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Omer Ab
Associate II
February 5, 2025
Question

ACIM MOTOR SPEED CANNOT INCREASE

  • February 5, 2025
  • 13 replies
  • 1774 views

 

I can't increase the motor speed beyond a certain point.

For example, when using the ST Motor Pilot interface, I set the Speed Reference variable to 2500 RPM, and the Mechanical Speed reaches approximately the same value (2495 RPM). However, when I increase the Speed Reference beyond 2500 RPM, the Mechanical Speed does not increase and remains the same.

MCU: STM32G431RB
Power Board: STEVAL-IHM023V3

NOT :I increased the motor's nominal current using MC Workbench, but I didn't notice any change in speed.

[VERSION]: MCSDK6.3.2 (latest version for all tools)
[TOOL]: MC WB
[DETAILS]: See above.
[EXPECTED BEHAVIOR]: Increase in motor speed
[HOW TO REPRODUCE]: See above.

Best regards.

13 replies

Omer Ab
Omer AbAuthor
Associate II
July 17, 2025

@STuser2 
Good luck, is there really no solution at all?
If you're not going to respond or provide any help, then what’s the purpose of this community? Just to sit there and ignore people?

Senior III
July 17, 2025

Yes surely for higher RPMs you have to try field weakening.

Omer Ab
Omer AbAuthor
Associate II
July 17, 2025

@STuser2 @unknown 

Alright, but how exactly do I apply field weakening?