FIELD: electrical engineering.
SUBSTANCE: proposed device (1) comprises power supply terminal (4) to connect AC power supply circuit (2) and consumer terminal (5) to connect multi-phase consumer (3). Note here that rectifier (6) is connected behind terminal (4). The latter is connected, via intermediate DC circuit (8) comprising smoothing device (12) with inverter (9) connected, on the AC side, to aforesaid consumer connection terminal (5). Note also that rectifier (6) and inverter (9) comprise thyristor gates (9a+, 9b+, 9C+; 9a-, 9b-, 9c-), while control unit (14) triggers thyristor gates (9a+, 9b+, 9c+; 9a-, 9b-, 9c-.) of inverter (9) depending upon timed signal. Control unit (14) is connected to timed pulse generator-transducer that enjoys independent power supply. Capacitative-type apparent resistances (13) are connected to inverter (9) to switch current in direction of power flow, or aforesaid multi-phase consumer (3) has apparent resistance of said capacitative type sufficient to switch current.
EFFECT: higher reliability of power supply.
11 cl, 3 dwg
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