Title :
Unified theory of superconducting and PM synchronous machines
Author :
Miller, T.J.E. ; McGilp, M.I.
Author_Institution :
SPEED Lab., Univ. of Glasgow, Glasgow, UK
Abstract :
It is shown that the electromagnetic theory of the superconducting AC machine is very close to that of the surface-magnet permanent-magnet synchronous machine. Methods for calculating the EMF and synchronous inductances are practically identical and almost interchangeable. It is not only possible to use related algorithms for design calculations, but the results are readily compared in a form convenient for studies, especially of very large machines. The theory includes not only the steady state but also the subtransient state following a short-circuit fault. Methods for analyzing the demagnetization of permanent magnets, or the quenching of the superconducting winding, are closely related. The paper describes all the main points of the theory with numerical and graphical illustrations.
Keywords :
electromagnetic field theory; machine theory; permanent magnet machines; short-circuit currents; superconducting machines; synchronous machines; EMF; PM synchronous machines; electromagnetic theory; permanent magnet demagnetization; short-circuit fault; superconducting AC machine; superconducting synchronous machines; superconducting winding quenching; surface-magnet permanent-magnet synchronous machine; synchronous inductance; AC generators; Laboratories; Machine windings; Permanent magnet motors; Permanent magnets; Power generation; Superconducting magnets; Superconductivity; Synchronous machines; Synchronous motors; Superconducting electrical machines; permanent-magnet machines;
Conference_Titel :
Electrical Machines and Systems, 2009. ICEMS 2009. International Conference on
Conference_Location :
Tokyo
Print_ISBN :
978-1-4244-5177-7
Electronic_ISBN :
978-4-88686-067-5
DOI :
10.1109/ICEMS.2009.5382829
