Switched control of interleaved converters

Abstract

In this paper, a time varying switching control of interleaved converters is proposed. The controller has the feature of being simple and it is able to guarantee global voltage regulation. The controller is based on the piece-continuous model of the converter and it works by switching between performance surfaces that depends on the state vector. The switching surfaces are chosen differently for each cell of the interleaved converter in order to guarantee, both maximum current and voltage ripple. Furthermore, a given phase between current signals can also be guaranteed. The switched control is illustrated in a 2-cell 2kw boost converter: however, it can be applied directly in any interleaved converter independently of the number of cells.