Lets say one has this big super capacitor with 2.5V and 200-400F of charge. And you want to run 12V / 1A DC motor off that super cap. How is it done?
Charge is in coulombs, capacitance in farads (F). 2.5V and 400F would mean 1000C.
A boost converter is needed, and one which maintains the output voltage as the input voltage drops.
A capacitor stores energy equal to 0.5 C V^2, so 2.5V and 400F holds 1.25kJ, enough to supply 1A
at 12V for 100s assuming very efficient boost converter
As someone once told me right here, "wish I'd thought of that". jk
Very efficient here meaning 100%. But I saw a 100% efficient solid state HF linear amplifier. The designer showed it to a crowd of hams and sure enough when powered by a car battery, it put out 600W @ just under 50A input. Nobody seemed to think a thing about it. :/
A 400F supercap designed for high loads will probably handle 100A or more. Indeed a search
locates a WIMA SuperCapR 400F that handles 80A continuous, 600A pulse. Internal resistance
Man they go all the way up to 3000F in the line with a 3000A discharge rate. I'd like to have a few of those. Wonder if they're regulated by an gov agency like DHS.