New control strategy for high power DC-DC converters under large load and input voltage variations

DC/DC switching converters have been used in many applications in recent years. The sliding mode control based on VSS (variable structure system) theory has been examined for all switch mode converter types, whilst current mode (CM) control scheme is particularly applied to DC/DC converters. However, these control strategies can´t compensate for large load current and input voltage variations. In this paper, a new control strategy by compromising both schemes advantages and avoiding their drawbacks is proposed, analyzed and simulated; and derivation of a dynamic current reference is also carried out. Moreover, considerations for realization with DSP controllers are addressed