1
\$\begingroup\$

enter image description here

I'm currently calculating the excitation current for a transformer but I keep getting the wrong answer. I tried converting the highlighted values to rectangular form (first highlighted value) but still couldn't obtain the same answer as the one given below (second highlighted value). I am trying to achieve the value '2.678∠-86.8'.

\$\endgroup\$
2
  • \$\begingroup\$ There are two highlighted sections. Which one are you talking about? \$\endgroup\$
    – Andy aka
    Jan 11 at 11:31
  • \$\begingroup\$ I'm trying to get the second highlighted value (2.678∠-86.8) \$\endgroup\$
    – miu.spiro
    Jan 11 at 11:49

1 Answer 1

Reset to default
3
\$\begingroup\$

I'm trying to get the second highlighted value (2.678∠-86.8)

Well, before that you have \$\dfrac{53.6\angle 3.2}{j20}\$ and that is the same as: -

$$\dfrac{53.6\angle 3.2}{20\angle90}$$

And that equals: -

$$\dfrac{53.6}{20}\angle(3.2-90) = 2.68\angle -86.8$$

\$\endgroup\$
2
  • \$\begingroup\$ I see, so the j value is always 90 degrees in this context? \$\endgroup\$
    – miu.spiro
    Jan 11 at 12:05
  • \$\begingroup\$ @miu.spiro yes it is exactly the same as "i" in mathematics (the complex operator). \$\endgroup\$
    – Andy aka
    Jan 11 at 12:06

Your Answer

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

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