COMPUTATION OF STATIC AND QUASISTATIC ELECTROMAGNETIC FIELD USING ASYMPTOTIC BOUNDARY CONDITIONS

Abstract

This paper presents the computation of static and quasistatic electromagnetic fields using asymptotic boundary conditions (ABC). Asymptotic boundary conditions for eddy current problems due to external field excitations are derived. For electrostatic fields, ABC-s are used in conjunction with Laplace's equation while for quasistatic magnetic fields, ABC-s are employed in conjunction with the integrodifferential finit element method. The effect of outer boundary locations on the accuracy of the simulation results is examined. This study shows that in these cases, ABC-s can improve the computation accuracy compared to the usual truncation of outer boundaries. [Vol. 9, No. 2 (1994), Special Issue on The Numerical Computation of Low Frequency Electromagnetic Fields, pp 37-42]