POWER CONVERTER WITH DISTRIBUTED CONTROL OVER CELLS Russian patent published in 2013 - IPC H02M7/483 

FIELD: electricity.

SUBSTANCE: device to convert DC voltage into AC voltage and back includes a control system to control voltage conversion and at least one phase circuit (1), in which the first (Uvp1) source of voltage is connected in series between the first DC terminal (4) and the first AC terminal (6), and in which the second (Uvn1) source of voltage is connected in series between the first AC terminal (6) and the second DC terminal (5). Each of voltage sources comprises at least the first and second submodules (15), connected in series, besides, each submodule (15) comprises at least two electronic power switches (16), connected in parallel with at least one capacitor (17). The control system comprises a central control unit (19) and at least two subunits (20), besides, the central control unit (19) sends to each subunit (20) the reference AC voltage (ua_ref) and the bearing signal (s_sw) of switching, and each subunit (20) controls switching of electronic power switches (16) of one of submodules (15) according to a WPM template so that each time, whenever the bearing signal (s_sw) of switching crosses the reference AC voltage (ua_ref), to output terminals (26, 27) of the appropriate submodule (15) either voltage on the capacitor (17) arrives, or zero voltage.

EFFECT: minimised volume of data sent by a central control unit.

14 cl, 8 dwg