DIRECT CURRENT CONVERTER Russian patent published in 2012 - IPC H02J3/02 

FIELD: electricity.

SUBSTANCE: converter contains series-connected DC buses, three-phase bridge inverter, output transformer and control circuit the input of which is connected to the said buses and the output - to three-phase inverter. Output transformer contains the first, second and third one-phase separate transformers, each of which contains corresponding non-detachable core in a form of hollow straight square prism with rhomb in cross-section, note that the cores are structurally united in such a way that external sides of all three prisms form regular hexagon and internal sides of each pair of rhombs connected by obtuse angles form rods arranged at an angle 120° to each other, note that external sides of the cores parallel to the corresponding rods form composite yoke.

EFFECT: reduction of mass and losses in steel, increase of winding efficiency.

4 dwg