Diode Current in CW multiplier

Discussion in 'General Electronics Chat' started by thingmaker3, Mar 7, 2006.

  1. thingmaker3

    Thread Starter Retired Moderator

    May 16, 2005
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    I know how to calculate the voltage drop of a Cockroft Walton multiplier, and how to estimate output voltage. I know that voltage ratings of the capacitors and diodes must be a minimum of 2x the input peak voltage.

    What I have trouble finding is the ammount of current that goes through the diodes. Does the same ammount of current go through each diode? Does more current go through the diodes in the lower stages?

    I am interested in both the half wave and full wave CWs.
     
  2. beenthere

    Retired Moderator

    Apr 20, 2004
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    Hi,

    Don't know for sure, but the nature of the beast suggests that all diodes conduct similarly. To pass enough charge to float up each capacitor means that equal charges has to pass each diode.
     
  3. n9352527

    AAC Fanatic!

    Oct 14, 2005
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    The difference would be minimal and mainly associated with stage losses. In the case of perfect components, where there is no loss whatsoever, the currents would be equal.
     
  4. thingmaker3

    Thread Starter Retired Moderator

    May 16, 2005
    5,072
    6
    So... is doide current in each stage equal to output current?
     
  5. HVFan

    New Member

    Mar 15, 2006
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  6. thingmaker3

    Thread Starter Retired Moderator

    May 16, 2005
    5,072
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    Thank you, HVFan. I am familiar with the Blaze Labs site and have already run the math on a spreadsheet. I had somehow missed the java calculator though.

    I am curios about diode current. What is the value for Id1? For Id2? Is it equal to load current? Blaze Labs text says "equal to the diode's rated current" but I can't make sense of that...
     
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