integration of Back-emf method for Sensorless BLDC

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integration of Back-emf method for Sensorless BLDC

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shey_alex
Contributor II

Hi,

I have a question regarding the BACK-EMF integration method for sensorless control of BLDC. 

How does the threshold value (V_thres) to trigger the commutation is usually calculated? Is it based on the motor parameters or it's trial and error procedure? I haven't found any explanation in application notes about this issue.

Thank you for your answer!

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pachamatej
NXP Employee
NXP Employee

Hello,

have you checked the following AN?

https://www.nxp.com/docs/en/application-note/AN4597.pdf

Please let us know if you need further guidance.

Best regards,

Matej

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