I'm considering changing my old CNC lathe around so it runs solely on 240V, but the turret motor is a bit of a problem.
It's a 3 phase 600W 110V motor, which is currently powered from a 3 phase 415 -> 110V transformer and then controlled via two interlocked contactors.
If I was to power it with a standard 240V VFD, am I correct in thinking, all I need to do is change the rated motor voltage setting in the VFD from 230V, to 110V?
Obviously I need to oversize the VFD to allow for the higher current at lower voltage (I'd probably got for a 2.2KW VFD to give plenty head room, as it needs to be able to reverse the motor very quickly), but I've never played with trying to get them running a lower voltage motor.
Other option is a 240V boost VFD that feeds directly in to the transformer, and keep the existing contactors for control.
It's a 3 phase 600W 110V motor, which is currently powered from a 3 phase 415 -> 110V transformer and then controlled via two interlocked contactors.
If I was to power it with a standard 240V VFD, am I correct in thinking, all I need to do is change the rated motor voltage setting in the VFD from 230V, to 110V?
Obviously I need to oversize the VFD to allow for the higher current at lower voltage (I'd probably got for a 2.2KW VFD to give plenty head room, as it needs to be able to reverse the motor very quickly), but I've never played with trying to get them running a lower voltage motor.
Other option is a 240V boost VFD that feeds directly in to the transformer, and keep the existing contactors for control.
