DC link capacitor

Discussion in 'General Electronics Chat' started by khalid4145, Nov 7, 2008.

  1. khalid4145

    Thread Starter Member

    Jul 22, 2008
    Hi guys,,,

    I am building a multilevel dc/dc converter with has four input power supplies each one of them is 30V total of 120V drawn a maximum load current for resistive load of 10A. i want to use a dc link capacitor across each power supply. my questions are:

    1- why dc link capacitor important?

    2- is it important in my application?

    3- how do i choose a suitable value? which is better 100uf or 33000 uf?? or other values?

    please advice
  2. mik3

    Senior Member

    Feb 4, 2008
    Post a schematic if possible and tell us for what you will use it and its power ratings.
  3. beenthere

    Retired Moderator

    Apr 20, 2004
    It depends on the frequency of your converter. The capacitor supplies energy during the time the converter is not active. It is absolutely vital to the application.

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