Effects of asymmetry in far fields of permanent magnet motors

Salon, S.J.; Kwon, O-Mun; Sivasubramaniam, K.

doi:10.1109/intmag.2002.1001096

Cited by 4 publications

(2 citation statements)

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“…The scalar magnetic potential generated at the basis boundary by both the magnet and yoke is calculated by the authors at RPI [5] using a full FE (FLUX 3D) model shown in Fig. 3 and the partial FE model (ANSYS) of Fig.…”

Section: Resultsmentioning

confidence: 99%

Spatial harmonic analysis of fem results in magnetostatics

et al. 2003

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Approaches to the spatial harmonic characterization of the field due to a symmetrically shielded permanent bar magnet are presented. At first, exact spherical harmonic coefficients are obtained for a given unshielded magnet and comparisons are made with the coefficients of unshielded numerical models. In the calibration test, the scalar magnetic potential is separately calculated by the integral equation method (IEM) and finite-element method (FEM) with a layer of "infinite" elements on the interface boundary. While the values from the IEM data are nearly exact, the analysis of the FEM data demonstrates greater errors. For the selection of the coefficients from the discrete data from either unshielded or shielded magnets, discrete selective functions are additionally orthonormalized at the boundary surface. For the discrete selective functions generated for the grid of 612 points, which are uniformly distributed over the unit sphere with angular steps of 10 in and directions, the maximal error of nonorthogonality is below 10 8 .Index Terms-Finite-element method, magnetic multipole, magnetostatics, spherical harmonic analysis.

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Section: Resultsmentioning

confidence: 99%

Spatial harmonic analysis of fem results in magnetostatics

et al. 2003

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“…The simplest model of equivalent source which has been proposed is a magnetic dipole (Yamazaki and Kawamoto, 2001;Zaffanella et al, 1997). However, a simple dipole may be not representative enough of the field distribution, depending upon the kind of the appliance (Salomon and O-Mun, 2001), and on the distance from it. In this case, a multipolar source can be used.…”

Section: Introductionmentioning

confidence: 99%

Optimal characterization of LF magnetic field using multipoles

Scorretti

Takahashi²,

Nicolas³

et al. 2004

COMPEL - The International Journal for Computation and Mathematics in Electrical and Electronic Engineering

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