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Siemens VFD

Discussion in 'Electronic Design' started by Ink Maker, Aug 14, 2007.

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  1. Ink Maker

    Ink Maker Guest

    In our 6x12 three roll mill, we use a Siemens Micromaster 440 VFD. The
    input power is 3 phase, 208V, 60 Hz. Can I connect it directly to a
    single phase 220V, 60Hz power supply?


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  2. Robert Baer

    Robert Baer Guest

  3. mpm

    mpm Guest

    You cannot generally operate 3-phase equipment on single-phase
    You can "fake" the other phases using a phase-maker.
    They're noisy electrically, and in my experience prone to long-term
    failure, but they do work.
    A motor-generator setup can accomplish the same thing.

    You might luck out and be able to convert the equipment to 1-phase.
    Sometimes, it can be as simple as changing the taps on the equipment's
    main power transformer. I am not familar with the equip, so you'll
    have to ask someone who is.

    Either way, if you can run it on 1-ph, it probably won't be as
    efficient, or will require a higher amperage than it would on 3-ph
    (which makes sense). I mention it only because there is the
    possibility the 1-ph service might not be sized appropriately.
  4. JosephKK

    JosephKK Guest

    Ink Maker posted to
    It may work. If it does you should derate the thing to about half
    power. Feeding it properly with a phase converter (rotary or
    static) is a better way to go.
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