Abstract
Current and flux densities in electric conductors exposed to alternating magnetic fields redistribute as a consequence of Faraday’s law. This fundamental observation has numerous occurrences in electric machines (skin and proximity effect), most of which lead to increase of losses. Analytical and numerical tools are developed in this chapter, which help one to quantify AC losses and design a machine in such a manner as to minimize them. Among these are a method for evaluation of AC parameters of a bar with arbitrary cross section and the analytical tool for computation of proximity effect in a conductor in slot. Various procedures for minimization of AC losses are discussed. Computational procedures are discussed for evaluation of skin effect in ferromagnetic media, thin plates, etc.
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