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1. (WO2018106935) AXISYMMETRIC ELECTROPERMANENT MAGNETS

Pub. No.:    WO/2018/106935    International Application No.:    PCT/US2017/065145
Publication Date: Fri Jun 15 01:59:59 CEST 2018 International Filing Date: Fri Dec 08 00:59:59 CET 2017
IPC: H01F 7/02
Applicants: UNIVERSITY OF FLORIDA RESEARCH FOUNDATION, INCORPORATED
Inventors: ARNOLD, David, P.
VELEZ CUERVO, Camilo
Title: AXISYMMETRIC ELECTROPERMANENT MAGNETS
Abstract:
Embodiments of the subject invention relate to an electropermanent magnet core (EPM core) having two permanent magnets (or two permanent magnet portions where each portion can have one or more permanent magnets), including a fixed permanent magnet portion and a switching permanent magnet portion, where a switching magnetic field is used to switch the magnetization of the switching permanent magnet portion, but not switch the magnetization of the fixed permanent magnet portion. In this way, the fixed permanent magnet portion has a fixed magnetization, such that the direction of magnetization of the fixed permanent magnet portion remains the same during switching of the magnetization of the switching permanent magnet portion, given the magnitude and duration of the switching magnetic field used to switch the magnetization of the switching permanent magnet portion, and the switching permanent magnet portion has a switching magnetization, such that the direction of magnetization of the switching permanent magnet portion is switched during switching of the magnetization of the switching permanent magnet portion, given the magnitude and duration of the switching magnetic field used to switch the magnetization of the switching permanent magnet portion.