AC loss in MgB2-based fully superconducting electric machines

Electric machines;Motor;Generator;Superconducting;AC loss;MgB2

Feddersen, Matthew T ; Haran ; Kiruba S.

关键词: Electric machines;    Motor;    Generator;    Superconducting;    AC loss;    MgB2;   

Others  :  https://www.ideals.illinois.edu/bitstream/handle/2142/97723/FEDDERSEN-THESIS-2017.pdf?sequence=1&isAllowed=y

美国|英语

来源: The Illinois Digital Environment for Access to Learning and Scholarship

【 摘 要 】

Superconducting electric machines have shown potential for dramatic increases in specific power for applications such as offshore wind generation, turbo-electric distributed propulsion in aircraft, and ship propulsion. Superconductors exhibit zero loss in dc conditions, though ac current produces considerable loss due to hysteresis, eddy currents, and coupling. For this reason, many present designs for such machines are partially superconducting, meaning that the dc field components are superconducting while the ac armature coils are normal copper conductors. A fully superconducting machine would involve both superconducting field and armature components for higher specific power, though this would introduce the previously mentioned ac losses. This research aims to characterize the expected losses in the components of fully superconducting machines based on partially superconducting designs described in prior work. Various factors are examined, such as motor geometry and operating frequency, and two low-loss designs are proposed based on the analysis.