Andre Luiz de Oliveira

CAPACITORS ON BOARD CONTROL ENGINE

Discussion created by Andre Luiz de Oliveira on May 17, 2018

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?

 

Best Regards

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