Hello. I am just starting in the world of motor control with ST parts and SW, so please be patient with me.
I have checked different motor control boards for BLDC, and some related documentation, and I found special interesting the AN5423.
https://www.st.com/content/ccc/resource/technical/document/application_note/group1/f4/ad/38/39/04/99/46/11/DM00666970/files/DM00666970.pdf/jcr:content/translations/en.DM00666970.pdf
In the application note, it is mentioned the benefits of using inline-phase current-sensing instead of low-side or high-side current-sensing.
I have checked some BLDC motor control boards that I have interested in using (X-NUCLEO-IHM16M1, X-NUCLEO-IHM07M1, STEVAL-LVLP01, and several more...) and I noticed that they are designed to use low-side current sensing (1 or 3 shunt resistors).
I would like to know:
1) Why do most of the boards use low-side current sensing?
What are the technical and cost related reasons for that?
How that affects the possible ST algorithms to use?
2) Can FOC work with inline-phase current sensing?
3) If it is possible to use ST algorithms with inline-phase current, what would we have to change in HW and SW to use it?
4) Can inline-phase current sensing be used for the algorithms described here: https://www.st.com/content/st_com/en/ecosystems/stm32-motor-control-ecosystem/stm32-zest-solution.html
(I also checked the STEVAL-LVLP01 board associated with this article, and also uses low-side current sensing).
