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Arbitrary (saturable) coupled inductors in LTSpice
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uer166:
Trying to simulate saturable coupled inductors/transformers in LTspice for some current sensing project, but seems like I can't couple arbitrary inductors.

I would like to simulate a transformer with a defined saturation level, slope, and hysterisis, but seems like I'm going about it the wrong way?

I tried reading http://ltwiki.org/?title=Transformers, but seems incomplete regarding this topic.. Anyone know what to do?
cur8xgo:
I dont know how to do this I just googled it..this looks interesting

https://electronics.stackexchange.com/questions/243927/transformer-with-hysteresis-in-ltspice

Jay_Diddy_B:

--- Quote from: uer166 on June 21, 2019, 11:32:20 pm ---Trying to simulate saturable coupled inductors/transformers in LTspice for some current sensing project, but seems like I can't couple arbitrary inductors.

I would like to simulate a transformer with a defined saturation level, slope, and hysterisis, but seems like I'm going about it the wrong way?

I tried reading http://ltwiki.org/?title=Transformers, but seems incomplete regarding this topic.. Anyone know what to do?

--- End quote ---

Can you provide details of the core that you are looking to model?

I will also need the winding information.


This can be done in LTspice, I will try and do it for you.

Regards,
Jay_Diddy_B
uer166:
The core itself is inconsequential, just trying to figure out a general way to do it. As example, and should be pretty close to something realistic I would use:

Core material is Square Orthonol: https://www.mag-inc.com/Products/Tape-Wound-Cores/Square-Orthonol/Square-Orthonol-Material-Property-Curves

Some arbitrary core size: 0.5cm^2 cross section area, 10cm magnetic path length.
Turns: 20 turns per winding, 1:1 ratio.

Use case would be: apply a known DC voltage to one winding, wait for current to ramp and saturate, look at the EMF output of secondary winding.
ahbushnell:

--- Quote from: uer166 on June 21, 2019, 11:32:20 pm ---Trying to simulate saturable coupled inductors/transformers in LTspice for some current sensing project, but seems like I can't couple arbitrary inductors.

--- End quote ---

Here is a paper on the topic from TI. 

http://www.ti.com/lit/ml/slup109/slup109.pdf


Nonlinear simulation can be complicated.  Depends on what you are trying to do. 

TI as other sources of information.  And your local library.

Good luck

Andy
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