HIGH-VOLTAGE CONVERTER WITH A PRECHARGE (VERSIONS) Russian patent published in 2019 - IPC H02M5/40 

FIELD: electrical engineering.

SUBSTANCE: invention relates to electrical engineering and can be used in a powerful electric drive. High-voltage converter with a precharge contains series-connected rectifier-inverter units (8) connected by their inputs to secondary windings (2–7) of the power transformer, and the outputs of these units are connected to load (9). Primary winding of power transformer includes switch (13). Resistor is connected in series with secondary winding of transformer (10). Secondary winding of a pre-charge transformer with a serial resistor is connected between zero points of load stars and rectifier-inverter units, and a starting contact is included in the primary winding of the pre-charge transformer.

EFFECT: simplification.

2 cl, 2 dwg