Quote Originally Posted by Chaz View Post
Very few actually make 380V. The HY ones DO NOT make 380V, they are listed as 220V and 380V input but do not upconvert. The Egogo (spelling) ones do but cost more. This seems to cheap for it to do the same ..... need true RMS meter and then see if it does, but dont be surprised if it does not.
Ok I did a search and the company your talking about is ecogoo, that's the only company that makes them, all the usual manufacturers ie Mitsubishi, Allen Bradley, Siemens etc do not make one, I don't see how they can make a true 220 single phase to 380 three phase, the only way I can see it happening is by converting it to DC and then chopping it to make the three phases and inverting it back to AC which would then be 220v three phase, then they would have to up the voltage to 380v, the only way to do that is generate the 220 supply, so that would mean using transformers, now some of the vfd's are saying they are for 20 odd kw, now to get that amount of power from a original 220v single phase supply they would have to use a big transformer! And the vfd's I see for sale are not that big, so I resort back to my original post that you can't get a 220v single phase to 380v three phase vfd that is a true accurate one

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