FIELD: electrical engineering.
SUBSTANCE: invention relates to electrical engineering and can be used in a powerful electric drive. Three-phase high-frequency frequency converter comprises series-connected converter units (9), which are supplied from three-phase groups of gate windings of transformers (2, 3, 4), and outputs of group of blocks (9) are connected to motor (12); network winding (7) of transformer (1) is connected to high-voltage switch (8), and winding (6) of pre-charge through current-limiting capacitors (11) is connected to switch (7) of medium voltage network. A short-circuiter (10) is introduced into the converter, which provides short-circuit of capacitors to the star in operating mode, thus providing compensation of reactive power.
EFFECT: technical result is increase in the efficiency.
1 cl, 2 dwg
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