How to assign solved numerical value to use in the formulas?

Forum|Forum|6 years ago
March 20, 2020
6 replies
2859 views

Hi,

I am trying to use solve function to calculate variable's value, but I do not know how to assign this for further calculations.

Please see attached.

Thanks

Electrical_Engineering

F

Fred_Kohlhepp

23-Emerald I

Your top expression, fco :; ~~(xxxx)~~ solve, C will do the trick, it returns your answer.

BUT: Mathcad symbolics is weak. It doesn't understand units.

Try this:

Attached as Prime 4

1_capacitor.zip

A

Artiom

Author

1-Visitor

Thank you Fred. It makes sense that rearranging the formula I could get the result assign to the variable and use that in other formulas. But is there a way for Mathcad to rearrange that for me and use that figure linked to other formulas?

This equation is quite simple, but if we imagine having very complex one, we wouldn't want to rearrange the formula manually as we have a software for that.

Thanks for your help!

F

Fred_Kohlhepp

23-Emerald I

Artiom;

Werner has shown you how to do what you wanted. (Since I am constrained to Prime Express, where symbolics are not possible, I had to resort to high school algebra.)

I am surprised that Werner didn't extrapolate his solution one more step: You can assign a function to the symbolic expression. Instead of just Cinput, put Cinput(fco,Lin) on the left hand side (put the whole symbolic line ABOVE where you define what the frequency and inductance values are.) Now you can solve for the capacitor value that satisfies any combination of frequency and inductance.