Hi again! 
Another doubt on the same project...
As I'm going further in my digital control of this bldc motor, I want to control torque. The unit's control already has it's max torque/current allowed, but I want to do the opposite. I want to be able to decrease it's torque until a min.
So I thought on using a current sensor, and based on it's readings I could stop the motor by the pwm-rc-filter already done...
My problem is... Where can I measure this current? Can i wire this sensor
https://www.ebay.com/itm/281683077478
Into one of the three phases of the motor? Is the current the same for all phases, and the value read on one of them means the current being used by the motor? As the power requirements for the whole set-up are 4A, I chose a 5A current sensor.
Thanks again!