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MC Observer + Cordic

ktim
Visitor

‎2024-10-01 12:00 AM - last edited on ‎2024-10-01 09:25 AM by

I am trying to operate an 8-pole pair 48V PMSM motor with

  • STEVAL-CTM009V1
  • IHM09M2
  • Nucleo-G431RB


Sensorless with Observer + Cordic. I have run a motor profile with EVALSTDRIVE101. I have entered the parameters for the motor in MC Workbench 6.3.1. I have set the Startup Rev-Up procedure and it starts most of the time, but when it switches from Rev-Up to Observer (Start to RUN) the motor does not turn further. It starts to wobble between two coils.

The motor is in free rotation without a load.

Can someone give me a hint on what i have to change?

Thanks in advance

 

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cedric H
ST Employee

‎2024-10-01 09:12 AM

Hello @ktim ,

If your motor ran smoothly during the profiling, I would advise you to use the STO-PLL instead of STO-CORDIC. It is the one used when you configure your project to generate the profiler binary.

Regards

Cedric

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