current sensor based on Rogowski coil

Discussion in 'The Projects Forum' started by abadi, Nov 8, 2009.

  1. abadi

    Thread Starter New Member

    Nov 8, 2009
    16
    0
    hi guys
    dont know what to say

    im just having my final year project and its about "current sensor based on Rogowski coil"

    and i have read alots about it in enter net ,

    but my problem is , i dont know how to start my project :(

    so, i hope you guys can help me on that :

    how to start this project ???????????
     
  2. bertus

    Administrator

    Apr 5, 2008
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  3. t_n_k

    AAC Fanatic!

    Mar 6, 2009
    5,448
    782
    Your problem is probably not so much about where to start - rather about the vague definition of your design goal. A project about "current sensor based on Rogowski coil" is too general.

    As a starting point write a brief specification possibly including things like

    1. What you need to measure, including the magnitude, frequency and type(s) of waveform.
    2. What output signal type & range for a given input current type & range you need.
    3. What form of indication - CRO, meter (average, RMS, etc) ????

    Once you can answer some of these questions, that might help you make some decisions about design & construction.
     
  4. Duane P Wetick

    Active Member

    Apr 23, 2009
    408
    19
    Are you looking for a particular inductance or coil size? One reference that might help you is: Inductance Calculations by Grover, ISBN 0 486 49577 9.

    Cheers, DPW

    [There is no computerized explorer with more than a tiny fraction of the power contained in the chemical analog computer known as the human brain, whose reproduction is easily accomplished by un-skilled labor. WVB]
     
  5. hithere

    New Member

    Nov 7, 2009
    5
    0
  6. abadi

    Thread Starter New Member

    Nov 8, 2009
    16
    0
    thanx guys :)
    for the help :D
    i will do my best and try to figur-out my project
    and i will be back :D
    wait for me :D

    thanx alots
     
  7. abadi

    Thread Starter New Member

    Nov 8, 2009
    16
    0
    hi guys :)
    im back
    i just want to ask , how can i design the coil ?? is it like bring a plastic shape and round it by a wire or what ?
    or there must be special wire ??
     
  8. Duane P Wetick

    Active Member

    Apr 23, 2009
    408
    19
    Do you have any idea as to the size of coil you need? The first step is to find a ring form for winding the coil. Just now I see a coiled poly air hose in my garage, 5" in OAD and 1/2" in tube OD. Cutting a section of this, I can stretch it out and wind a 2 wire coil easily by hand, using any magnet wire size I desire. Winding 2 wires allows both leads to terminate on one end. Using 18 AWG wire, you will need 2 lengths about 40' each. Do you see it now?

    Cheers, DPW[Spent years making heaters out of op-amps]
     
    Last edited: Nov 22, 2009
  9. abadi

    Thread Starter New Member

    Nov 8, 2009
    16
    0
    thanx bro, i already did it :D

    now what type of the amplifier i have to use ?? and why i have to use amplifier ??
    and some of the the circuit they use filter also ?? whyyyyy
     
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