Is the silicon steel sheet in the motor not the material that does not guide magnetism?
Wrong, silicon steel sheet magnetism is better than ordinary steel. Because the iron cores we use have to use magnetic fields to convert energy. Of course, the higher the strength of the magnetic field in the same state, the better. This material is used for iron core, and another is that the resistivity is higher than ordinary steel.
The resistance here is the resistance that prevents the vortex. In fact, because of the skin effect of the vortex, most vortices form a loop on the surface of the conductor. That is the resistance of the conductor in that circle.
These two advantages make it an iron core. You know, as long as the metal into the alternating magnetic field, will produce eddy currents, and lead not to lead the magnetic relationship. Otherwise, how could the detector find underground copper or silver or even gold products?. Since the vortex must be there, we can only think of ways to reduce it. How to reduce, first analyze the eddy current size of the determining factors, and one is the strength of the alternating magnetic field. This can't be changed. Who told us to use the magnetic field?. What is more, it is the core of the resistance, the higher resistance, the current eddy current value is small, well, increasing the resistance, the core is to use this method, the first use of high resistivity silicon steel sheet, and then the whole core is divided into very thin mutual insulating sheet, vortex flow is limited to each patch, the eddy current strength greatly decreased.
