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IGBT gate drive

Discussion in 'Electrical Engineering' started by James Sweet, Aug 9, 2009.

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  1. James Sweet

    James Sweet Guest

    I have a Fuji 6MBI100UB-120 IGBT 6 pack that I'm looking to use for some
    motor drive experiments. This is my own personal project and not
    something that will ever go into production so I'm not terribly
    concerned with getting the BOM cost to the absolute minimum. It seems
    gate drive is a deceivingly complex subject and good information on
    calculating the requirements is hard to come by. Assuming a 3 phase
    bridge configuration, 340V DC rail (so 600V ICs should be adequate) and
    a PWM frequency somewhere in the range of 12-20 kHz, what approach would
    you guys take? Can I get away with something as simple as one of the
    many bootstrap high/low driver ICs, or am I going to need to go with
    something more complex like optocouplers with DC-DC converters supplying
    the floating gate drive voltage? I'd like to avoid messing with gate
    drive transformers if possible, magnetics are where I'm least
    knowledgeable. I've used the NCP5111 from On Semi for driving small
    mosfet bridges with success but I gather this is not gonna cut it for
    such large IGBTs.
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