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Integral formulation for 3D eddy-current computation using edge elements

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2 Author(s)
Albanese, R. ; Istituto di Ingegneria Elettronica, Salerno Univ., Italy ; Rubinacci, G.

An integral formulation for eddy-current problems in nonmagnetic structures is presented. The solenoidality of the current density is assured by introducing a current vector potential T. This potential possesses only two scalar components, as the gauge chosen to ensure its uniqueness is T·u=0, where u is a prescribed vector field. The discrete analogue of this gauge and the boundary conditions are directly imposed by the shape functions, exploiting the use of edge finite elements and the methods of network theory. This approach seems the most adequate to analyse the eddy currents induced in both massive conductors and thin shells. In massive structures, the two degrees of freedom are to be compared to four of the usual integral methods which exploit the presence of a scalar potential to ensure solenoidality. The procedure naturally reduces to the stream function approach when applied to thin shells. An integration procedure which guarantees symmetry and positive-definiteness of the inductance matrix is proposed

Published in:

Physical Science, Measurement and Instrumentation, Management and Education - Reviews, IEE Proceedings A  (Volume:135 ,  Issue: 7 )

Date of Publication:

Sep 1988

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