Multi-input sliding mode control for parallel-connected series resonant converters

A multi-input sliding-mode control scheme for a multi-module parallel power converter system is investigated. The system is based on series resonant power converters operating at resonant frequency and switching at zero resonant current. An averaged circuit model for each module is derived which allows a description of the dynamic behavior of this power converter under large-signal conditions. This model is used for designing a simple multi-input sliding mode controller for a modular power system. Using this control strategy makes the dynamic response of the system correspond to a second-order linear behavior and the asymptotic stability in the global state space can be guaranteed