This paper presents a method which resolves the 3-dimensional eddy current field into a 3-D time harmonic field external to the windings and n axisymmetric eddy current fields near the coils as an approximation for engineering applications. Due to the fact that the isoparametric FEM with 3-D vector potential is used in the time harmonic field analysis while in the n axisymmetric eddy current field analysis, B-Spline FEM is used, the method presented here can give a solution with an accuracy quite acceptable for engineering purposes. The distributions of leakage fields, eddy current losses and heat source in the windings obtained check with the test results.
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Electrical and Electronic Engineering