Good morning everybody
Y would like to make an inductor that can saturate with current. Basically, define a derating curve L(I).
Standard models allow to define frequency resonance but nothing to have relation with curent level.
Have you informations to give me?
Thank you in advance.
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PSpice Ideal Inductor model support linear and Quadratic current coefficients.
IL1 - Linear current coefficient
IL2 - Quadratic current coefficient
one can use these two model parameters to model L as function of Current through the inductor.
Inductance value is calculated by
<value>·L·(1+IL1·I+IL2·I*I)·(1+TC1·(T-Tnom)+TC2·(T-Tnom)*(T-Tnom))
TC1 and TC2 are temperature coefficient
You can use Inductor part from breakout library and modify associated model to include IL1 and IL2 parameters.
You can also use magnetic core with winding to model an inductor. In this case inductance value would be governed by magnetic core characteristics, which will also show inductance as function of current.
Thank you for your quick answer.
i have somme difficulties to use theses parameters. On PSPICE command tutoriel, it is write that if we want to use the inductor with the equation "<value>·L·(1+IL1·I+IL2·I*I)·(1+TC1·(T-Tnom)+TC2·(T-Tnom)*(T-Tnom))", we have to include {model name} in the general format: "L|name| |+ node| |- node| {model name} |value| {IC = |initial value|}".
The problem is that when we use inductor in PSPICE (16.6) with "L.normal" library, we only have standard parameter by double click to the component. How we can acces to the inductor command line to include "{model name}" command?
Thank you
I come back on my problem.
I have added IL1 and IL2 properties on an indictor model that have been copied from Lbreak/breakout library:
.model My_L IND L 1
+ IL1=0.0007
+ IL2=-20E-6
+ TC1=0
+ TC2=0
When i simulate the componant with a DC voltage source to characterised the inductor, the model do not follow the theorical equation (verified on excel sheet): <value>·L·(1+IL1·I+IL2·I*I)·(1+TC1·(T-Tnom)+TC2·(T-Tnom)*(T-Tnom)) (quadratic wave) and diverge when the current is equal to the saturation point.
I can't add an ideal small inductance in serie to simulate inductor saturation value.
Can you help me?
Thank you
Please also see the Pspice Power IC Model Library sold by EMA (https://www.ema-eda.com/products/more/aei-power-ic-model-library).
There are many satuable models, including a full line of MPP cores avilable in the library.