... pumps, compressors, mills, conveyors and lifts 1. Variable Frequency Drive characteristicsVFD is a masterpiece of outstanding performance and ... correction capacitor and harmonic filter required Output sine step PWM waveform, no output filter required, VFD is directly ... mill fan, Lignite Mill Filter Fan, By Pass Filter Fan, Kiln. Mining: Conveyor, Lift, Pump. Water: Pump. variable frequency convertor