Induction machine finite element model for field-oriented control in Electric vehicle power train

Vector controlled drives involve a prior knowledge of the spatial orientation as well as the magnitude of the magnetic flux in the IM rotor or stator. In this context estimators or observers can be used, depending on the required robustness and accuracy as well as the sensitivity next to parameters variation. Thus, the performance of an IM drive remains dependent on the rapidity and the accuracy of the submitted parameters values. In this paper an IM finite element model based observer “FEMO” is developed. The IM finite element model “IMFEM” was designed using a two dimensional Finite Element Method “FEM” in order to identify the stator inductance, the rotor time constant and the magnetic dispersion coefficient. Field trials was undertaken to validate the IMFEM and performance of the FEMO is evaluated.