MULTILEVEL AUTONOMOUS VOLTAGE INVERTER Russian patent published in 2010 - IPC H02M7/527 H02M7/538 H02M7/53862 H02P27/08 

FIELD: electricity.

SUBSTANCE: multilevel autonomous voltage inverter include two modules, each containing n keys connected in series by same-name outputs. Each key is formed by anti-parallel connection of full-control valve and diode. Initial and final outputs of first module keys are dissimilar to initial and final outputs of second module keys respectively, and initial output junction and final output junction points of two modules are used for load connection. Number of keys connected in series by same-name outputs n=2·(2·N-3), where N is the number of non-negative levels of output voltage in inverter. In key junction points of two modules under the same number k, where k is an integer from natural sequence 1, 2, 3, 4, 5… counted from both output terminals, condensers are connected for odd k=1, 3,…,2·N-5 and similar keys are connected for even k (total of 2·(N-2) condensers and keys) respectively. Anodes in diodes of the indicated keys and positive outputs of condensers are connected to cathode junction points of module diodes, while cathodes in diodes of the indicated keys and negative outputs of condensers are connected to anode junction points of module diodes. Middle points of the two modules, i.e. points with k=2·N-3 serve for direct voltage source connection: positive output is connected to cathode junction point of diodes, and negative output is connected to anode junction point of diodes.

EFFECT: simplified construction.

5 dwg