METHOD FOR CONVERSION OF THREE-PHASE VOLTAGE IN DIRECT VOLTAGE

摘要

A method for conversion of three-phase-voltage to direct voltage relates to electric engineering and can be used for creation of DC voltage sources, which are powered from the three-phase network. The method consists in rectifying three-phase voltage by a 6-pulse diode bridge and further smoothing by a filter with a voltage inverter. A portion of output power is used for the inverter power supplying. The inverter control is made upon condition providing output current of the diode bridge and output voltage regulation. Also, the voltage inverter which is a part of the filter can be powered from the three-phase network. Control input currents thereof is realized providing maximal input power coefficient of the “diode bridge + inverter” system. The technical result is increase of quality (improvement ) of voltage supply due to decrease of high current harmonics emission, increase of a power coefficient, decrease of consumed current and decrease of energy losses in the network.