• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 82 subscribers
  • Views 224 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

LAUNCHXL-F28069M: Lab 4: Torque output

Harsh Songara
Intellectual 400 points

Part Number: LAUNCHXL-F28069M

Hello, with respect to the 4th lab in the instaspin labs, I suppose that when I run the motor on no-load and without a speed controller (as needed in the manual) I must see that with increase in IqRef_A commanded, there must be an increase in the output torque, ie., Torque_Nm. I'm using a supply that can provide 24V, 5A and my USER_MOTOR_MAX_CURRENT is set to 3 in the "user.h" file. 

However, for a single value of IqRef_A the Torque_Nm varies a lot. Although the motor visually seems like it is running ok. The values of IqRef_A for which these were observed were all below 3. Is this normal? 

Regards,
Harsh

  • 0
    TI__Guru** 117220 points

    The USER_MOTOR_MAX_CURRENT is used to set a limit on the maximum current command output of the provided Speed PI Controller to the Iq controller. Normally, the IqRef_A  is less than or equal to USER_MOTOR_MAX_CURRENT always if the speed closed-loop is enabled.