Interleaving of parallel DC-DC converters using sliding mode control

This paper introduces a new approach to interleaving parallel power converters using a multi-input sliding-mode control scheme. The control approach is based on sliding surfaces which naturally provide interleaving between cells of a modular power supply system. Moreover, the sliding surfaces provide equal current distribution among the power converter modules and a regulated voltage in the output. The technique is also effective if there is a varying number of cells in the system, each as the failure of one or more cells. Simulation and experimental results are presented for a parallel structure based on three buck power converters.