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Homework Help: Do you have to refer core losses in equivalent circuit?

  1. Mar 31, 2014 #1
    Hi, I'm currently writing a lab report on single phase transformers and I need to determine the equivalent circuit with respect to the secondary side. I have already found the parameters with respect to the primary side so it is just a matter of referring them to the secondary side. What I would like to know is whether the core losses (Ro and (Xm) have to be referred as well and why.

    I think they should be referred because they are a function of the current which would change depending on if it's in the primary or secondary side.....right? :confused:
    However, I'm not 100% sure so can someone tell me if I'm right or wrong in thinking this way please?

    Thanks in advance :smile:
    Last edited: Mar 31, 2014
  2. jcsd
  3. Mar 31, 2014 #2


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    Gold Member

    core losses xm and ro can be modeled as a resistor and an inductor both in parallel with the primary coil.

    In a lab report it would be very good to refer to them as it would demonstrate understanding of the system as well as an understand of non ideal effects.
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