2.2KW CNC Spindle Motor Speed Control Variable Frequency Drive VFD Inverter 220V admin January 6, 2024 The input for this VFD is 1 phase. 2.5KW 220V Variable Frequency Drive Inverter CNC VFD VSD Single To 3 Phase. How To Install This VFD. (220V class for single phase, single phase connected to any two phases).