2018-08-19 09:09 AM
Hello dear STM community family,
I have been trying to develop bldc motor controller for some weeks
In motor control sdk, I want to use 3 shunt current sensing method.
I don't want to add shunt resistor more in hardware to read battery current.
Could anyone tell me how to read battery current from 3 shunt resistors ? (low side 3 shunt current reading topology)
I don't want to mix motor current and battery current.
Would it be correct to find battery current if I add 3 shunt resistors readings to each other ? Any other constant or formula is involved in finding battery current ? ( such as electrical angle, phase current rms etc... )
for a couple of days, I haven't been able to sleep properly because of thinking about this question.
I need Help PLEASE.
I appreciate anyone's answer and time.
Thank you so much...
2018-08-19 11:50 AM
I may need duty cycle of each phase to find the dc current
Could anyone tell me please how to obtain duty cycle from the software ? (firmware)
Thanks a lot...