5 ms·
Actually not really... A single-phase-AC-sourced rectifier does need a considerable output capacitor, though, and it will have a poor power factor with severe h
by namibj 5y ago
Actually not really...
A single-phase-AC-sourced rectifier does need a considerable output capacitor, though, and it will have a poor power factor with severe harmonics unless it spends extra on PFC which would not be necessary with a local DC grid supply (say, 320V DC to replace 230V AC systems to match peak voltage; yes the higher RMS voltage results in (anti-)proportionally reduced current, allowing cheaper/thinner wires or less loss).
- pitaj 5y agoMany LED bulbs are a simple diode rectifier circuit, essentially with a bunch of LEDs stacked to add up to a total 120V bias voltage. These will blink at 60Hz or 120Hz depending of if they implement a half-wave or full-wave. More complicated bulbs use an active rectifier / switching power supply instead.
- namibj 5y agoThose are kinda shit, though. Also, the ones you're thinking of should be capacitive dropper circuits, if I'm not mistaken. There's also the electrolytic-smoothed bridge rectifier variant. BigClive has a lot of teardowns of such light bulbs (and non-bulb-shaped alternatives) with circuit diagrams and explanations. They're really good for learning about the various "cheap LED bulb" designs.