Experimental Study of the Electromagnetic Forces of a HTS Bulk Magnet Subjected to Sinusoidal Traveling Magnetic Field

• Published in: IEEE transactions on applied superconductivity Vol. 20; no. 3; pp. 929 - 932
• Main Authors: Li, Jing, Wang, Suyu, Wang, Jiasu, Yen, Fei, Liu, Lu, Zheng, Jun, Liu, Wei, lin, Qunxu
• Format: Journal Article Conference Proceeding
• Language: English
• Published: New York, NY IEEE 01.06.2010; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: AC magnetic field; AC motors; Applied sciences; Bulk sampling; Current measurement; Electrical engineering. Electrical power engineering; Electrical machines; Electromagnetic forces; electromagnetic forces superconducting magnet; Electromagnets; Exact sciences and technology; Feasibility; Force measurement; Frequency measurement; High temperature superconductors; Linear machines; Magnetic field measurement; Magnetic fields; Miscellaneous; Motors; Permanent magnet motors; Permanent magnets; Superconducting magnets; Superconductivity; Thrust; Various equipment and components; Performance evaluation; Magnetic flux; Alternating field; AC magnetic field; electromagnetic forces superconducting magnet; Electromagnetic force; Experimental study; Superconducting magnet; Relaxation; Feasibility; Linear motor; Electric motor; Permanent magnet; Magnetic field; Comparative study; High temperature superconductor
• ISSN: 1051-8223; 1558-2515
• DOI: 10.1109/TASC.2010.2041539

High temperature superconducting (HTS) bulk sample acts as quasi-permanent magnet when it traps magnetic field, and the superconducting bulk magnet can substitute the traditional permanent magnet in the engineering of the linear motor for the purpose of achieving higher efficiency. The electromagnetic forces between the HTS bulk magnets and the ac magnetic field are the most important parameters to consider for the engineering of a motor. We measured the static vertical and thrust forces of an HTS magnet subject to a sinusoidal traveling magnetic field at different trapped fields and at different current amplitude and frequencies. The force relaxation of the HTS bulk magnet was also compared with that of a traditional permanent magnet. The feasibility of replacing the conventional magnet in the ac application machines by HTS bulk ones was preliminary validated experimentally.