Originally Posted by
Roelof
I did a small test (not yet on a car) and made a capacitor bank from ceramic capacitors. The bank contains 9x 100uF-16v ceramic capacitors, these are not polarity sensitive. Why 9? Looks close to 2x 470uF normally used.
At work we have a capacity with ESR meter and the capacity is 870uF and the ESR is 27mOhm ! I looked in the specs of a normal 470uF capacitor which is used on the Euro spec Fleta ESC, the normal has an ESR of 220mOhm and a low ESR has 170mOhm (not measured but based on some specs I found).
I will give it to someone to give it a try, I highly doubt he will notice a thing but maybe a cooler ESC and a much easier mounting.
On the pic a comparisation of the size of 2 made banks compared with a 470uF capacitor.
you have try to assemble more ceramic capacitors ? and you have tested the result?
i think the best advantage is the low esc temperature therefore more efficient . Also i have see that many rc manufacturer use cheap capacitors for assemble power bank , i have order 680uf 16v Panasonic
EEEFP1C681AP low esr instead of 470uf and i want assemble a bank with three of these.