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DRV10983: DRV10983 for positioning application

Vikram Kopuri
Prodigy 30 points
Part Number: DRV10983

Hi I'm considering using DRV10983 for a positioning application. To drive a motorized XY sample holder on a microscope to move sample around for imaging. 

I mostly find the DRV109xx family used in application like fan and hard disks, where the motor is spinning at constant speed and same direction. In my application however motor is spinning for relatively small period of time , with speed and direction constantly being changed by a PID controller. 

In the past , I've been advised sensorless drivers aren't suited for my application , because  these drivers rely on back emf is used to make commutation which require the motor spinning at high speeds.Where as in my application motor isn't spinning at high speed most of the time, and there is a lot of starting and stopping. 

  • 0
    TI__Expert 6065 points
    Hey vikram,

    A short answer would be that using DRV10983 in a position application would be either difficult or not possible, and we haven't done it before.
    For accurate motor position, I would recommend looking at TI's stepper motor drivers. (www.ti.com/.../overview.html)

    However, I will try entertaining the idea of using DRV10983 at a very high level below.



    1) If the position motor has a low mechanical load and can spin up quickly, or if the movement resolution doesn't need to be that high, drv10983 should work.
    2) The drv10983 has initial position detection (IPD) to be able to start from standstill, instead of having to align and go, which would mess up the positioning.
    3) Dir pin can be used to change direction
    4) To stop suddenly, there is a brake function that won't stop the motor immediately, but will either align the motor to a certain position or ground all the motor phases to brake it that way.

    Let me know if you need any more help or if you need something explored further.
  • 0 in reply to Sanmesh Udhayakumar
    Prodigy 30 points

    Thanks Sanmesh for the prompt rely, exactly what I wanted to know. Its hard to do positioning drivers without hall sensors. Only driver I came across that could do that is Elmo's Whistle , I can substitute hall sensors for a Quadrature encoder instead, however integrating that into our system is hard. DRV109xx has a much nicer interface. 

    Thanks for the answer.