Boost converter load estimation by a sliding mode approach

The control system for a boost converter with load uncertainties has been considered. A discontinuous boost converter model is considered taking into account also the inductor parasitic resistance and the diode threshold voltage. Exploiting the dynamics, internal and external, of the converter, a sliding mode regulator of the voltage has been designed by a change of coordinates. The load has been estimated by a sliding mode observer. The proposed solution has been numerically tested using a powerful software simulation platform.