low-voltage inverter apparatus of Low harmonic

摘要

The present invention relates to a low-harmonic low-voltage inverter device. According to the present invention, the low-harmonic low-pressure inverter device includes: a transformer unit including a low-pressure multi-wire transformer which receives power from a power supply unit and converts the phase of the supplied power in a multi-level scheme to suppress the generation of high frequency waves while supplying power to each wire of the low-pressure and multi-wire transformer with 15 degrees in the voltage phase difference; a converter unit including multiple low-voltage converters which receive the power with the converted phase from the transformer unit and convert AC power supplied thereto to DC power; an inverter unit including multiple low-voltage inverters which receive the power converted to DC power from the converter unit, convert the frequency of the supplied power, and supply the power with the converted frequency to a motor unit including one or more motors; and a control unit which controls the division of the inverter unit and multiple systems.