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Thread: Gate x collector problem in IGBT

  1. #1
    Beginner Beginner Garbuli is on a distinguished road
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    Mar 2019
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    Gate x collector problem in IGBT

    Hello to all

    I had a problem with an inverter and i did not understand the problem:

    I have a inverter full bridge, input 125 Vcc and output 230 Vac 60 Hz 4 kVA, with insulation transformer.

    The operation frequency is 15 kHz and i used two IGBT FF200R12KT4 per channel.

    The gate driver is all discrete with a fast opto-coupler (i want to use a dedicated Infineon gate driver in the future), is a traditional circuit in my
    company and i need to use it. The power supply of the high side is a bootstrap circuit.

    But some inverters return for maintenance with the gate and collector of igbt in short circuit or with low resistance (about 10/20 ohms), in mostly cases
    the problem happens in the high side of IGBT.

    In the tests in production, everthing is ok, but the inverter is damaged in a short time of use by the consumer.

    What is the causes of this kind of problem in the gate/collector?

    Sincerelly

    Marcelo

  2. #2

    Infineon Employee
    Infineon Employee
    Giuseppe De Falco is on a distinguished road
    Join Date
    Feb 2020
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    11
    Hi Marcelo,
    I have moved the topic in the power modules section.

    Please wait for a feedback of colleagues from Power Modules.

    Regards,
    Giuseppe
    The views expressed here are my personal opinions, have not been reviewed or authorized by Infineon and do not necessarily represent the views of Infineon.

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