Convert Single Phase To 3 Phase

220 to 575 volt transformers are available Wayne. It may be getting expensive by the time you get a VFD and the transformer though. One thing you'll need to check is the transformer for the relays in the lathe. It may or may not have taps for 220.

Greg
 
It simple to build a rotary phase converter if you are do it your self person
It no more than three phase motor use to generator for the third leg
The ease way to build one is use three phase motor (Star would not delta wound) and smaller single phase motor to start the larger three phase motor note both motor must be the same RPM (Do not use belt drive)
Now just hook your input power to the three phase motor to T1 and T2 The T3 is use for your third leg of the three phase power.
Note rule of thumb is for the motors is 1 (start motor) to 5 (3 phase motor / leg generator)
Use a 1725 / 4 pole motor a 3450 / 2 pole has a lot of back ground nose Found this out after making the first one after about week change to 1725 motor use this one for 40 years till ever thing was sold.

Other detail at http://www.homemodelenginemachinist....-2012-273.html
Also at one time I upload on this data on this site


Dave
 
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