IGBT Half Bridge DC link capacitor selection criteria

Discussion in 'The Projects Forum' started by k2n2a2, Jan 25, 2013.

  1. k2n2a2

    Thread Starter Member

    Jul 16, 2012

    I am building an IGBT half bridge that will be used to switch between two voltage supplies as shown in the schematic
    Do I need a DC link capacitors?
    if I do, where do I place them?
    is that the same as DC filter capacitors, or the DC link capacitors are something different?
    what values should I use?

    application info: Positive supply:10VDC
    negative supply: -800VDC
    Load current: 20A max
    Frequency: 30kHz

    I also attached the datasheet for the IGBT i am using