NDLI: Numerical Simulations of vector field distributions generated by circular permanent-magnet arrays with side-openings

Content Provider	IEEE Xplore Digital Library
Author	Xu, X.N. Lu, D.W. Yuan, G.Q. Jin, X.
Copyright Year	1965
Abstract	In the rotary-magnetic refrigerator, a circular permanent-magnet array with side-openings (CPMAS) provides a magnetic field exceeding the remanence of each magnet. Here we show that the magnetic induction in the pole gap as well as inside the magnets of a CPMAS can be calculated using an analytical vectorial formula. The method is based on the representation of the field of a uniformly magnetized magnet by straight current-carrying wires on the surface of the magnet. The Biot-Savart law gives the vector field of a single wire of arbitrary orientation, position, and length; the sum of fields from each wire gives the total field. The magnetization hysteresis loop of the permanent magnet is included by varying the current density; this is then used to calculate modifications to the center field by demagnetization, including remanence inversion under the field generated by the CPMAS itself. The field analysis procedure described here can be used to optimize the structure of permanent-magnet arrays, especially for three-dimensional arrays of restricted or asymmetric geometry, for various applications.
Sponsorship	IEEE Magnetics Society
Starting Page	1512
Ending Page	1517
Page Count	6
File Size	410665
File Format	PDF
ISSN	00189464
Volume Number	42
Issue Number	5
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-05-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Numerical simulation Remanence Magnetic analysis Wire Induction generators Refrigeration Magnetic fields Magnetization Magnetic hysteresis Permanent magnets width of side-opening Circular permanent-magnet array field simulation magnetization hysteresis loop
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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