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13-04-2023 #1
From the plate this seems to be a 2 speed motor, that is, wound as a 4 pole but the windings switchable to run as 2 pole at double the speed (i.e. 1400 & 2800 rpm). If the star point is accessible you could change it from star (380v) to delta (230v) running, though I think that's a bit trickier with a 2-speed motor. You could also run it from a lower voltage 230v inverter anyway, it will run at whatever speed is selected but just give a bit less power. Apparently if you actually reduce the speed to about 30Hz you can get the same power. Inverter Drive Supermarket sell drives, possibly 230v in 380v out ones, and they also have a note on their website about running at lower speed. Find them with Google.
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13-04-2023 #2
Hi John
Thanks for your prompt reply. Yes it is 2 speed done with a mechanical switch. manual shows single phase and three phase link up. is that delta config.
Have attached a copy of the 3 phase wiring that i got when i first bought the lathe, the recently purchased motor is Emco specific but don't know if it's same as shown in the circuit diagram.
will check out your link, What size (Kw) would be required?
will try and get a photo of the wire colours on the 3 Phase motor if that helps.
Kindest Regards
Mike
Last edited by mekanik; 13-04-2023 at 05:27 PM.
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