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The Rogowski Coil

Discussion in 'Electronic Basics' started by Randy Gross, Oct 30, 2004.

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  1. Randy Gross

    Randy Gross Guest

    I am trying to gain a better understanding of the principles of the
    Rogowski coil.
    I understand that an AC current carrying conductor running through
    this coil induces a voltage in the coil proportional to the rate of
    change of current in the conductor which can be measured with a DVM.
    What I'm having a problem with is the integrator associated with its
    use. Is this necessary for frequencies above 60HZ or any range? Can
    this coil be calibrated to read say 1vac at 1amp AC 60HZ as a basis
    and then be used over a wider range?

    Wondering
     
  2. Randy Gross

    Randy Gross Guest

    Spec8000.pdf contains a definitive explanation of the Rogowski Coil
    except for one ambiguous area: the flexible coil was defined as having
    an electrical connection at only one end, which is a bit confusing
    because of traditional circuit paths: "Input" and "Output". Have I
    misread?

    Randy
     
  3. Joe

    Joe Guest

    Randy,

    From the other website, it describes the rogowski as ...

    The Rogowski coil is an electrical device for measuring alternating current
    (AC). It consists of a helical coil of wire with the lead from one end
    returning through the centre of the coil to the other end, so that both
    terminals are at the same end of the coil. The whole assembly is then
    wrapped around a straight conductor. A voltage is induced in the coil
    proportional to the rate of change of current in the straight conductor.

    The Rogowski has an output ... which in the case of the spec8000, it's
    permanently attached to the integrator. The input is the electromagnetic
    field generated by the current down the conductor which has the rogowski
    wrapped around it.

    Joe
    http://www.fcctests.com
     
  4. Randy Gross

    Randy Gross Guest

    Thanks Joe,

    I understand the "Rogowski Coil". I ran across its mention on a site
    that was using a light-gas gun in an attempt to compress hydrogen gas
    into hydrogen metal. The results of the test were instantaneous and I
    could not determine wether the attempt succeeded. The "Rogowski Coil"
    was used in the test circuitry.

    Randy
     
  5. Joe

    Joe Guest

    Randy,

    No problem. The applications I saw and used Rogowski's were in the VLF
    band and the bandwidth required was alot smaller than the application you
    described.
     
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