DocumentCode :
1574110
Title :
In-situ magnetization of isotropic permanent magnets
Author :
Campbell, P. ; Miller, David ; Zhilichev, Yuriy
Author_Institution :
Magnequench Inc., Research Triangle Park, NC, USA
fYear :
2002
Abstract :
Summary form only given. Proper magnetization of isotropic permanent magnets is key for their application in motors and other devices. To simplify assembly, it is often preferable to pulse magnetize "in-situ" in a fully or partially assembled device. The magnetization in isotropic magnets is determined only by the resulting field, being the sum of three components: field from the magnetizing coils, reaction field from eddy-currents in conductive fixture and assembly components, and demagnetization field in the magnet itself. Accurate analysis of pulse magnetization is a complex nonlinear problem, in which determination of transient magnetic field is coupled with pulse current in the discharge electrical circuit. A specialized magnetization solver accounting for hysteresis, eddy currents and field-circuit coupling has been developed and validated on designs of several magnetizing fixtures for isotropic permanent magnets.
Keywords :
eddy current braking; magnetic hysteresis; magnetisation; permanent magnets; assembly components; complex nonlinear problem; conductive fixture; demagnetization field; discharge electrical circuit; eddy-currents; field-circuit coupling; hysteresis; in-situ magnetization; isotropic magnets magnetization; isotropic permanent magnets; motors; pulse current; pulse magnetization; reaction field; transient magnetic field; Assembly; Coils; Coupling circuits; Fixtures; Hysteresis motors; Magnetic devices; Magnetization; Permanent magnet motors; Permanent magnets; Pulse circuits;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Magnetics Conference, 2002. INTERMAG Europe 2002. Digest of Technical Papers. 2002 IEEE International
Conference_Location :
Amsterdam, The Netherlands
Print_ISBN :
0-7803-7365-0
Type :
conf
DOI :
10.1109/INTMAG.2002.1001359
Filename :
1001359
Link To Document :
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