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MCT8316A: Settings for operating in a closed loop

Conor
Guru 12235 points
Part Number: MCT8316A

Hi,

What are the roles of "OL_DUTY" and "OL_ILIMIT" in the "MOTOR_STARTUP2" register?

Also, do I need to set the CONST_SPEED register to CLOSED_LOOP_MODE when operating in a closed loop? Please let me know if there are any other register settings required to operate in a closed loop.

Thanks,

Astro

  • 0
    TI__Mastermind 24415 points

    Hi Astro,

    Thanks for posting your question in MD forum. OL_DUTY sets the input speed duty cycle limit in open loop operation. OL_ILIMIT sets the current limit in open loop operation. For example, if the application requires very high starting torque or very fast acceleration, we recommend to set these two parameters to higher values. 

    You set the CLOSED_LOOP_MODE to CONST_SPEED only if you wish to enable the speed loop. In this mode, device regulates the motor output speed. For example, if you set the MAX_SPEED to 1000 Hz and PWM duty cycle to 100%, motor will spin at 1000 Hz even if the load on the motor changes.  

    Regards,

    Vishnu

  • 0 in reply to Vishnu Balaraj
    TI__Mastermind 26046 points

    Hi Astro,

    Do you need assistance still? If not, please mark as Resolved. 

    Thanks,
    Aaron