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DRV8312 evaluation board with RM46/RM48 control card?

Jared Allen
Intellectual 450 points
Other Parts Discussed in Thread: DRV8301, DRV8312, CONTROLSUITE

I have been running my DRV8312 eval board with the F28035 controlCARD (basically, using the DRV8312-C2-KIT).  Is it possible to use the Hercules RM46X or RM48X controlCARD with the DRV8312 motor driver board? I know the card should physically mount to the board, but I'm wondering if it will function correctly.  I know the software will be completely different, but I prefer the DRV8312 kit to the DRV8301 kit for my low power motor application.

I appreciate any feedback.  Thanks.

  • 0
    TI__Guru 59540 points

    Hi Jared,

    I forwarded your post to our motor control expert and you should hear from them on your question shortly.

  • 0
    TI__Genius 13810 points

    From hardware viewpoint, RM48 may have a power problem because it seeks current from the mother board and the DRV8312 can only provide less than 500mA for everying operating at 5v. RM46 is fine because we provide seperated power to the control card anyway.

    From software viewpoint, we don't have the example today. So, you have to modify the existing DRV8301 project for the interfaces - like the ADC channels and PWMRST channels (if you drive it from the control card to the DRV8312.). The encoder interface and 3 PWMA inferface (no PWMB on DRV8312 but PWMRST) are compatable between dRV8312 and DRV8301.

    Regards,

    Haixiao

  • 0 in reply to Haixiao Weng
    TI__Genius 13810 points

    Sorry, one more thing you have to take care of:

    The motor in the DRV8312 is different from the motor used in our project. So, if you keep using the motor in the dRV8312 kit, you need to update the motor parameters.

    Haixiao

  • 0 in reply to Haixiao Weng
    Intellectual 450 points

    I'm using my own sensorless motor, and I've tweaked the InstaSPIN and FOC projects from the DRV8312-C2-KIT_v128 folder in controlSUITE to work for my motor.  I plan to do the same with a Hercules controlCARD.  It sounds like I should use the RM46.  Thank you for the response.