Motor Profiler stalled at 28%, but can startup ok in a normal project

[Dougle]

Hello, I'm using an RC car BLDC motor with an EVLSERVO1 evaluation board and can't complete the Motor Profiler process.  My application has a large mass on the motor, so I need the mechanical model to get better control loop parameters.  I have manually measured the electrical model and have successfully done the following:

1. Run the motor open loop in voltage mode
2. Run the motor open loop in current mode
3. Manually determined a start-up ramp profile in open loop
4. Started up with speed control with my start-up ramp.
5. Used the same MCSDK project with open loop disabled and motor profile enabled to generate a motor profile project with known good motor electrical model and start-up ramp.

Despite this, I see no change in behavior during the motor profile process when compared to the default project.  I have used the startup speed as my max speed, lower, and higher.  I have changed the max current to the same as my start-up profile and to the max the board can handle.  No luck.

I am using the following versions:

• ST Motor Pilot V6.4.1
• Motor Control Workbench Version: 6.4.1 Build: 250722.074358
• STM32CubeMX V6.15.0
• VS code with STM32CubeIDE for VS code version 3.6.4

Any help or tips would be greatly appreciated!  Let me know if there is any other information I can provide! 

[Gael A]

Hello Dougle,

To reconstruct your custom speed ramp with a Profiler project, you need the following insight :
- Your target speed is 40% of the Profiler's GUI Nominal Speed
- Your acceleration starts at 500 rpm/s, and is divided by 2 every failed attempt (in case the motor doesn't move, which I believe should be your case given the load on the shaft)
- The duration time of the revup is TargetSpeed[rpm] / Acceleration[rpm/s]
- The current target is the one used for Rs estimation. It should be enough to make the motor run since it was able to align it.