Inductor Simulation with current

Status
Not open for further replies.
B

beorza

Newbie
Joined
Mar 2, 2021
Messages
2
Helped
0
Reputation
0
Reaction score
0
Trophy points
1
Activity points
19
Hi everybody

Question: I designed a helical inductor 130uH with the range of current from 0ADC to 35ADC I tested that inductor in the workbench and I got the chart how the inductance decreases with the current. With this chart I got the equation of that curve L(uh)= 130-55*((tanh(x/15)^4). I followed the LTspice example " Flux= 1m*thanh(5*x).
I added my equation to the model "Flux=130u -55u*pow(tanh(x/15),4)". Unfortunately the chart I got from LTspice is opposite (curve is going up). Do you have any idea what I missed or did I make something wrong?

I really appreciate you help

Thank you very much and have a wonderful day
 

Just a suggestion - maybe that chart show reactance instead of inductance ?
 

Prototyp_V1.0 said:
Just a suggestion - maybe that chart show reactance instead of inductance ?
Click to expand...
Thank you for your answer

This is the equation I have for my coil, Flux=14u-4u*(pow(tanh(x/49),4))
If I put that one in the boost converter it gives and output value larger (more then 10V) than I expected. it is a boost converter from 3.3 V to 5.0 V. If I multiply by -1 , Flux=-14u+4u*(pow(tanh(x/49),4)) it works. I do not understand why, supposedly LTspice should take the original equation.

Thanks
 


Status
Not open for further replies.

Similar threads

Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…