Estudio de corriente circulante y de conmutación suave en el convertidor dual active bridge : diseñar y simular una estrategia para asegurar conmutación suave en un convertidor dual active bridge.

Abstract

In this curricular integration work, the design and simulation of a Dual Active Bridge (DAB) converter is carried out applying a strategy to obtain soft switching, in this case zero voltage switching (ZVS). The application of an electric vehicle charging station is considered in order to design the converter and analyze its behavior in minimum and maximum working ranges and under ideal power conditions, as well as its efficiency. A Simple Phase Shift (SPS) modulator is applied, which allows the switching of the semiconductor elements and generates a phase shift angle between the bridges of the OBD, which is proportional to the power delivered by the OBD converter. The ZVS switching technique and its relation to the parasitic capacitances of the semiconductors and the dead times to be implemented in the SPS modulator are studied. The working areas where ZVS exists for different operating cases are explored. Finally, efficiency results of the DAB converter are obtained both when it works in ZVS and when it does not work in this condition, in addition, results of the thermal behavior of the semiconductors are obtained.