can someone check if i did this right? I've been trying to search for this type of power supply computation but i still haven't find any. I only used formulas i found from the internet and boylestad book...
using C= 100 micro
RL=200 ohm
If someone has a link to a computation of the same power supply ckt i'd really really appreciate it
another question is on rectifier part.. if Vrms is DC equivalent of Vac by definition how come VRMS is not equal to VDC? what's the difference. I understand that VR(RMS) from filter is different from VDC filter since ripple did not begin at V=0. But i am confused with rectifier
Vrms is equal to an equivalent dc value that would cause the same heating effect (i.e transfer same amount of energy) on a resistor. This is when the load is connected directly to the source and not through a rectifier or filter. The rectification efficiency of the converter which is less than 100% leads to losses hence output Vdc is not equal to output Vrms.
i see, rectification efficiency must be really low then approx 50% since Vr(rms) is around half of Vdc. I will also browse rectification eff. Thanks kiprono
how about my computation... anyone? did i use the right Vm = 29.17 (from rectifier output to regulator input)
i'm studying by myself... no teachers/classmates to ask ... just edaboard, boylestad and whatever i can find on the net
What you've just given is the rms of the ac component in the output voltage i.e. rms of the ripple. It seems Vr (or Vac) in your expression means ripple voltage and not output rms voltage of the rectifier.
The rms of the full-wave rectified output (both pulses positive) is the same as for the sine wave (with negative n +ve pulses).
(Vrms)=√[(Vdc)²+(Vac)²]
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Vrms AC is equal to Vrms DC which is the rectified output. you wont get the same value in actual because there's already a filter, and the Vrms depends on the capacitor used because it controls the ripple, lesser ripple more closeness to Vm the value of Vdc.
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V(rms) = Vrms=Vm/sqrt(2) is different from
Vr(rms) = 0.308Vm (for full wave rectifier)
thanks kiprono... you're really a big help!
any comment on my filter and regluator computation??
I saw some Power Electronics: Converters, Applications, and Design on e-books/download section... i will need to earn more points first then i will download it. you have any other recommendation ?
How many points you need to download the book? If you interested to gain the knowledge from this book. I will try to donat some point's for you to download the book.
How many points you need to download the book? If you interested to gain the knowledge from this book. I will try to donat some point's for you to download the book.