#### argens

##### Newbie level 6

am new here and already seeking for help.

Found this forum thanks to my schoolmates. Hope to get some answers and in the future also help to find some solutions.

My problem is as follows:

I have such a schema

**, like https://uk.farnell.com/bi-technolog...lftr/inductor-33uh--20/dp/2192082?ost=2192082):**

__(please note the trafo on the schema is in reallity a Coupled Inductor__And need to calculate the needed inductance (L).

I know the following:

U = 30 V

I = 3 A

f = 70 kHz

And was counting as:

Z = U / I = 10 Ohm

|Z| = sqrt((R^2)*(Xl^2) |R=0

|Z| = Xl = 10 Ohm

L = Xl/w

L ~= 22,7 uH

Am doing it right?

Thanks for any help!