Full bridge igbt

Discussion in 'General Electronics Chat' started by TAKYMOUNIR, Feb 22, 2013.

  1. TAKYMOUNIR

    Thread Starter Active Member

    Jun 23, 2008
    351
    1
    In the full bridge circuit or in any bridge why when the load is more capacitive than inductance the reverse recovery time for igbt is worse but if more inductive is better
     
  2. GopherT

    AAC Fanatic!

    Nov 23, 2012
    5,984
    3,725
    I never taught about it before but a capacitive load quickly accepts current and voltage trails as the plates of the capacitor charge.

    In an inductive load, the quick application of voltage causes high inductive reactance (~resistance) so charge trails voltage.

    This means, electrons quickly move into a capacitive load and take time to leave the capacitive surfaces.

    The inductive load, the interesting thing is that, as one path of the bridge is rapidly closed, an inductive kickback starts as the magnetic field collapses. This actually helps drive the circuit as the second route of the HBridge is opened.

    It is early in the morning - I hope I am making sense.
     
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