Tri-port active bridge power flow and switches' losses analysis under ZVS series resonance Operation for HEV applications

TAB with series resonance tank have been thoroughly investigated when operating in ZVS through the whole 6 operation points (A-B-C-D-E and F) that represents different direction of power flow. A closed loop control has been designed in PSIM to regulate the output voltage at a constant value for different loads. Moreover, Non-ideality factors of a real Power MOSFET switches have been analyzed in thermal module in PleXim to have a better insight view to TAB Operation. It have been noticed that the Operation point D in which the fuel cell is fully deliver the power to both the backup battery and the load has the worst case scenario in terms of switches losses and stress. ON the other hand operation points C have the optimum operation case. Thereby, it is recommended to operate TAB at the point C to ensure the maximum efficiency as well as to have the lowest switches stress if possible.