Quote:
Originally Posted by MPaulHolmes
They are 4uF 250v (tiny, huh! But they look huge!). Their esr is very small, and they are excellent at absorbing voltage spikes. I don't know why they increase the ripple current so much. Maybe because they smooth out the spikes, it makes it easier on the aluminum electrolytic caps.
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Wow that's impressive for such a small uF.
Something I am confused by; I would think that ESR and ripple capacity would directly correlate to each other for the same ratings on voltage and MFD capacity, but looking at numerous data sheets, it seems that they don't?
I must be missing something here.
I think you are right though about the spikes, I think that these are better suited to handle squelching the high frequency harmonic ringing from switching, and the higher capacity aluminum caps are better suited for smoothing the ripple from the root switching frequency.
Now I am rethinking about my capacitor order for my set up.
I am curious, is there a guide line for a ratio between controller current capacity and its capacitor bank ripple capacity and it's total MFD capacity? th would be so helpful.
I have a felling that I am going over board on MFD capacity and maybe a little low on ripple capacity.