bensonelectric
Senior Member
My instructor and I were talking today about replacing a broken motor on a drill press, we settled on a nice 3-phase 1/3 horsepower motor. He then started talking about using a variable frequiency drive to control the speed of the motor. What exactly do 'VFD's do? The one we are using only takes 117v single phase in, but manages to output 208v 3-phase power. How is this possible?