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Connecting concentric windings in inductor using periodic condition - Problem
Posted Mar 7, 2013, 3:22 a.m. EST Electromagnetic Heating, Heat Transfer & Phase Change Version 4.3a 2 Replies
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The two windings have each two connectors, lets call them In1, Out1, In2 and Out2. Since the coils are concentric, In1 and In2 are located next to each other and the same thing goes for Out1 and Out2. I excite the coils at In1 and then use a "Periodic Condition" between Out1 and Out2 with Out2 as the destination so that the current flows In1 > Out1 > Out2 > In2.
For this case, the currents will be exactly opposite inside the windings, resulting in a lot of field cancellations. However, i would like for them to run in the same direction so that the cancellations occur between the windings instead. But setting the Periodic Condition between Out1 and In2 with In2 as the destination results in the same case as before (the currents flow in opposite direction in the windings).
I've also tried rotating one of the coils 180 degrees so that In1 and In2 are on the opposite sides (the same for Out1 and Out2 of course). What happens in this case is that the currents go through In1 and as it approaches the second winding, all of the currents seem to jump over to the second winding and leave at In2 resulting in zero currents in the coils and therefore no fields att all in the inductor and no heating either.
So the question is - How can i make the currents go in the same direction for both coils?
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My knowledge in the electrical circuit model are very low so before I make an attempt on applying it on my model - is this something that could work? And if that's the case, how should I do it?
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IH is a complex physics ,you should start with something simpler if you are not really used to it. You have several domain physics to choose among, as the induction heating does normally NOT heat up the air but only highly conductive materials, then you must define solid and fluid domains ...
Ideally you should use external boundary feeds for the current/voltage excitation, but they seem not to be defined in IH as in MEF, but maybe you need to remake the model in a newer version
IH solves for T, J and H, you must ensure that for each dependent variable you define enough BC's to solve to an unique solution
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Good luck
Ivar