LV13948A - Multilevel dc/ac porer inverter with hydrogen fuel cell - Google Patents

Abstract

The invention refers to electrical engineering and can be applied in power electronics supply systems. Its objective is to increase the efficiency of a multilevel DC/AC power inverter. The offered multilevel DC/AC power inverter with hydrogen fuel cell contains fuel cell 1 and capacitor 8. The distinctive properties of the proposed topology are defined by a one phase transformer 10, where the common point of two primary windings in series connection is wired to the fuel cell 1 positive output. The fuel cell 1 negative output is connected to four controllable switches 2, 3, 4, 5, where the first controllable switch 2 is wired to one free end of the one phase transformer 10 primary windings, the fourth controllable switch 5 - to second free end, the second controllable switch 3 is joined to the negative output of the first capacitor 8 and the third controllable switch 4 - to the negative output of the second capacitor 9. The positive output of the first capacitor 8 is connected to one free end of the one phase transformer 10 primary windings and with the fifth controllable switch 6 - to the common point of the two primary windings, but the positive output of the second capacitor 9 is connected to second free end of the one phase transformer 10 primary windings and with the sixth controllable switch 7 - to the common point of the two primary windings. The first level positive pulse in one of the primary windings of the one phase transformer 10 is formed by wiring it to the fuel cell 1 and the second capacitor 9 in series connection with the third controllable switch 4, besides, simultaneously the second capacitor 9 is charged. The first level negative pulse in one of the primary windings of the one phase transformer 10 is formed by supplying it from the second capacitor 9 through the sixth controllable switch 7. The second level positive pulse in one of the primary windings of the one phase transformer 10 is formed by wiring it to the fuel cell 1 with the fourth controllable switch 5. The pulses in second primary winding of the one phase transformer 10 are formed symmetrically.