effect of voltage in eddy current loss

Discussion in 'General Electronics Chat' started by ujjwal agarwal, Apr 23, 2015.

  1. ujjwal agarwal

    Thread Starter New Member

    Apr 23, 2015
    6
    0
    It is seen that on increasing the frequency .. while keeping voltage constant..
    The eddy losses doesnt change..
    Cn neone hlp me with ds??
     
  2. Ramussons

    Active Member

    May 3, 2013
    557
    92
    Wrong.
     
  3. cabraham

    Member

    Oct 29, 2011
    82
    30
    Eddy current should stay constant as you described. If frequency increases while voltage stays constant, the flux will decrease. The volts per turn for any winding, and for the core material where eddy currents take place, will remain constant. The induced volts per turn equals -d(phi)/dt. Or in the frequency domain, -(phi)*omega. Frequency omega increases and flux phi decreases by the same ratio. Thus the volts per turn remain constant.

    In reality. the losses should increase a little because cores wound from tape or using stacked laminations are designed so that thinner laminations/tape are used at higher frequency. This reduces eddy current losses. I would expect a small increase in eddy current losses using the above scenario. Did I help?

    Claude
     
    Last edited: Apr 29, 2015
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  4. ujjwal agarwal

    Thread Starter New Member

    Apr 23, 2015
    6
    0
    this was helpful. i didnt think in the frequency domain.
    thanks
     
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