INVESTIGATION OF EFFECTIVENESS OF VARIOUS METHODS WITH DIFFERENT UNKNOWN VARIABLES FOR 3-D EDDY-CURRENT ANALYSIS

Computer codes using the A-Φ, A-Φ-Ω , A*-Φ, T-Ω and E-Ω methods were developed. The characteristics of these methods depend on the object to be analyzed. In this paper, the effects of the volume ratio of the conductor region to the whole region, the shape of conductor and the ratio of the hole region to the conductor region on the computer storage, the CPU time and the accuracy are investigated systematically using a few simple models. The effect of the conductivity of conductor is also examined. Features of various methods have been illustrated by this research. For example, the computer storage and the CPU time are affected by the number of nodes on the boundaries of the conductor, on which some components of unknown variables are given. The reasons having such features have also been discussed quantitatively. © 1990, IEEE. All rights reserved.