Need help with Full wave bridge rectifier circuit

Discussion in 'Homework Help' started by alialiali, Dec 13, 2008.

  1. alialiali

    Thread Starter Member

    Dec 12, 2008
    26
    0
    Hi every one please can any one answer the following quation

    1. Plot the waveshapes for the secondary voltage, the output voltage and the diode
    currents.
    2. Once again vary the load resistance and observe and record the effect of this variation
    on the waveforms.
    Comment on the following:-
    1. Why would the same value of reservoir capacitor used in this circuit, reduce the
    output ripple voltage more than it would if used in the half wave circuit.
    3. Increase the value of the reservoir capacitor to 10000uF and observe the effect on the
    output voltage and the diode current. [You will need to increase the simulation time to
    see the effects properly –do this from the Simulator-Choose Analysis menu].

    I am uesing SIMetrixIntro550 to run this circt

     
  2. bertus

    Administrator

    Apr 5, 2008
    15,638
    2,344
    Hello,

    Take a look at this page of the AAC eBook:
    http://www.allaboutcircuits.com/vol_3/chpt_3/4.html

    As you see alway two diodes are conducting (so they carry the same current).
    When you enlarge the buffer capacity the time for charging the capacitor gets shorter resulting in larger currents through the diodes.

    Greetings,
    Bertus
     
  3. Wendy

    Moderator

    Mar 24, 2008
    20,764
    2,534
    Break it down, let us know what you think the answers are, then we'll go through them.
     
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