An Alternative to Determine IM Parameters Trends Affected by Magnetic Saturation Using Two-Stage Flux-Decay Test by FEM

In this work, a two-stage flux-decay test is conducted to determine not only the induction machine parameters for a single current level but also their dependence on the current level. The goal of this work is to find an alternative parameter determination to the conventional method, which has several drawbacks when applied to variable speed applications. First, the theory of the T-form model (TFM) and flux-decay test are reviewed. Second, a new alternative determination method for identifying these parameters is presented. Third, a 2D electromagnetic finite element method (FEM) model of a vehicle traction induction machine (IM) is implemented to show the viability of the proposed method in a real design. Lastly, a comparison of results using the conventional method and analyzed the proposed method is presented, showing a good agreement