METHOD OF LIMITING FAILURE OF CURRENT RECTIFIER WITH POWER SEMICONDUCTOR DEVICES AT SHORT-CIRCUIT IN CONSTANT VOLTAGE INTERMEDIATE CIRCUIT Russian patent published in 2011 - IPC H02M7/12 

FIELD: electrical engineering.

SUBSTANCE: proposed device comprises rectifier (1) with at least one-phase module (3a, 3b, 3c) with varying voltage terminal (3₁, 3₂, 3₃), at least one terminal (p, n) connected with constant voltage intermediate circuit (4), and with at least one power accumulator (5, 13). Note here that branch (6ap, 6bp, 6cp, 6an, 6bn, 6cn) of phase module is formed between each terminal (p, n) and each terminal (3₁, 3₂, 3₃). Note also that each branch (6ap, 6bp, 6cp, 6an, 6bn, 6cn) incorporates serial connection of sub modules (7) that incorporates at least one semiconductor device (8, 9), safety semiconductors (10) in parallel connection with each power semiconductors (8, 9), safety semiconductor control unit (10), and power accumulator(s) (5, 13) on connection to power supply circuit. One output (p) of phase module constant voltage (3a, 3b, 3c) is connected via constant voltage switch (15) with constant voltage intermediate circuit (4).

EFFECT: better protection against short-circuit on constant voltage side.

10 cl, 9 dwg