SuperFungus

8 ms·

1. 1.▲
   by SuperFungus 15y ago

   There's quite a few practical details that weren't addressed. Whats the self discharge of these caps? Sure, maybe they can hold a ton of energy in a small volume but who cares if it bleeds off in 2 hours? What's the performance over tempe
2. 2.▲
   by SuperFungus 15y ago

   Thats the discussion. In reality, you care about both. Power density to move the energy into and out of the cell quickly to shorten charge times and supply thirsty loads. Energy density to run lower loads for longer.
3. 3.▲
   by SuperFungus 15y ago

   You don't need superconductors to get around the skin effect. It's actually interesting that you mention superconductors, as the skin depth in a perfect conductor is actually zero. (Anyone know what happens at DC in theory in a perfect co
4. 4.▲
   by SuperFungus 15y ago

   "Further increases are not recommended due to increased hysteresis loss." This is why I am REALLY hoping the materials revolution everyone keeps talking about takes off and we get some decent high frequency, high permeability, low loss, hig
5. 5.▲
   by SuperFungus 15y ago

   I can see the advantage, but I still would argue that just having some DC power standard like USB will always be more economical and practical than trying to build "do it all" supplies to work with all gear despite the absence of a standard
6. 6.▲
   by SuperFungus 15y ago

   Hey, not to shoot you down but there is definitely a transformer in the iphone supply. Second, building switching supplies that can supply an arbitrary output voltage/current isn't practical or economical. Third, don't you want a power su