Re: Reservoir capacitors and ripple current.
Have a look at this. The single 470uF cap has a series resistance of 0.12 ohms which seemed a realistic value. The voltage source (transformer) has four different series 'resistance' values set, 0.1 ohm, 1 ohm, 2 ohm and 5 ohm. This series 'resistance' makes a massive difference to the ripple current seen in the cap. You can of course add your own series resistance to bring down the peak ripple currents seen.
The first image shows the ripple current in the cap, the second image shows the DC supply and corresponding ripple for these different series impedances.
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