DocumentCode :
1758094
Title :
Modeling and Measurements on a Finite Rectangular Conducting Plate in an Eddy Current Damper
Author :
Pluk, K.J.W. ; van Beek, T.A. ; Jansen, J.W. ; Lomonova, E.A.
Author_Institution :
Dept. of Electr. Eng., Eindhoven Univ. of Technol., Eindhoven, Netherlands
Volume :
61
Issue :
8
fYear :
2014
fDate :
Aug. 2014
Firstpage :
4061
Lastpage :
4072
Abstract :
This paper concerns the modeling of an eddy current damper with a finite conducting plate. In the eddy current damper, a finite rectangular conducting plate is moving between cuboidal magnets. The first step of the modeling method is based on an infinite conducting plate. For this infinite conducting plate, the eddy current density is derived using two different methods, the scalar potential method and the vector potential method. The finite boundaries of the conducting plate are included by means of the method of images in two dimensions and, therewith, complete the model. By applying the method of images, the accuracy of the models for calculating the damping coefficient is significantly improved. The assumption of an infinite conducting plate gives less than 15% error for a conducting plate with at least twice the dimensions of the permanent magnet. Applying the method of images reduces the modeling error for a conducting plate with two times the permanent-magnet dimensions to less than 3% in respect to a finite-element model. For the verification of the semianalytical model, measurements are performed. For a variation of the plate width, the presented semianalytical model has less than 5% discrepancy with respect to the measurements.
Keywords :
conducting bodies; eddy currents; electric current control; finite element analysis; cuboidal magnets; eddy current damper; eddy current density; finite rectangular conducting plate; finite-element model; infinite conducting plate; permanent magnet; scalar potential method; vector potential method; Damping; Eddy currents; Magnetic domains; Magnetic resonance imaging; Magnetomechanical effects; Permanent magnets; Vectors; Eddy current damping; eddy currents; electromagnetic forces; electromagnetic modeling; finite-element method (FEM); magnetic devices; method of images; permanent magnets;
fLanguage :
English
Journal_Title :
Industrial Electronics, IEEE Transactions on
Publisher :
ieee
ISSN :
0278-0046
Type :
jour
DOI :
10.1109/TIE.2013.2279364
Filename :
6584775
Link To Document :
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