Isolated DC-DC power converters with high-output voltage for TWTA telecommunication satellite applications

Two alternatives for the implementation of an isolated DC-DC power converter with high output voltage are presented. The proposed topologies are especially well adapted for the implementation of travelling wave tube amplifiers (TWTA) utilized in telecommunication satellite applications. The converters studied follow different principles and the main operation aspect of each topology is analyzed. The experimental results obtained from two prototypes with 150 W output power, total output voltage of 3.2 kV and an input voltage variable from 26 V until 44 V are presented. The efficiency obtained operating with the nominal output power is higher than 93.4% for both structures.