Can we help you with spelling? :thumbsup:Can we help you estamate the job too?
Exactly. He cannot just stick the VFD in and expect all the peripheral equipment to work. Push buttons ect.....Also if he disconnects the forward and reverse starters to use for his VFD, there may be aux contacts that close when the starters close, that need to work. Some controls are also wired into the control circuit for safety devices like the access doors. That's why I said to look at the schematic first.
Any and all operator control for the motor must be connected to the drive either directly or using some existing circuitry to make it work.
I also lean towards the VFD. But only because I am familiar with them. Easy peasy.If you use a static phase converter the motor gets de rated by 1/3. So basically a 3hp motor becomes a 2hp motor. This may be a problem if the machine sees a heavy load. Vfd's are pretty cheap now days and most of the ones I've used, you can input single phase or three phase. Overloads are built into the vfd. Just program and go. I've done this on several occasions. Works very well.