EMSolution is a general-purpose three-dimensional finite　element analysis software for analyzing magnetic fields, eddy currents, and electromagnetic forces in electrical equipment. ^[1] In recent years, improvements in computer functionality and performance have made it possible to perform large-scale analysis at high speed in the field of electromagnetic field analysis, contributing to higher performance of electrical equipment. EMSolution was among the first to develop and introduce advanced analysis technologies such as the edge element method, the ICCG method, the nodal force method, and the sliding method to meet the advanced analysis requirements of our customers. EMSolution has made large-scale, high-precision analysis a reality by reducing computation capacity and increasing computation speed. EMSolution has been widely used in electromagnetic field analysis for nuclear fusion devices, linear motor cars, generators, motors, transformers and high-power transmission equipment, in the large scale, and micro motors and magnetic heads in the small scale.

In this article, we first describe the main features of EMSolution functions and analysis methods.
Next, the significance and problems of the main analysis methods used will be discussed in relation to the EMSolution development. Particular emphasis will be placed on the topics of edge elements and the ICCG method.