Sensorless static model design of digital DC-DC converter for various input voltage conditions

Abstract

A model control and a filter suppressing oscillation of the output voltage that can obtain the stable output voltage of a dc-dc converter have been proposed previous. Although there is a problem that the condition on the input side of dc-dc converter is changed when it connects the load equipment to renewable energy generators through the DC bus, since the renewable energy generators are sometimes unstable due to the weather changes. Dc-dc converters are affected by such fluctuation of the DC bus voltage as an input voltage. In this paper, the design to stabilize the output voltage of the sensorless static model including the filter when the input voltage is varied is studied. The validity of the design is verified by simulation.