AC Resistance

Discussion in 'General Electronics Chat' started by bcassidy9, Jun 26, 2013.

  1. bcassidy9

    Thread Starter New Member

    Nov 27, 2012
    5
    0
    Does anyone have any suggestion on how to measure AC resistance? I have a stack up of planar magnetics that I need to determine its AC resistance. I wasn't sure how to go about this right away?
     
  2. Ramussons

    Active Member

    May 3, 2013
    557
    92
    Use a Wheatstone Bridge with an AC source.

    Ramesh
     
  3. studiot

    AAC Fanatic!

    Nov 9, 2007
    5,005
    513
    Planar magnetic whats?

    AC resistance (are you sure you want resistance) at what frequency?
     
  4. wmodavis

    Well-Known Member

    Oct 23, 2010
    737
    150
    Use Ohms law.

    1. Apply AC voltage set for appropriate frequency to device to be measured.
    2. Measure AC current flowing into the device.
    3. Calculate Z=V/I

    Actually that will allow you to measure impedance not just resistance. If you just want resistance as you asked use an ohm meter.
     
  5. bcassidy9

    Thread Starter New Member

    Nov 27, 2012
    5
    0
    Sorry about that.. It is a transformer. And no, I meant to write impedance!

    I could also sweep it and look at the transfer function of the impedance, correct? I guess I wasn't really thinking when I asked this question.
     
  6. #12

    Expert

    Nov 30, 2010
    16,284
    6,797
    That happens so often that we're not surprised.
    Take a few minutes and sort out your needs.
     
  7. studiot

    AAC Fanatic!

    Nov 9, 2007
    5,005
    513
    They usually are.
    But you still didn't specify frequency.
    Audio? Radio? Microwave?

    Excellent advice!
     
Loading...