A New Method for Estimating Permanent Magnet Synchronous Machine Parameters

This paper presents a new method for estimating equivalent circuit parameters of a permanent magnet synchronous machine. Previous methods for finding equivalent circuit parameters are based on magnetostatic finite element analysis. Magnetostatic finite element analysis doesn’t consider operation frequency. At higher frequencies machine parameters might vary due to skin effect contribution. The new method is based on transient finite element analysis. Therefore it can take operation frequency into account. The new method needs four finite element transient analysis; one no load analysis and three loading analysis. Test results are gathered in a set of three non-linear equations. By solving this set of three equations, equivalent circuit parameters of the permanent magnet synchronous machine will be found. A typical solid rotor permanent magnet machine is chosen for case study. It is shown the proposed method is simple and accurate.