... , high-temperature fan, air blower, dust collection fan, grinding machine etc.Metallurgy: blast furnace blower, slurry pump, feed water pump ... inverter adopts Power Units in series and overlapping technology to obtain MV directly by means of overlap wave. Low voltage power unit ... harmonics contents is lower of 3%. The power unit is AC-DC-AC structure, equivalent to a low-voltage power source inverter of ...