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Homework Help: Halfwave rectifier

  1. Sep 22, 2010 #1
    1. The problem statement, all variables and given/known data
    How to find the input power factor(PF) and total harmonic distortion (THM) of a halfwave rectifier with a free wheeling diode, ripple free load current, and transformer turns ratio of 1?

    2. Relevant equations
    PF = (Vs*Is*Cos(theta))/(Vs*Is)
    THD = [(Is/Is1)^2 - 1]^0.5
    Vs = transformer secondary rms voltage
    Is = transformer secondary rms current
    Is1 = fundamental of Is

    3. The attempt at a solution
    I get confused on finding the Is and Is one. other method of finding PF is using
    PF = Pac/VA where
    Pac = output rms power
    VS = transformer volt-ampere rating

    how do I solve this problem?
  2. jcsd
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