Finite element computer programs in design of electromagnetic devices

The finite element method, as applied to two-dimensional, nonlinear magnetic field problems, is implemented by an interactive computer system. The input/output features of the system are designed to facilitate its integration into any particular design process through a conversational language. A new approach to force calculation is presented together with reactance expressions in terms of finite element matrix notations. Application of the new system to the study of the force-stroke characteristics of an electromagnet is presented together with experimental results for comparison.