0
\$\begingroup\$

Been trying to get out two matching power factors (p.f) from the following circuit Calculation, enter image description here enter image description here

What am I doing wrong? Been working on it for 8 hours in total. Used matlab to minimize my error and so on. But I keep getting a differnece...

\$\endgroup\$
7
  • \$\begingroup\$ The frequency is 60 Hz. \$\endgroup\$ Commented Jan 24, 2018 at 5:17
  • \$\begingroup\$ For \$60\: \text{Hz}\$, I get \$100\:\Omega\mid\mid\left(5\:\Omega+10\:\text{mH}\right) = 4.88451729 + 3.41501831j= 5.95993785\: \angle 34.959385^\circ\$. \$\endgroup\$
    – jonk
    Commented Jan 24, 2018 at 5:30
  • \$\begingroup\$ Even for such a small differnece the end result between the two p.f dosen't match unfourtunetly. \$\endgroup\$ Commented Jan 24, 2018 at 5:50
  • 1
    \$\begingroup\$ Please rotate your photos. \$\endgroup\$
    – Daniel
    Commented Jan 24, 2018 at 5:55
  • \$\begingroup\$ @Zeclot What is the power and power factor for \$R_1\$? (It should be obvious.) The voltage across \$R_1\$ is the same as the voltage across the \$R_2+L\$ leg. But the voltage across both these two legs is \$120.0\:\text{V}_\text{RMS}\:\angle0^\circ\$, isn't it? \$\endgroup\$
    – jonk
    Commented Jan 24, 2018 at 6:48

1 Answer 1

-1
\$\begingroup\$

I solved the problem. I used P=VI instead of VI' ('= conjugate). So the angle became wrong and gave extra errors.

\$\endgroup\$
3
  • \$\begingroup\$ You can edit your question. Please delete this because it is not answer and edit your question with these pics. \$\endgroup\$
    – Hazem
    Commented Jan 24, 2018 at 10:54
  • \$\begingroup\$ How is this an "Answer" to your question? \$\endgroup\$
    – Tyler
    Commented Jan 24, 2018 at 13:15
  • \$\begingroup\$ I did a comment on the problem. But when I added the new pictures it turned in to an answer. But solved the problem. Had a conjugate problem when calculating the power \$\endgroup\$ Commented Jan 25, 2018 at 23:04

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

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