Capacitor Power Supply

200

03:48:11

An unregulated power supply that not using a transformer but using a capacitor and resistor to make ripple and voltage low

published 8 years ago

eekee

8 years ago

The resistors aren't really doing anything. I guess the capacitors have a high impedance. That's neat, but I don't know if they provide enough isolation for safety. Also looks like 2 mains-rated 2.2μF caps would be bigger than a small transformer anyway. The lead pitch of these is about 1.5 inches: https://uk.rs-online.com/web/p/polypropylene-film-capacitors/4148588/

eekee

8 years ago

Also the caps need to dissipate 10W each. Those plastic cases don't look built for it. Aaand stock info: the voltage "amplitude" should be 325V for a 230Vrms mains supply. EC has its own standards. (My 10W figure assumes the higher voltage and maybe adjusted capacitor value.)

hurz

8 years ago

@eekee, I have to say you epic fail. You cant multiply voltage and current to get the power dissipation at a condensator! Look how both are not in phase! For a resistor you can do that but not for reactive components, like coil or caps. I think you should check that from a book or you can ask here. BTW, the resistors are just so called bleeding resistor and help to discharge the caps in case of switch of, or unplug from mains, to not get shocked if you touch the connetors.

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