Fast algebraic fault diagnosis for the electrolytic filter capacitor of buck converter

This work focuses on fault detection applied to static converters. A new method for estimating parameters of dynamic model of the buck converter is proposed, based on recent algebraic parameters estimators. The diagnosis scheme developed in this paper computes online the filter capacitor aging by determining the equivalent series resistance (ESR). The capacitance and inductance value are also estimated by this method. Finally, the estimators detailed in this study are validated experimentally on a prototype of buck converter.