A new family of energy-based non-linear controllers for switched power converters

The problem of regulating the output voltage of switched power converters has attracted the attention of many control researchers for several years now. Besides its practical relevance in modern power systems for satellites, noncivilian, industrial and consumer electronic applications, these systems are an interesting theoretical case study because they are switched devices whose averaged dynamics are described by a bilinear second order non-minimum phase system with saturated input and highly uncertain parameters-the load resistance and the input voltage. In this paper, the authors apply a recently developed energy-based controller design technique to generate a new family of nonlinear controllers for switched power converters. In contrast to other schemes reported in the literature, their controllers do not rely on the systems inversion, hence they can directly regulate the output signal, which as is well-known is a nonminimum phase output. Furthermore, the control laws are simple static state feedback