On the use of the new edge based A/spl I.oarr/-A/spl I.oarr/, T/spl I.oarr/ formulation for the calculation of time-harmonic, stationary and transient eddy current field problems

Abstract

Most papers concerning the calculation of 3D eddy current problems are using a combination of a vector potential and a scalar potential to solve the electromagnetic field in the eddy current regions. This paper uses the A/spl I.oarr/-A/spl I.oarr/, T/spl I.oarr/ formulation with both the magnetic vector potential A/spl I.oarr/ and the electric vector potential T/spl I.oarr/ in the eddy current regions. Since nodal vector potentials with continuous normal components have accuracy problems at interfaces of regions with different permeabilities, edge elements can be used for both potentials. The formulation is applied to the calculation of stationary eddy current field problems induced by motion, time-harmonic and transient eddy current field problems.