... of fans, pumps, compressors, mills, conveyors and lifts. HARSVERT-A series VFD uses new type of IGBT with advanced microcomputer control ... 100%, very low harmonic voltage/current, no power factor correction capacitor and harmonic filter required Output sine step PWM waveform, no ... can accept two separate channels of auxiliary power supplies of single phase AC or DC for the controller from the user. The ...