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Current through a voltage multiplier

Discussion in 'Electronic Basics' started by Roger Dewhurst, Jan 8, 2006.

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  1. How, if at all, does the capacitor size influence the current flow through a
    voltage multiplier?

    R
     
  2. Pooh Bear

    Pooh Bear Guest

    The 'Cockcroft' type ?

    Bigger Cs will reduce their impedance but eventually it's D.C. load current that
    determines the A.C. current. Larger Cs will 'regulate' better of course.

    Graham
     
  3. Larger capacitors hold their peak voltage better till the next pulse
    than smaller ones do at the same load current, so the charging current
    changes from a low value long pulse (as a smaller cap charges back up
    to peak voltage) to a higher value, shorter pulse (as the larger cap
    charges back less voltage to its peak). In other words, the larger
    the caps, the smaller part of the total voltage wave contributes to
    the charging process, so the magnitude of the current has to be higher
    during those shorter times, to transfer the same average current.
    This applies to all capacitor input filters, not just those in
    voltage multipliers.
     
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