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3 phase converters

Discussion in 'Lounge' started by Thewespaul, Oct 9, 2019.

  1. Thewespaul

    Thewespaul Supporting Vendor Supporting Member

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    I run a 3 phase converter to run my 5hp Bacharach test stand since I don’t have 3p going out to where it’s setup right now. Well Sunday night the converter cooked itself pretty good and ate up some of the wiring. I’ve got it back up and running on my generator, but I would like to replace the converter with a quality unit that will support my larger stands if necessary. Open to some suggestions, I don’t have a lot of experience with converters so hoping the collective can point me in the right direction, thanks y’all!
     
  2. DaveBen

    DaveBen Supporting Member Supporting Member

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  3. Oledirtypearl86

    Oledirtypearl86 Full Access Member

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    My dad is an electrical engineere he said the converters have come light years in the past few years but all iv ever used was a rotary inverter for our compressor to fill air tanks
     
  4. PROFG

    PROFG Full Access Member

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    Advantage of modern digital 3 phase converter, up to 10 hp, is fit in a lunchbox, input 240v ac OR dc, speed control, current limiting, full torque @ low rpm, etc. Often find a 3 phase motor and speed control for less than same HP single phase/single speed.
    A typical 4-kW rotary has a fairly constant 500-W of parasitic losses (windage, bearing losses,iron losses, and copper losses). So at full power - supplying a 4-kW load, it is 89% efficient. Clearly as load falls off this efficiency figure worsens, e.g. to 80% for a 2-kW load, and 67% for a 1-kW load
     
    Last edited: Oct 10, 2019 at 7:14 AM
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  5. IDIoit

    IDIoit MachinistFabricator Supporting Member

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    I run my entire shop on a phase converter.
    if youre looking for a VFD, I have one forsale

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  6. IDIoit

    IDIoit MachinistFabricator Supporting Member

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    pics of the VFD, never been used.

    71845575_402933207298999_1575152502456713216_n.jpg

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  7. PROFG

    PROFG Full Access Member

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    Have one, 5hp, used on electric roto tiller for a test. Don't run over the cord (DAMHIK).
     

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