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DRV8301-69M-Kit: Continuous current rating

Sandro Calligaro
Prodigy 30 points

Part Number: DRV8301-69M-KIT

Hi all,

I've found other threads dealing with the current rating of these two kits, but none of them solved the doubt on the real rating (thermal-wise).

Thanks in advance,

Sandro

  • 0
    TI__Guru** 116740 points
    Could you please have a more detail description on this question? Or which thread you means?
    Actually, these two kits use the same inverter board, the difference is the controlCard. It's a EVM board which shows the maximum current for reference algorithm evaluation.
  • 0 in reply to Yanming Luo
    Prodigy 30 points

    Thanks for your fast reply.

    I'm interested in the actual rating (continuous RMS and/or DC) current that the power-board can sustain.

    There is some confusion, with at least two recurring numbers in the web page and docs, i.e. 40 and 60 A, but I cannot find a document clearly stating the rating.

    It would also be interesting to know the maximum current rating (overload) and duration.

    The values related to scaling and software are not relevant, indeed, since the current rating is an purely hardware (I mean "power electronics", mostly thermally-related) issue.

  • 0 in reply to Sandro Calligaro
    TI__Guru** 119680 points
    for the InstaSPIN-FOC / -MOTION versions the external current circuits are designed to only measure 41.25A maximum.
    For the non InstaSPIN version it uses a separate set of circuits to measure around 60A maximum.

    from a thermal perspective we've had customers change the circuits and run 100A peaks.
  • 0 in reply to ChrisClearman
    Prodigy 30 points

    Thanks for the information, it clarifies, although it doesn't actually answer my question.

    I think it would be useful to provide users a "safe operating area", so they avoid melting their boards. :-)

    To me that is important for choosing the board to fit future needs. Anyway, TI doesn't offer higher current inverter kits, so I think I'll go for this one.