Power Electronic Converters

8Dynamic Modeling of DDR-Controlled CF Converters

8.1 Introduction

In principle, the methods applied to model the dynamics of DDR-controlled voltage-fed converters introduced in Chapter 3 [1–7] will apply equally also to model the dynamics of the current-fed converters. The main problem encountered, in practice, is the inability to recognize the correct input and output variables, which are naturally interchanged compared to the voltage-fed converters [8]. When the converter is fed by a current source, the internal mode of operation is classified based on the behavior of capacitor voltage similarly as in case of the voltage-fed converters based on the behavior of inductor current [9]: The operation mode is continuous if the corresponding ...