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Building static phase converter?

Discussion in 'Electronic Basics' started by [email protected], Dec 8, 2005.

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  1. Guest

    We have two right now that we use on our 3 phase motors. One of them
    was damaged(The cap exploded) and the boss when he saw how it was made
    wants to make a couple more. I'm wanting to know some theory before
    starting. The machines to be run from this are up to 3 hp max. One
    lathe, Bridgeport, surface grinder.
    I told him we should use someold 3 phase motors we have to make
    rotart phase converters but boss said no so trying to make a couple
    static ones is where were headed
    Ken
     
  2. John Larkin

    John Larkin Guest

    Tell him you'll need three years and $250,000, but no guarantees.

    John
     
  3. Rich Grise

    Rich Grise Guest

    You'll never be able to make one for what you could buy one for. Just tell
    the boss to spring the couple hundred bucks, because if you try to make one
    from scratch, the bill will be approaching $10,000.00, before any hardware
    is even in place.

    Good Luck!
    Rich
     
  4. Guest

    Cheaper to buy 1 but not hard to make, visit the IR website look for
    the "power train" product.
     
  5. Bob Masta

    Bob Masta Guest

    I think what the OP is talking about is not an active
    device (switchmode or whatever), but a simple
    circuit of capacitors and old motor windings or
    something. A relative who has a small machine
    shop in his garage uses this sort of circuit to
    run his 3-phase machines from his normal 220
    mains. (I'm not gonna get into whether the mains
    are single phase or two phase!) Anyway, I agree
    with the OP's boss that the circuit looked pretty
    simple, but as I recall it did call for an old motor
    that had to be rated high enough to handle the
    desired loads. I don't think the motor turned,
    so it could still be called a "static phase converter",
    but I suspect that there is another name that
    machinists use for these gizmos, and I'm sure
    there must be plans on the Web. Maybe try
    search terms like "3-phase converter"?

    Best regards,

    Bob Masta
    dqatechATdaqartaDOTcom

    D A Q A R T A
    Data AcQuisition And Real-Time Analysis
    www.daqarta.com
    Home of DaqGen, the FREEWARE signal generator
     
  6. Guest

    Anyway, I agree
    with the OP's boss that the circuit looked pretty
    simple, but as I recall it did call for an old motor
    that had to be rated high enough to handle the
    desired loads.
    Your talking about a rotary phase converter. This is what we should be
    using but I'm not incharge just the drone who does all the work
    Ken
     
  7. Mike

    Mike Guest

    My father had a rotary converter made from a "friend" electrician, which
    only cost him a few hundred bucks. The motor he had already, which was 10HP.
    Worked very nicely.

    Mike
     
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