Amplifier and integrator for Rogowski output

Discussion in 'General Electronics Chat' started by manjuarun, Mar 23, 2010.

  1. manjuarun

    Thread Starter New Member

    Mar 8, 2010
    25
    0
    Hi,
    Anybody of you please help me to design an amplifier and an integrator circuit which will be using for rogowski coil output.
    Specification
    Current to be measured - 50 - 150A (rms)
    Frequency Range - 45-65 Hz
    Rogowski coil output - 1mV - 100mV
    Opamp - should be of single supply with supply voltage 2.7-3.3V (It seems LT1630 , OPA338 etc are good . not sure!!)
    Can anyone of you pls help me to design an amplifier and then an integrator for this application? Is differential amplifier to be designed(bcz of common mode noise)?
    Thanks
    Manju
     
  2. Bychon

    Member

    Mar 12, 2010
    469
    41
    First, if the current to be measured is 50 and the coil output is 1mv, then the current is 150A and the output is 100mv, the coil is not very good. Second, how much time is involved in the integration? Third, how much have you accomplished so far?

    Giving us bad specifications, missing specifications, and no effort to even start designing a circuit gets bad results.
     
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