Abstract
This paper presents a generalized 2-D tensor finite element model, which can be used to evaluate force components in electromagnetic devices including those due to the magnetostrictive phenomenon. Magnetostriction is a property of ferrous alloys in which the material will exhibit strain in the presence of a magnetic field. This strain is in addition to any other strains that might exist as a result of electrical and for mechanical forces in a given application. At low frequencies, magnetostrictive forces are undesirable. They can be large and generate acoustic noise in electromagnetic systems, which can be undesirable in some applications. Implementation results on a 2-hp, permanent magnet motor indicate that magnetostrictive forces are significant and amount to more than 50% force level increase above electromechanical force levels obtained without accounting for magnetostriction.
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