Flux observer for induction machine control. Part II - Robust synthesis and experimental implementation

This paper proposes an approach to determine the gain of closed loop flux o bserver for an induction machine with respect to robustness and stability c riteria. In the companion paper, a sensitivity analysis of flux observer ha s pointed out the influence of the sampling rate and the parameters mismatc h. From this study, an accurate observer can be deduced. The analytical res ults are checked experimentally, in steady state and during transients. For that aim, an experimental rig has been installed. This paper deals also wi th a new description of the induction machine drive thanks to Causal Inform ational Graph. This description is useful for the simulation and for the im plementation of the experimental rig.