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Can I use DRV10975 for robotics?

Georg Seema
Prodigy 20 points
Other Parts Discussed in Thread: DRV10975, DRV10983

I'm building a line following robot with brushless gimbal motors. I was wondering If I could use DRV10975 to control the motors?

Motor Specs:
Kv(RPM/V): 340Kv
Lipo Cells: 2~3S 
Max Power: 5W
Max Amps: 0.5A
No Load Current: 0.01A
Internal Resistance: 10ohms
Diameter: 22mm
Length: 15.6mm
Weight: 20g

  • 0
    TI__Guru** 114905 points
    Hi Georg,

    Our experts have been contacted.

    They will confirm this, but I think the DRV10975 will not work in this application. The DRV10975 and DRV10983 are designed for closed loop applications. The gimbal is an open loop system.
  • 0 in reply to Rick Duncan
    TI__Intellectual 1555 points
    DRV10975 uses open loop start up which means you will not get motor position & feedback until it reaches sufficient RPM. If this is ok in your application. I don't see any reason not.
  • 0 in reply to Seil Oh
    Prodigy 20 points

    Well I wont need any motor position feedback. I will only need to be able to change the speed and direction of the motors and the changes have to happen quickly.  Hobby ESC' can operate around 500hz input speed. I'm hoping to get similar or even faster speeds.

    What I2C communication speed does this chip use?

  • 0 in reply to Georg Seema
    TI__Expert 3010 points

    Refer section '10.2.1 Design Requirements' on datasheet for recommeded application range. It says you can go upto 1000 Hz closed operating speed. If your motor spec and application falls within the range you should be able to use DRV10975

    -- Krushal

     

  • 0 in reply to Krushal
    TI__Mastermind 26065 points
    I think the 500Hz input speed means the speed change command will update with 500Hz sampling rate. If running for the same direction, I think DRV10975 will reponse to the command change. But if runing Bi-direction quickly for position fuction. The open loop transition/DIR changing will not response to that quick inputs.

    Best regards,