0
\$\begingroup\$

enter image description here

I can't find any source online to how I can calculate the capacitance in this circuit, the previous questions seem solvable, but any help would be appreciated thank you!!

Here’s a formula I found, but I’m not sure it’s applicable in this case. formula

\$\endgroup\$
  • 1
    \$\begingroup\$ I'm voting to close this question as off-topic because this is an exam or homework question. That's OK but you must show what you have tried. No one is expected to be able to answer this without having some education on the subject. So refer back to your book / notes where this was explained. \$\endgroup\$ – Bimpelrekkie Dec 17 '19 at 21:54
  • 1
    \$\begingroup\$ I'm voting to close this question as off-topic because it appears to be homework with no demonstration of what has been attempted so far. \$\endgroup\$ – JYelton Dec 17 '19 at 21:54
  • \$\begingroup\$ Our professor gave us this exercise in class and told us that the last part would be in the exam and that we’re expected to search it up and figure it out on our own, so I’m asking for any help I can find at this point, because the course I have didn’t help. \$\endgroup\$ – radioactivedecay Dec 17 '19 at 21:59
  • \$\begingroup\$ What you have here is a "full wave bridge rectifier with capacitor filter", so google it. \$\endgroup\$ – Aaron Dec 18 '19 at 0:16
0
\$\begingroup\$

you know C=Ic * dt/dV with dV = 4 , dt = 10ms, Ic=Vavg/R , Vavg = Vmax-min

let Vf diode = 0.7 x2

Often rated AC RMS out voltage includes 10% XFMR loss but that would be bonus points maybe... Which affects N but assume ideal here and remember this is peak AC given for input and not RMS which is only 70.7% of that.

| improve this answer | |
\$\endgroup\$
  • \$\begingroup\$ not quite sure what you meant. isnt V avg the integralover a period of the output voltage * sin2pift, devided by the period, where the output voltage is V*sqrt2 ? \$\endgroup\$ – radioactivedecay Dec 17 '19 at 22:36
  • \$\begingroup\$ 120cos(100 π t) .... I might have expected something else like 120√2 or 240√2 for Vin but Voc = 24Vdc max (open cct) 4Vpp ripple . just show assumptions \$\endgroup\$ – Tony Stewart Sunnyskyguy EE75 Dec 17 '19 at 22:50

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.