero flux condition' for azimuthal and axial magnetic fields.
Item Type:Article
Copyright:© 1998 Elsevier
Electrical Engineering, Mathematics and Computer Science (EEMCS)
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Link to this item:http://purl.utwente.nl/publications/73914
Official URL:https://doi.org/10.1016/S0921-4534(98)00477-8
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