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DRV10987: DRV10987

Swapnil Urankar
Intellectual 275 points
Part Number: DRV10987

Hi ,

How to control speed regulation of motor . Which parameter is use to set good speed regulation .Currently  motor no load speed is  424 rpm & full load speed is 352 rpm  . 

  • 0
    TI__Mastermind 24405 points

    Hi Swapnil,

    Thanks for posting your question in MD forum. As you may know, DRV10987 does not have a feedback loop to control speed. When the load on the motor increases, the motor speed will naturally drop as there is no speed loop to sense the motor speed feedback and adjust PWM duty cycle. To improve Speed regulations due to load variations, it is recommended to use an external MCU to read the motor speed (FG) and implement a PI controller to adjust the duty cycle based on the error signal from the controller. Here is an app note that talks about implementing speed control using MSP430. 

    Regards,

    Vishnu.