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Voltage regulation under a capacitive load.

  1. Nov 12, 2008 #1
    1. The problem statement, all variables and given/known data

    Why does the voltage regulation of a transformer become negative when a capacitive load is attached? It causes the voltage across the secondary winding to increases rather than decrease, as would be the case for a resistive load. But why?

    2. Relevant equations

    Regulation = (Vn-V)/Vn

    where Vn is the voltage at no load

    3. The attempt at a solution

    As I understand it, the capacitance is obviously reactive and consumes no power, instead it reflects the power back to the source, and this results in an oscillation of power.

    I'm probably missing something obvious here, but the negative voltage regulation can't be due to the returning power from the capacitance increasing the voltage?
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
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