Running a 3 phase motor on single phase

Hi All. I need some advice. I have a dust extraction fan for my workshop. It’s 3 phase 3.75kw and I only have 240v. The link below demonstrates how to run a capacitor as the 3rd phase. I found a capacitor on ebay but I’m not sure if it’s right for the job.

Can anyone advise me or point me in the right direction.





Would leave that right alone. Doing the wrong thing here could be catastrophic, expensive smoke and smells not to mention possible loss of life.
There are commercial units around. Not sure exactly how they work but I think they may rectify the mains (240V) to DC (339V) then generate 3 phase with inverter.
Cheers Bob


Hey Dave,

Definitely flying right into the danger zone here. If you don’t know how to do these calculations, don’t start with mains voltage.

Grab a triac or AC wall adapter and drop it down to well below 50V AC RMS, and do your experimentation at non-lethal voltages. Learn all of the theory and application first in a sandbox before working with stuff where a mistake can kill you.

That or you can get an off the shelf engineered three-phase inverter.

Or do an electrical trade/get a qualified electrician to help you out and teach/supervise.

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