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Application advantages of EI silicon steel laminations and their welding characteristics
Oct 18, 2018

Due to the high magnetic permeability of silicon steel, silicon steel sheets are widely used in the manufacture of electric motors, transformers, and the like. Because the whole ferromagnetic material will generate large eddy currents during operation, it is unfavorable for the transformer. To reduce the eddy current, it is necessary to form the ferromagnetic material into thin slices and stack them into the required cross-sectional area. This is the EI silicon steel. The reason why the laminate is popular.

 

With the development of electrical production, welding as a process for fixing EI silicon steel laminations, instead of riveting, crimping, filling fillers and other traditional methods show obvious advantages. The welding of EI silicon steel laminations can not only reduce the number of processes, but also facilitate mechanization automation of production, and it also has obvious effects in improving quality.

 

More and more welding methods are used to fix EI silicon steel laminations, especially in the production of micro-motors and small appliances. Compared with ordinary low-carbon steel welding, the welding is not only different in material, but also different in surface condition and use. Therefore, some characteristics of welding should be noted.

 

There is also a lamination coefficient forEI silicon steel laminations, which actually refers to the ratio of the theoretical volume of a certain amount of silicon steel lamination to the actual volume measured under a certain pressure, expressed as a percentage, and the lamination factor is a measure of iron. A measure of the actual tightness of the core. The high lamination coefficient means that the amount of silicon steel sheet increases when the core volume is constant, and more magnetic flux density passes, the effective use space increases, the air gap decreases, and the excitation current decreases. For micro and small motors, reducing the air gap by 10 to 15% reduces the excitation current by 40 to 60%, which is more important than improving the magnetic properties of the silicon steel sheet itself.

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