Electrons in the conductor are always along the resistance of the smallest flow. In the conductor surface and the near surface structure element and the conductor surface is basically parallel to the electronic transposition in which the flow resistance is small. And in the internal structure of the conductor elements were up and down, left and right, front and rear space arrangement, the direction of the flow of electrons to be subject to five directions of resistance, (and only three directions in the surface resistance) visible in the conductor near the surface of the resistance than Much smaller in the interior, thus leading to the skin effect of the current.
When the toroidal transformers move in the wire, the movement of the vertical direction associated with a magnetic field, (right-hand rule) under the action of other electrons in the magnetic field to the gradual divergence to the surrounding mobile, then moved to the wire near the surface to form the current Skin effect.
Of course, the temperature effect: in the conductor, the resistance of the heat generated is not easy to distribute, the temperature is higher, the price and the high rate of electronic operation, the line is not very flat, thus leading to relatively narrow electronic path, the resistance is high. In the conductor surface, heat dissipation, low temperature, the price and the speed of electronic operation is low, the line flat, thus leading to relatively large electronic pathways, and therefore the conductor surface resistance is small, faster external electronic operation, which is current skin one of the reasons. Tip discharge When a certain part of the conductor is made very thin tip, the tip part of the surface area is relatively large, transposition move to this electron density is relatively large, even in the tip part of some crowded, some electrons in the crowded from the tip Overflow, thus leading to the tip discharge phenomenon.
From the SMPS transformers "magnetic source" we understand that some of the atomic electrons outside the spin of the magnetic moment can not be offset, resulting in the remaining magnetic moment. However, if the magnetic moment of each atom is still chaotic arrangement, then the whole object still can not have magnetic. Only the atomic magnetic moments along a direction neatly arranged, like many small magnet end to end, in order to make the object external display of magnetic, magnetic material. The neat arrangement of the magnetic moment of atoms is called spontaneous magnetization. Since there is spontaneous magnetization within the magnetic material, then it is not all the atoms in the object are arranged in a direction neat it? Of course not, otherwise, all iron and steel will always be with a magnetic, as a large magnet, will always be able to attract each other (in fact, two soft iron will not attract each other). In fact, the vast majority of magnetic materials have a magnetic domain structure, so that they do not show magnetic magnetization.
Oeder transformer in www.xp-elec.com
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