ELECTRIC POWER INVERTING DEVICE Russian patent published in 2003 - IPC

FIELD: electrical engineering; adjustable-inverter drive systems. SUBSTANCE: device designed for electric power conversion and its control without using intricate system for gain and phase difference correction and suppression of beats caused by dc voltage ripples at inverter input has ripple capacitor, inverter, ac motor connected to inverter, and unit for regulating voltage, frequency, or phase of ac current at inverter output. This device is distinguished by device that functions to regulate at least either voltage, or frequency, or phase of ac current at inverter output with respect to ac component of current, frequency of this component being equal to ripple rate in output ac voltage of inverter caused by ripples in dc current at rectifier output. EFFECT: simplified design; facilitated suppression of beats set up due to dc current ripples at rectifier output. 12 cl, 22 dwg