Where's Waldo?
Hi Ufo,
On the iron cube, there will be North poles on the 2 square surfaces facing the the South poles of the 2 magnets. It does not matter that they are touching. Further, on the iron cube, the other 4 square surfaces become the South poles.
This is very much like the 4 pole rotor in a PMSM. See the diagram below. I added the Ns and Ss to the diagram. The member identified as the rotor would be your iron cube. In the case of the rotor, 2 additional magnets are put on to the core surface but my polarity indications would remain the same had they not been added. By adding them (using 4 magnets (N-S-N-S)), the leakage (unwanted flux paths) on the ends of the rotor is minimized therefore those end surfaces (unlike the cube example) would be polarity neutral.
You can apply Maxwell's 2nd equation on Gauss's Law for Magnetism and the definition of magnetic poles as: North = surface with flux direction outwards of the subject volume and South = surface with flux directed inwards to the subject volume.
Regards,
bi
Originally posted by Ufopolitics
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On the iron cube, there will be North poles on the 2 square surfaces facing the the South poles of the 2 magnets. It does not matter that they are touching. Further, on the iron cube, the other 4 square surfaces become the South poles.
This is very much like the 4 pole rotor in a PMSM. See the diagram below. I added the Ns and Ss to the diagram. The member identified as the rotor would be your iron cube. In the case of the rotor, 2 additional magnets are put on to the core surface but my polarity indications would remain the same had they not been added. By adding them (using 4 magnets (N-S-N-S)), the leakage (unwanted flux paths) on the ends of the rotor is minimized therefore those end surfaces (unlike the cube example) would be polarity neutral.
You can apply Maxwell's 2nd equation on Gauss's Law for Magnetism and the definition of magnetic poles as: North = surface with flux direction outwards of the subject volume and South = surface with flux directed inwards to the subject volume.
Regards,
bi
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