In this paper a modular package, named COMPELL, for the solution of two-variable time-varying problems of the elliptic type is presented. The package allows the solution of standard magnetic problems, also under quasi-stationary or rapidly time-varying conditions, in the cases with nonlinear, anisotropic and nonhomogeneous materials with eddy currents, but can also face different problems, taking into account for instance the presence of moving bodies or the reciprocal interaction between magnetic fields, thermal fields and so on. The procedures used for field solution are generalized finite differences, least square finite differences, first presented in this paper, or finite elements. In the paper examples of magnetic field solutions are given, in particular by showing the field in a Tokamak structure accounting for the Hall effect. The data deck and the obtained results are displayed and the main features of the package are discussed.

A user oriented modular package for the solution of general field problems under time varying conditions

WEMAP (Westinghouse Electric and Magnetic Analysis Program) is a general purpose system for electromagnetic analysis. It is being developed at the Westinghouse Electric Corp. and is currently running on a Prime 450 at the R&D center. The purpose of WEMAP is to provide design engineers with a simple set of tools to evaluate their electromagnetic designs. This paper describes the system and its preprocessor, executive, analysis and postprocessor modules. A nonlinear magnetostatic problem is shown as an example.

WEMAP: A general purpose system for electromagnetic analysis and design

This paper reviews the application of the finite element method in the design of electromagnetic devices. The order of presentation is historical. Available techniques and future trends are discussed in the context of finite element methods based on differential equation formulations. Examples illustrate the computational techniques from the perspective of designers of electromagnetic devices.

Electromagnetic devices and the application of computational techniques in their design

This paper describes a program for the solution of boundary-value problems of the elliptic type by means of the finite-element method and a generalized finite-difference method developed by the authors. The program is oriented toward the reduction of input operations to those strictly needed to define a given problem physically, and it has been designed to allow automatic grid optimization. The generalized finite-difference method can handle completely irregular grids, and allows the discretization of any form of second-order elliptic equation under general boundary and interface conditions. To show the potentiality of the method, an example of magnetic field problem with sharp boundary, non-homogeneous anisotropic material and non-uniform current density distribution is presented, and the results are compared with the theoretical solution. Finally, the results obtained and the potentiality of the program are discussed.

A multi-purpose modular program for the numerical solution of electromagnetic boundary-value problems

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A multi-purpose modular program for the numerical solution of electromagnetic boundary-value problems