... VFD, variable frequency drive, VSD, variable speed drive, AC motor drive, energy saver, speedchanger, variator, speed controller1 Features of ... Pulse/analog input output channels;3> 8 segments speed control;4> Bears automatic voltage regulation (AVR) and automatic ... machine, metallurgy machine etc.2> Long-distance control to start/stop of the motor: blower, food, chemical machine, packing machine, ...