ATO 7.5hp 220V VFD can converter Single Phase to 3 Phase, and control a three phase vfd speed easyly. If you replace the motor with a 3 phase motor, the ATO VFD's are an extremely simple unit to install and operate. Turn a dial to vary the speed, flip a switch to change the direction. However you need to consider if you will have suitable spindle speed when the motor is topped out. Topped out depends upon the max recommended motor rotor speed and the VFD’s capability. Also it doesn’t hurt to up rate the motor horsepower maybe as much as 3X the current motor to help with that low end torque.

ATO 7.5hp 220V VFD Single Phase to 3 Phase Specification:

Input: 1 phase AC220~240V, 50Hz/ 60Hz

Output: 3 phase, AC 0~input voltage, 0.00~400.00Hz

Rated current: 24A

Capacity: 7.5 hp (5.5 kW)

Dimension: 134*91*92 inches

Speed regulation: 1:100

Communication: RS485