regulation in diode

Discussion in 'General Electronics Chat' started by manojkumar92, Sep 11, 2011.

  1. manojkumar92

    Thread Starter New Member

    Sep 11, 2011
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    what is difference in voltage regulation in half& full wave rectifiers?


    or these are same for both
     
  2. #12

    Expert

    Nov 30, 2010
    16,247
    6,744
    The first answer is that rectifiers are not regulators. Rectifiers make no attempt to regulate voltage.

    The second answer is that a full wave rectifier will require half the capacitance to reduce voltage sag between power pulses, compared to a half wave rectifier.
     
  3. Adjuster

    Well-Known Member

    Dec 26, 2010
    2,147
    300
    The word "regulation" in this context refers to the variation of output voltage with load current. This term is also applied to transformers. http://www.allaboutcircuits.com/vol_2/chpt_9/6.html

    Typically for a given value of reservoir capacitance full-wave rectifiers give better regulation than half-wave, because the ripple sag time is approximately halved.

    A bridge (Graetz) rectifier however has two diodes in the path instead of one for the half-wave type, so the rectifier drop can be larger, although this is somewhat offset by the fact that only half the mean current passes through any one diode.
     
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