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DRV10970: Torque Control

Part Number: DRV10970

Hi,

Is it possible to apply the torque control to DRV10970 by disabling the motor lock detect feature ?

Best regards,
Kato

  • Hey Kato,

    I'm not sure I understand what torque control means in context of the motor lock detect feature.

    When I think torque control, I think of a torque loop that can take feedback from the motor current and estimate some behavior about the torque on the shaft of the motor. Unfortunately, this device (and all devices at TI at the moment) do not have this functionality integrated into the chip. As a result, the customer would have to do this externally in some other form.

    Lock detect simply looks if the hall sensors have toggled for some amount of time. If they have not toggled, the device will stop driving the motor. As a result, disabling the lock functionality would result in the device trying to drive the motor even though the hall sensors are not toggling. I don't see a benefit, in fact, I see potential risks to the motor and driver, but hopefully answered your question.

    With that said, I would have to go on the bench and see if there is a way to actually remove the lock functionality from the device. I suspect, I could do something to the retry capactior to shorten the time to exit the lock which would effectively disable the lock functionality.

    Best,

    -Cole

  • Hi Cole-san,

    Thank you for the explanation.

    I understood and will discuss that with our customer, so I will contact you if I get additional questions from him.

    Best regards,
    Kato