Abstract ▼ AI-Helper

The various electromagnetic force calculation for the electro-mechanical system that consisted for the magnetic material have been studied to deal with mechanical problem. Total force that calculated by all methods has good agreement, however, force density was different in each method, especially t...

The various electromagnetic force calculation for the electro-mechanical system that consisted for the magnetic material have been studied to deal with mechanical problem. Total force that calculated by all methods has good agreement, however, force density was different in each method, especially the Maxwell stress tensor. Generally, the Maxwell stress tensor is based on the surface force density. Compared with volume force density, it has different force density and deformation. First, FEM was used to compare difference of the Maxwell stress tensor and any volume force density methods. Secondly, the virtual air gap, which can modify surface force density as volume force density, was applied to Korteweg-Helmholtz and several methods to compare each other in some cases. It shows that force density and deformation that obtained by all modified methods have the same results. As a result, this paper insists that surface force density is different with body force density in several cases and the Korteweg-Helmholtz method with the virtual air gap is characterized as volume force density.

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