3 phase

[vw2v8]

can a 3 phase machine be coverted to run on 240 v electric thanks

[brading]

You can buy 240v to 3 phase converter such as these.

https://www.machinemart.co.uk/p/pc-4...ase-converter/

[trevd]

Manual machines run ok on a converter but cnc machines can be a problem. what machine is it? there are 2 main types of converter, rotary and static, I ran a rotary one for many years with no problems, static ones are not as powerful and have more parasitic loss so not as economical.

[stueeee]

Another option is to use one of these: 2.2kw 3 HP Single Phase In 240v Three Phase Out Motor Inverter AC Drive NEW | eBay
Inverter drives are more efficient than either a static or rotary converter but you will have to do some fiddling with the motor wiring as a minimum. The output of pretty well all these inverters is three phase 240v not "standard issue" 415V. Usually, changing a three phase motor's operating voltage just means moving some straps in the motor's connection box; changing the wiring from star to delta. You may also need to change the contactor coils to 240V if those are 415V now.

Apart from improved efficiency, the main advantage is that you can control the output frequency with an inverter -all induction motors run at whatever speed it says on the data plate because the frequency of mains power is 50 HZ. increase the output frequency from the inverters control panel to 75 HZ means the motor spins 50% faster. What you can and can't practically do speedwise with an inverter is a bit of a subject in itself, but having exact control of spindle speed on a mill or lathe can be really useful.

[Darren West]

depends on why its 3 phase also
it may be due to the motor size or amps it requires to run

please post up full details of the item in question

[352 kum]

inverter dont work well on a mig my tig is 2 phase or can be used on single phase

[vw2v8]

its a pillar drill ill try and get the amps volts tomorow, was thinking of fitting a 240v motor in it but if i could use as is it would be easy er than looking for a decent motor

[Darren West]

a motor may be cheaper than a inverter

[352 kum]

if its an old heavy duty drill the motor may be built into the casing! mine is a 50s herbert? i think and thats part of the machine

[newboldspeed]

Check motor it may be duel voltage 220/440.