ALTERNATING VOLTAGE/CONSTANT VOLTAGE CONVERTER WITH TWELVEFOLD PULSE FREQUENCY Russian patent published in 2008 - IPC H02M7/08 

FIELD: electricity.

SUBSTANCE: alternating voltage/constant voltage converter with twelvefold pulse frequency can be used as uncontrolled or controlled alternating voltage/constant voltage converter for electric power supply mainly to high-voltage load and for multilevel voltage inverters. It contains three four-phase gate bridges (1, 2, 3) and transformer phase converter (4) which has five secondary phase windings on each limb of three-phase transformer. These secondary windings form three groups of windings (5, 6, 7). Each group of secondary windings is made up of two opposite equilateral zigzags with mutually reversed phases. Midpoints of these zigzags formed by starts of windings are connected with beginning, and midpoints formed by ends of phase windings are connected with the end of secondary phase winding of transformer limb, which transformer does not contain phase windings forming these zigzags. Four phase winding outputs created in each group are connected with inputs of one of four-phase gate bridges: outputs of winding group (5) - with inputs of bridge (1), group (6) - with inputs of bridge (2), group (7) - with inputs of bridge (3). Among themselves the bridges are connected by outputs with different poles, at that, load (10) is connected to output terminals (8, 9) of bridge (1) and bridge (3) respectively, and tap leads with terminals (11, 12) are made from connection points of bridges (1, 2) and (2, 3).

EFFECT: minor mass and dimensions parameters and better frequency contents of rectified voltage.

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