DC-DC POWER CONVERTER WITH HYDROGEN FUEL ELEMENT

The invention refers to electrical engineering and can be applied in power electronics supply systems. Its objective is to increase the efficiency of a DC/DC power converter. The offered DC/DC power converter with hydrogen fuel cell contains fuel cell 1, two controllable switches 3,4, two diodes 5,6, additional DC/DC power converter 12, on phase high frequency transformer 7, one phase rectifier 8, output filter 9 and load 10. The distinctive properties of the proposed topology are defined by an input filter capacitor 2 connected to the fuel cell 1 output and by diodes 5,6, which common cathode is wired to a positive output of a double layer capacitor 11, but its negative output is joined to a negative output of the fuel cell 1. Double layer capacitor 11 is connected to the input of the addditional DC/DC power converter 12, which output is wired to the input filter capacitor 2. Positive impulse in one of the one phase high frequency transformer 7 primary windings is formed by connecting it to the fuel cell 1 with controllable switch 4. When turning off the controllable switch 4, a self-induction EMF appears, which energy is accumulated in the double layer capacitor 11 trough the diode 5. Transformed energy of the positive pulse is allied to the load 10 through the one phase rectifier 8 and output filter 9, but accumulated energy in the double layer capacitor 11 is delivered to the input filter capacitor 2 through the additional DC/DC power converter 12. The negative pulse is formed symmetrically and then the operation cycle of the converter is repeated.