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TMS320F28027: Rs-online Recalibration

Joe Wen
Prodigy 10 points

Part Number: TMS320F28027

I'd like to use the Rs online feature as over temperature protection, but I want to know how the recalibration is done by injecting a D-axis current. What is the theory in physics or in math? What is the relation between Rs online and temperature? I had contacted with your FAE or someone, but he just said there is no equation for the recalibration because it's done with something called incremental conductive method. I asked for further information about that method or something like a flowchart, but he returned nothing. Please help, thanks.

  • 0
    TI__Guru* 95315 points

    Sorry I do not understand your question. Please provide some context/reference to your question. If your question pertains to some document, provide the literature number. If it pertains to some software library, provide its name, version number etc.

  • 0 in reply to Hareesh Janakiraman
    Prodigy 10 points

    I was reading a document named Insta_SPIN, literature number: SPRUHJ1H. It mentioned a feature called Rs online which is related to stator coil temperature and presents the stator resistance when the motor is spinning. In the document, it simply said the recalibration is done by injecting a D-axis current into the stator coil. What I 'd like to know are how the driver IC knows the Rs online and how the recalibration is done in detail.

  • 0 in reply to Joe Wen
    TI__Guru** 117160 points

    The detailed description of Rs online calibration can be found in Chapter Rs Online Recalibration in Instaspin User's guide (SPRUHJ1H), which is the full material we can provide to you.