The Specific Features of Modeling the Electrical and Magnetic Skin Effects from Alternating Electromagnetic Fields Using the FEMM Computer Program
Abstract
The electromagnetic field theory still remains among of the most difficult sections of electrical engineering that are studied by the students of relevant universities. Computer modeling is a modern tool that helps master this section in a more efficient way. This is especially important in view of the trend toward increasing the role of independent work assigned to students in the modern educational programs. However, even quite advanced computer modeling tools still contain some hidden features. The article addresses the problem of overcoming the difficulties encountered in using the FEMM computer program for modeling alternating electromagnetic fields. It has been found that the way in which the FEMM computer
program models the influence of the electrical skin effect in alternating current conductors is incorrect. At the same time, the FEMM computer program models the influence of the magnetic skin effect in billets free from extraneous currents placed in the magnetic field of an inductor at a specified frequency is a correct way. Examples of field models for the considered cases are given.
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