Generating Source Field Functions With Limited Support for Edge Finite-Element Eddy Current Analysis

A simple method is presented to generate impressed current vector potential functions with limited support whose curl yields a given net current. They are advantageously used in finite-element eddy current analysis employing a current vector potential represented by edge basis functions. A current vector potential describing a static current field with the given net current in the eddy current domain is first constructed. This source field is nonzero in the entire problem domain. Thereupon, it is restricted to a minimal simply connected region. The method is illustrated by a numerical example.