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To the left of the 1kHz source is a load fed through a 1:10 transformer with a primary inductance of 10mH, a secondary inductance of 1H, and a coupling coefficient of 0.9. To the right of the 1kHz source is an equivalent circuit constructed out of two ideal transformers (or as close as EC can get) and an inductor network. Unfortunately, every transformer in EC has a coil resistance on each side of 100mΩ so the two transformer circuit has more resistance than the one transformer circuit so I added a couple resistors to the one transformer circuit to make the two circuits match. With this addition the two circuits are completely, 100% identical to each other and indistinguishable (well except for the non-infinite 1MH inductance of the “ideal” transformers, but it’s enough inductance to be effectively infinite). However, as you can see the voltmeter still measures a voltage difference. I believe that this is simulation noise due to rounding errors, which gives a bit of a window into the inner workings of EC, although I’m not sure any useful information can be gained from this window. But it does give a nice source of pseudo-random noise.
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