| Abstract |
An exhaustive analysis of the evolution of current in the input power stage of insulated multistageDC/AC power converter based on the Pulsating DC link principle, characterized by Zero VoltageTransition (ZVT) of the output stage is provided in this work. This topology is featured by an inputpower stage which provides on the second stage a pulsed voltage characterized by zero phases(pulsating DC link) which are used to achieve the ZVT conditions for the commutations of this stage.The specific and innovative topology of this converter influences the evolution of the main electricalcharacteristics and requires more attention on the design. The parameters that affects the behavior ofthe current in this particular topology, especially in the crucial working phases are identified and theirinfluence are analyzed to define the constraints of this system. A complete study of the current hasbeen accomplished by Spice simulator for different combination of leakage parameters of thearchitecture and switching frequency of the two power stages. The obtained results are presented anddiscussed to provide the limits of the design of the main components that compose this particularpower converter. For the experimental validation of the results of the simulation, a 3.5kW prototype of the power converter was assembled and tested on variable load. |
