Motor swap on my big belt grinder to install a 4.4Kw (5.9hp) three-phase motor controlled via VFD for speed controls. The dial indicates "surface feet per minutes" (SFPM), calculated from wheel ...

A Variable Frequency Drive (VFD) regulates the speed of a 3-phase AC electric motor by controlling the frequency and voltage of the power it delivers to the motor. These devices, also known as ...