The present invention relates to a single-sourced H-bridge multi-level inverter. According to the present invention, provided is an H-bridge multi-level inverter comprising: a first capacitor which has first and second terminals which are connected with first and second terminals of an input power source, respectively, and removes a ripple from first DC power supplied from the input power source; a first H-bridge inverter which has first and second DC terminals which are connected with the first and second terminals of the first capacitor, respectively, and a first AC terminal which is connected with a first terminal of a load; a first voltage converter which has first and second input terminals which are connected with the first and second terminals of the input power source, respectively, lowers the first DC power to second DC power, and outputs the second DC power between first and second output terminals; a second capacitor which has first and second terminals which are connected with the first and second output terminals of the first voltage converter, respectively, and removes a ripple from the second DC power; and a second H-bridge inverter which has first and second DC terminals which are connected with the first and second terminals of the second capacitor, respectively, a first AC terminal which is connected with the second AC terminal of the first H-bridge inverter, and a second AC terminal which is connected with a second terminal of the load. According to the single-sourced H-bridge multi-level inverter, a multi-level AC output can be obtained by using only the single input power source by using a voltage converter of a modified buck converter configuration as an auxiliary power source for the single input power source. Also, it is possible to separate ground terminals for respective terminals of a plurality of H-bridges and guarantee insulation between the ground terminals.;COPYRIGHT KIPO 2016
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