Big Project LED's
(4) 33 volt 100 watt LED's wired in series, with a 25 amp 800 PIV stud mounted rectifier for 127 vac operation. Dang I wish this would work, it would save me a lot of money. Or then it might make the ...
Forum Discussion
Gdetrailer wrote:
"Half Wave rectification without filter caps will result in HALF the voltage at 89V in theory but in practice generally you can count on about half of the AC RMS or about 60V-70V.
Assuming those LEDS are designed from 32V to 36 V or 96V-108V for three in series which should be well high enough."
Not correct but not going into it.
The LEDs will see the peak voltage of about 180V. At that time the current will be at maximum, well over what it is at 127V. The LEDs are sensitive to peak current and will smoke.
Also, dissipating 400W will need a huge heat sink with fans on it. Or maybe water cooling.
"Half Wave rectification without filter caps will result in HALF the voltage at 89V in theory but in practice generally you can count on about half of the AC RMS or about 60V-70V.
Assuming those LEDS are designed from 32V to 36 V or 96V-108V for three in series which should be well high enough."
Not correct but not going into it.
The LEDs will see the peak voltage of about 180V. At that time the current will be at maximum, well over what it is at 127V. The LEDs are sensitive to peak current and will smoke.
Also, dissipating 400W will need a huge heat sink with fans on it. Or maybe water cooling.
