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  1. #11
    I think you will find that the 220v input is 220v three phase, not 220v single phase.


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  2. #12
    Quote Originally Posted by scooterist007 View Post
    I think you will find that the 220v input is 220v three phase, not 220v single phase.


    Sent from my CLT-L09 using Tapatalk
    This one seems to be quite specific.


    https://www.ebay.co.uk/itm/2-2KW-3HP....c100005.m1851

  3. #13
    Clive S's Avatar
    Lives in Marple Stockport, United Kingdom. Last Activity: 11 Hours Ago Forum Superstar, has done so much to help others, they deserve a medal. Has been a member for 9-10 years. Has a total post count of 3,333. Received thanks 618 times, giving thanks to others 78 times. Made a monetary donation to the upkeep of the community. Is a beta tester for Machinists Network features.
    Quote Originally Posted by scooterist007 View Post
    I think you will find that the 220v input is 220v three phase, not 220v single phase.


    Sent from my CLT-L09 using Tapatalk
    The description seems to say

    Variable-Frequency-Drive-Inverter-CNC-Motor-Speed-VFD-Single-To-3-Phase-220-380V
    ..Clive
    The more you know, The better you know, How little you know

  4. #14
    I know the listing says single phase 220v to three phase 380v, but it is £80 and if that is true, it is not only a vfd, it's a generator as well, I looked at the data plate and although it is quite blurry, it doesn't say in the output section that it's 380v, it only says 3 phase and 2.2kw, it doesn't state what voltage.

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  5. #15
    Hi all the Dual speed motor is as previously said a 2.4Kw motor so would require at least a 3HP invertor but this would only power light use. So i would require in my opinion a 5HP invertor and the invertor would have to be a dual stage invertor which as some of you have already said are not the normal invertors that would power a dual voltage motor.

    Dual speed motors require different invertors this is why i have asked if anyone on here knows or has something to offer me.
    This is the motors plate: Type YD112M-8/4 –TH


    INS.CL= B
    Connection Δ/2Y
    1.5 / 2.4 Kw
    4.6- 4.9 A Rating: S1
    50 Hz
    Rpm 700/1410
    415 V
    IP 44/46
    Capacity 2KVA

    A 240V to 415V Digital phase invertor is the way forward so i ask that if anyone has a second hand unit that is working i would appreciate the help.


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    Last edited by sheffstaff; 10-01-2019 at 08:19 PM.

  6. #16
    Chaz's Avatar
    Lives in Ickenham, West London, United Kingdom. Last Activity: 2 Weeks Ago Has been a member for 9-10 years. Has a total post count of 1,600. Received thanks 110 times, giving thanks to others 69 times.
    Quote Originally Posted by scooterist007 View Post
    I know the listing says single phase 220v to three phase 380v, but it is £80 and if that is true, it is not only a vfd, it's a generator as well, I looked at the data plate and although it is quite blurry, it doesn't say in the output section that it's 380v, it only says 3 phase and 2.2kw, it doesn't state what voltage.

    Sent from my CLT-L09 using Tapatalk
    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.

  7. #17
    GH-1440A ? You could always ask Warco for their advice. Is the problem that you have moved the lathe out of the 3 phase environment ?

  8. #18
    Yes the Lathe has been moved from a 3 Phase environment I didn't know that the Lathe came from Warco ? I thought that they were from a place called Toolco.

  9. #19
    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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  10. #20
    All these VFD's will be rectifying the AC input to DC, and then doing stuff with that to make the 3 phase O/P. For low power (and low cost) you can use a capacitor/diode voltage doubler on the input to generate ~650V DC, alternatively for larger power you can use a switchmode Power factor Corrector (PFC) stage to do the same and also keep you legal for harmonic currents. This will need just one (or a few) small decent inductors, if the switching frequency is high it's quite possible to get 3 KW through a couple of cores maybe 35 or 40mm across, larger powers pro-rata, so you don't need massive transformers.

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