• State
  • Locked Locked
  • Replies 2 replies
  • Subscribers 83 subscribers
  • Views 612 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.

FOC Sensorless in f28335

nicolasapicco
Prodigy 150 points

Hi all!

I am working with the TI example of FOC for an ACI motor. Has someone made any kind of analysis of the flux estimator?
I am testing speed reversal and the  behavoir near zero speed is really bad. I tried with differents values for Kp and Ki (Ireduced them) but not better response.

If someone has dealt with this problem, information is welcome!

  • 0
    Prodigy 150 points

    Nobody tried the Sensorless FOC? I'd really appreciate to exchange some experiencies working with the example project.

    Thanks!!

  • 0 in reply to nicolasapicco
    Prodigy 50 points

    Hi Nicol,

    I've already made experiment on ACIM with sensored and sensorless control. I had same situation to you. My sensored control is successful. However, sensorless control didn't work at low speed. Although in high speed it worked well. First, I checked the motor parameters (Rs, Rr, Ls, Lr,...) matched with my hardware or not. Because, the IFOC (sensored control) is not sensitive with motor parameter but DFOC (sensorless control) is sensitive with motor parameter. After checking the parameter, I changed the PI gain in flux estimator. I reduced the Kp and Ki gain then the motor worked well at low speed (50 RPM).