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Presumably because the input AC starts off with a positive half cycle.Anyway, it is still AC, it's just shifted to the positive side.
Yes, I found that but I left the R there for comparison.Actually with or without that resistor the results are the same.
I don't remember ever encountering integration by parts in my studies (although I may have). I ran across it while trying to figure out what was causing the DC current in the simulation.Thanks for the explanation, Roff. My maths is >50 years old too and rustier than yours. I don't think I ever got to grips with integration by parts.
Yes, I'm finding that. One slight prob is selecting a 'reasonable' resistance. Not all inductive components have specs which include both inductance and (series) resistance, yet alone parallel resistance and parallel capacitance .Now if you add some reasonalble resistance, the reuslts will settle much faster.
Another possibility to mimick the real world is to set the Initial condition of the inductor. If I run it with the IC=0, the simulation starts positive and slooowly settles. If I set the IC according to the final state, that is IC=-30mA for a 60mApp current, then simulation is where it "should be" from the beginning.
I was mostly responding to post #10. Sorry for the confusion.Roff,
I was convinced when you posted the first time. I only posted in response to the person wondering about the differences between simulation software.
Mike Engelhardt, creator of LTSPICE Posted: Sun Feb 22, 2004, posted the differences between the integration models at https://forum.allaboutcircuits.com/newsgroups/viewtopic.php?t=9394