Load current feedforward control of boost converter for downsizing output filter capacitor

Boost converters are used for high voltage supplying, and they generally have to use large capacitors to suppress output voltage variations. However, this characteristic makes the converter system very large. In this paper, three load current feedforward control methods, which are considered an unstable zero, are proposed for the boost converter. The proposed methods suppress voltage variation compared to feedback control methods and enable the converter to reduce output filter capacitor. Simulations and experiments are conducted to show the effectiveness of the proposed methods.