FIELD: electricity.
SUBSTANCE: invention relates to a three-phase source of uninterrupted power supply. The offered circuit of the electric power converter with input interface which comprising multiple input lines, each of which is intended for coupling with a phase of a multiphase AC power source with a sine signal; set of DC buses including the first positive DC bus with the first rated DC voltage, second positive DC bus with the second rated DC voltage, first negative DC bus with the third rated DC voltage, and second negative DC bus with the fourth rated DC voltage; The circuit of the electric power converter comprising the first electric power converter and the second electric power converter, each is connected with AC input and at least with one of multiple DC buses.
EFFECT: implementation of the offered invention without using of step change in operation of two electric power converters so that the load could be fed by the standard three-phase electric power.
20 cl, 16 dwg
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