Experimental evaluation of PI tuning techniques for field oriented control of permanent magnet synchronous motors

Abstract

This paper presents the experimental evaluation of a commonly used methodology to tune the PI regulators of the Field Oriented Control (FOC) strategy for Permanent Magnet Synchronous Motors (PMSMs). The methodology used is based on the Absolute Value Optimum (AVO) and Symmetric Optimum (SO) criterions. These methods employ a simplified model of the plant to be controlled. Due to the complexity and non-linearities present in the FOC PMSM drive some divergence between the ideal response and the real results will occur. In this paper a comparison between simulated and experimental results is carried out to evaluate the goodness of the solution obtained. The divergences observed between simulations and the results obtained in the experimental setup are shown and it is attempted to justify the causes of them. Overall it is concluded that the method provides a satisfactory initial commissioning of the PI regulators for the drive system under study.