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Simulation of I-F Starting of PMSM Drive

Sonia Thomas, Dominic Mathew

This paper proposes a new I-f starting method based on closed-loop current regulation for sensor less back EMF based FOC of PMSM drive. A new transition process is introduced before switching from the start up strategy to the sensor less FOC strategy. This transition period ensures a smooth switching from starting to back -EMFbased sensor less FOC algorithm. The method proposed in this paper is simple and can work with different load situations. The performance of this start up process is also robust under different motor parameter variations.Detailed analysis of I-F starting is given.The new start up method is validated using simulation results done in MATLAB/Simulink on a 480V, 2850rpm PMSM motor