Full wave/ Half wave Rectification

Discussion in 'General Electronics Chat' started by DavS13, Jul 22, 2014.

  1. DavS13

    Thread Starter New Member

    Jun 16, 2014
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    What are the advantages/disadvantages of full wave rectification VS half wave rectification for AC to DC conversion?
     
  2. alfacliff

    Well-Known Member

    Dec 13, 2013
    2,449
    428
    advantage of full wave recitficaaion, less ripple. advantage of half wave, lower part count.
     
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  3. MaxHeadRoom

    Expert

    Jul 18, 2013
    10,553
    2,375
    Half wave, as its name implies, only rectifies one half of the supply sine wave, whereas full wave results in both halves of one cycle being utilized. The full wave results in a higher energy content.
    Max.
     
  4. DerStrom8

    Well-Known Member

    Feb 20, 2011
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    half wave rectification clips the negative cycle completely, causing the output to be at 0 volts for half of each cycle. Full wave rectification flips the negative side of the sine wave to the positive side. Full wave rectification is less wasteful.

    Here you can see what we are referring to:

    [​IMG]

    The capacitors that are often added on after a rectifier are to smooth the signal to make it look more like a constant DC voltage.
     
  5. crutschow

    Expert

    Mar 14, 2008
    13,022
    3,235
    Another consideration is that, if rectifying a power transformer output, a half-wave rectifier has a DC current component which can saturate the transformer core and cause high transformer primary currents and transformer overheating, so the transformer must be significantly derated for use with a half-wave rectifier.
     
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