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Arbitrary (saturable) coupled inductors in LTSpice
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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