Output voltage regulation of a high-efficiency high step-up DC-DC power converter

Abstract

Step-up dc-dc power converters are needed in many applications. Depending on the voltage conversion ratio, one or another structure should be chosen, usually leading to efficiency vs. conversion ratio trade-offs. Recently, a new class of switchmode dc-dc power converters has been introduced into the literature. These new converters show high efficiency levels at high conversion ratios, making them attractive to applications where efficiency is a major concern. Due to the complexity of the structure, mathematical models of the system have not been developed up to now, making the closed-loop control of these devices a challenging task. In this paper, an output voltage regulation control scheme is proposed and tested in simulation. The system is decomposed in subsystems, whose models are identified within the different control stages.