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Getting started with Design for stm32 Motor Control based solution

Question asked by Amrit Singh on Jun 11, 2018
Latest reply on Jun 14, 2018 by cedric Hottier

Hi!

 

I have recently moved from Cypress to ST, and might need help getting up and running here. 

 

My end goal is to build a sensorless (not necessarily FOC) motor controller for a 250W Motor for a high volume application.

 

My software setup is:  st4stm32, Xcube MC SDK, ST32 cube MX

 

My issue is with the hardware setup required for the sensorless control to work. The MCU, gate drivers and 6x FET setup is in place, but I cant figure out the feedback topology that is required for the MCSDK to work, i.e. does it need external OPamps to amplify the current shunt or does it need comparators that work with the virtual neutral & backemf lines to give a High/Low signal similar to hall sensors with a phase shift or something else ?

 

If someone can point me in the correct direction that would be of great help!

 

Kind note: My previous experiences have been with sensored applications, so I understand the commutation principles.

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