EI core three-phase lamination can be effectively divided into low silicon and high silicon according to the silicon content during operation. The low silicon wafer contains less than 2.8% silicon. It has a certain mechanical strength and is mainly used for manufacturing motors. It is commonly known as motor silicon steel sheet. The silicon content of high silicon wafer is 2.8%-4.8%. It has good magnetic properties but is brittle. In the manufacture of transformer core, commonly known as transformer silicon steel sheet. There is no strict limit between the two in actual use, and high-silicon wafers are often used to manufacture large motors.
EI core three-phase lamination can be effectively divided into hot rolling and cold rolling according to the process of its production and processing. Cold rolling can be divided into two types: grain orientation and grain orientation. The cold rolled sheet has uniform thickness, good surface quality and high magnetic properties. Therefore, with the development of the industry, the hot rolled sheet has a tendency to be replaced by cold rolled sheets (China has explicitly requested to stop using hot rolled silicon steel sheets, which is what was said in the previous period. "Take cold to replace heat").
The EI core three-phase laminate has high magnetic induction. A silicon steel sheet capable of obtaining a higher magnetic susceptibility under the same magnetic field, and a motor or a transformer core manufactured by the same has a small volume and weight, and relatively saves silicon steel sheets, copper wires, and insulating materials.
The EI core three-phase laminate has a high stacking factor. The surface of the silicon steel sheet is smooth, flat and uniform in thickness, and the stacking factor of the manufactured iron core is improved. Good punching. This is even more important for the manufacture of small, miniature motor cores.