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Associate III
February 29, 2024
Solved

B-G431B-ESC1 Overcurrent

  • February 29, 2024
  • 11 replies
  • 12905 views

Hi everybody,

First of all I don't have experience in FOC.
I have profiled the motor, and the procedure was succesfully completed.
I use the motor profile to create a FOC project.
When I try to start the motor using the Motor Pilot an Overcurrent Error appen (in both mode speed and torque).
Now in normal motor drive the closed current loop regulate the 3-phases motor current by monitoring the current and comparing it to the setpoint created with torque reference respect
to the electrical motor angle, this means that if no short circuit is present, is not possible to get Overcurrent error.

Now in FOC the electrical angle before the motor start must be generated in some way that is not clear to me.

I try to change some paramiter as suggested in the help of Overcurrent error, but nothing change.
Any try give always Overcurrent error.

Using an osclilloscope to investigate, no current flow to the motor phases but systems give this error.

Board is ok because with 6 step methode everything work correct.

Can someone suggest something ?

Best answer by Gael A

Hello UniRob,

In the B-ESC-G431, the Overcurrent are generated using internal comparators linked to the Timer BKIN. Please make sure the threshold values are coherent, as well as polarity.
Please send me your .stwb6 project file so I can take a look and try to reproduce. Do you have any motor specification to share ?

11 replies

Gael A
ST Employee
March 10, 2025

Hello madhavP,

In order to maintain the forum's health and out of respect for the users that don't need to be updated on a closed subject, I advise you to create a new post explaining your issue in detail, with reference to the post(s) you previously checked. I also suggest to have a look at the How to write a Motor control post to get a response quickly post.
Thank you for your understanding.

If you agree with my answer, please consider accepting it by clicking on 'Accept as solution'.Hope this will help,Gaël A.