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DavidA:
I've just bought a Denford Viceroy 280 synchro at a very favorable price.

Problem is that it is  (naturally) three phase.

It looks from the info I gleaned from Lathes.com that it will probably be a 1.5 Kw motor.  Haven't looked closely at the lathe yet as it was bought from work and I do know it is a good one.

So,  I need some advice on what is the best way to go to set up a three phase 415 Volt supply that will run this motor.

Do I go for a static convertor or a  rotary ?

Or do I cobble together something using my spare 1.7 Citroen Diesel engine and a three phase gen head ?

I do want the supply to be able to run other motors by simply plugging in.  I don't want a dedicated supply just for this machine.

What do you lot think ?

Dave.

awemawson:
I'd look seriously at an inverter these days. Presuming that you have a main motor and a suds pump can they be wired delta for 240 V ? - If so then that's the way I'd go with a 240 single to 240 three phase inverter. If not you can run a 415 three phase inverter off 415v single phase by applying the 415 v to two of the three inputs. Derive the 415v from a 240-415 isolating transformer. De-rate the inverter as only two of the three input diodes are being used.

Don't forget the suds pump won't be happy at low speeds if you use the inverter for speed control - perhaps give it it's own small inverter, or replace the pump with a single phase one.

John Rudd:
You could go for one of the cheap Chinese vfd's from EBay for about  £100 of you could buy a Teco/Imo unit for twice the price..suitably rated of course...either way stick it in a box with a 3ph socket on the outlet and it should serve othe users......
And it depends if the motor is a dual voltage job.....415/220...???

DavidA:
It really needs to be a 415 Volt 3 phase supply.

Here is the machine.

http://www.lathes.co.uk/viceroy/page3.html

Mine comes with the milling attachment.

Dave.

awemawson:
Rotary converter then. The Transwave offerings are the best in my opinion. Make sure that the generated third leg is not used for the control relays, although this is less critical with a rotary than a static.

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