Equivalent Surface Sources Gain the Second Order Vector Potential Formulation

Summary from only given, as follows. Often the true strength of a field formulation is found in the efficiency and accuracy of its post processing capability. Any method of replacing derivatives with integrals is desirable numerically. The method outlined here is especially advantageous with eddy current problem, because it allows the interfaces of all conducting regions to be replaced with equivalent magnetic surface charge and surface current. These equivalent sources are an immediate result of the field computation, and require virtually no additional computation. In terms of theme equivalent sources, external fields are found quite accurately from surface integrations. With boundary element method (BEN) techniques, this ability is especially valuable in terms of its accuracy and speed in finding global quantities such as force. The equivalent sources are directly related to the second order vector potential which has separability advantages in a number of coordinate systems.