"The main idea is to get more samplesof the BEMF envelope within a PWM pulse instead of one sample.The captured samples are then used for modeling the relationship between BEMF voltage and sampling instances using a least squares (LSQ) method. LSQ method is a standard approach in linear regression analyses to approximate the oversampled (overdetermined) system."
The above technique is proposed using S12Z by MAREK STULRAJTERSYSTEM APPLICATION ENGINEER in FTF-AUT-N1806 - MAY 18, 2016
We would like to explore the same for low speed commutation. Is there any sample code which implements this which we can use to evaluate this for our project ?