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to Bob:
Bob, I am wondering how a 3 phase transformer works. (the "closed magnet path and 3 windings"- type)
If I have a magnetically conducting torus and wind onto it 3 primary coils, 120 deg apart, and then ontop, or better: around the primary coils, I wind the 3 secondary coils.
Now let us mark the coils P for Primary, S for Secondary and 1,2,3
1) P1 gets "current" (for the beginning I disregard phase changes)
This induces a magnet field into the torus at the place of P1.
1a)But what about the rest of the torus? It is a closed flux loop, so the magnet field inside the torus is for example much stronger than if there would be just air coils.
Is the magnet field ONLY inside the torus at the position of the coil, and the adjacent zones (the zone between coil 1 and 2 for example) do NOT have a magnetic field, or, even "worse": one with opposite direction?
2) Now let the time for P1 be over, instead P2 is being energized.
2a) Does the induced magnetic field in the torus simply walk away from P1 and wander over to P2?
2b) Or does the magnetic field of P1 break down, just as if there would be only one single 120 deg section of the torus only for P1 and no connection to P2, fluxwise?
And after that, the magnetic field of P2 builds up?
I would be very thankful if you could give me some hints.
I am not curious, but I need to know everything.
WiLi
Dont expect to escape with just one answer, the next questions are being prepared already.
(I hope, I do not bother you?)
I did put an echo to your health post in the pub, just in case you did not stumble upon it yet.
Wissen ist Macht.
Weisst nichts? Macht nichts.