3 ms·
What’s an application that needs to be super small, but doesn’t risk getting lead into people’s bloodstream and the environment? I can’t think of many…
by kennywinker 4y ago
What’s an application that needs to be super small, but doesn’t risk getting lead into people’s bloodstream and the environment? I can’t think of many…
- tbrownaw 4y agoSwitching power supplies with power factor correction need some pretty hefty capacitors I think.
- londons_explore 4y agoThere are ways to do power factor and harmonic correction with far smaller capacitors. The problem boils down to wanting to take power from AC in a sin squared wave, and outputting it at a constant rate. So you need storage of the integrated difference. Therefore the energy storage required is the energy used in a quarter of a full cycle of the original AC. For a 500 watt PC power supply running on 60 Hz, the storage is 2 Joules, which at an energy density of 2 Joules/gram gives you a capacitor of about 1 gram or 0.5 cubic centimetres. Ie. The capacitor requirements for a desktop PC power supply can be as low as the size of a pea, if the design is right. Typically they're far larger for other reasons - usually to simplify the design
- deleted 4y ago[deleted]