Experimental designs for the tuning of a redundant position observer on a PMSM drive

This paper presents an application of the experimental designs method to a PMSM drive control without mechanical sensors. The position, velocity and back emf observer used is a redundant observer structure. This observer includes different gains and filters that have to be tuned optimally for the best convergence performances. All combinations of different values for gains and bandwidths can not be tested and there is no formulation easy to use to define how to fix it. The proposed method is based on the analysis of parameters influence on a defined performance criterion. The most influent parameter and their optimal levels are identified. The set of parameters finally obtained shows the best performances never tested that means: the most accurate current control, the smallest position estimation error