Error Correction of Electromagnetic Force Calculation Using Nodal Force Method in Time Domain Eddy Current Analysis

Accurate estimations of electromagnetic (EM) force is indispensable for evaluating the dynamics of the electrical machines. When the finite element method is applied to the EM field analysis, some numerical force calculation methods are used such as nodal force method. The calculation accuracy of the EM force is dependent on the several factors, namely, the magnitude of EM force, the resolution of the finite element mesh, distribution of the finite elements and so on. Recently, the authors proposed a method to improve the calculation accuracy of that using the error correction in the magnetostatic field. In this paper, the error correction method is extended to the force calculation in transient eddy current analysis.