Associate III

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Where are the pins for measuring back emf when configured in the Motor SDK?

Forum|Forum|4 years ago
August 29, 2021
2 replies
1136 views

Hello, I am using a B-G431B-ESC1 board and want to set up my motor with speed control via back emf in MotorControl Workbench 5.4.7 or 5.Y.2 (I checked both there and there). On the board, these are pins PA4, PC4, PB11 and PB5, but I don't see this initialized in the SDK. In the speed sensing section, I have sensor-less (Observer + PLL) installed.

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Best answer by cedric H

Hello,

The MC SDK is dedicated to FOC algo. Our FOC algo does not use back emf sensing, this is why the back emf pins are not initialized.

As the board is also 6steps compatible, everything is ready to do speed control via back emf sensing, but this configuration is not developed yet.

Regards

Cedric

Guru

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https://community.st.com/s/question/0D53W000012PbqcSAC/where-are-the-pins-for-measuring-back-emf-when-configured-in-the-motor-sdk

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Technical Moderator

Hello,

The MC SDK is dedicated to FOC algo. Our FOC algo does not use back emf sensing, this is why the back emf pins are not initialized.

As the board is also 6steps compatible, everything is ready to do speed control via back emf sensing, but this configuration is not developed yet.

Regards

Cedric

Associate III

Thanks a lot! I understood everything, I just did not take into account that back emf is not used with FOC.

If 6-step control comes up it would be great.