Quick Diode Question

Discussion in 'Homework Help' started by Joepiper5, Aug 4, 2011.

  1. Joepiper5

    Thread Starter New Member

    Aug 3, 2011
    7
    0
    OK so im lost with a problem im working on using diodes.

    The problem branches off a previous problem that i solved which stated
    -a full wave rectifier with a vrms of 120v. the average full wave rectified voltage is 12v.

    -The diode has changed to a half wave rectifier with a vrms of 20v. I need to find the average dc voltage.

    Im not sure if the problem is missing something or if i need to work back from the average full wave rectified voltage to try to find the half wave rectified voltage.

    Any insight would be great.
    Thanks
     
  2. mik3

    Senior Member

    Feb 4, 2008
    4,846
    63
    Integrate the rectified waveform over one period and then divide by the period to find the average.
     
  3. Joepiper5

    Thread Starter New Member

    Aug 3, 2011
    7
    0
    im trying to figure out what you mean by the rectified wave form. any way you could express it a little bit more?? Im not sure how to find the period either, theres little to no information in the useless book were using.
    Thanks
     
    Last edited: Aug 4, 2011
  4. Adjuster

    Well-Known Member

    Dec 26, 2010
    2,147
    300
    You want to know the time-averaged value of the rectifier output voltage, so you will want to study the waveform of its voltage versus time.

    To get a representative sample, you measure the voltage integrated over a whole cycle, the period of which is the reciprocal of the frequency. A look at this page on waveforms may help you/.

    http://www.electronics-tutorials.ws/waveforms/waveforms.html
     
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