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Using DRV8308 for precise maintenance speed

Other Parts Discussed in Thread: DRV8308, DRV8308EVM

Hello. Thank you your answer’s. Your answer’s helps.

My task is to provide high-repeatability precision keeping one instantaneous speed = 3000 ob/min brushless DC motor; on shaft of motor is big moment of inertia for smoothing rippling of speed; load is ventilation; brushless DC motor Maxon 118889(no-load speed 11000 ob/min, number of pair poles = 2); acceleration is smooth (1minute – 3000 ob/min); brake action is running-out; reverse is not necessary. Is it possible on DRV8308? Is it possible to check on Kits DRV8308EVM? What system is it do (open-loop or close-loop)? What mode task of speed is use (open-loop PWM, close-loop, speed register)? If this task doesn’t solve on DRV8308, recommend your microchip which to solve this task.

  • Hi Aleksei,

    Our DRV8308 is designed to keep good speed control of BLDC. I think it will be just fit for your application. Also it has great ability to be optimized for the application needs. either open (PWM input mode) or close loop (CLK input mode) can be achieved with DRV8308.

    The EVM and the following reference design will be good for you.
    www.ti.com/.../TIDA-00197

    Best regards,