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I am trying to implement a non-linear inductor in LTSpice and to get it to saturate.

I am using the following directive between N1 and N2 as advised in the help files:

L1 N1 N2 Hc=12 Br=0.2 Bs=0.4 A=4u Lm=0.4 Lg=0.01u N=100

With a DC voltage supplied the circuit behaves as if it is purely resistive regardless of the voltage.

This is the circuit I am using.

enter image description here

Plot. enter image description here

Is there something else that needs to be added here??

Thanks.

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2 Answers 2

Reset to default
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Don't make the source a DC source.

With the DC source, LTSpice is assuming the voltage has been 10 V since \$t=-\infty\$ and all transients have settled before the simulation starts.

Make it a transient source that turns from 0 V to 10 V a few ms after the simulation starts.

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  • \$\begingroup\$ Yea the delay works better. Also I had too low a resistance and it was saturating almost immediately. I increased the resistor so the current was stable and then increased when it went into saturation. Thanks. \$\endgroup\$
    – MXG123
    Commented Aug 16, 2019 at 19:03
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Use a PWL or PULSE source. In addition to what ThePhoton said, you can change the graph to an x-y source by clicking on the time axis and changing the time axis to a signal.

enter image description here

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