Ever board to control BLDC or PMSM motor, have three capacitors in paralel.
I did not understand their work, I noticed they always capacitance of 220uF and are polarized.....
I will change the capacitors because I working now in a version custom.
This capacitors are in green on image
My main doubts are:
1) What are these capacitors for in circuits ???
2) How do I calculate capacitance according to my custom circuit?
3) What is influence ESR from on board?