What material is the silicon steel sheet used for the transformer core?
Silicon steel sheet can be divided into two kinds: low silicon and high silicon according to their silicon content. Low silicon silicon containing less than 2.8%, it has a certain mechanical strength, mainly used in the manufacture of motor, commonly known as dynamosheet; high silicon silicon content is 2.8%-4.8%, it has good magnetic properties, but more brittle, mainly used in the manufacture of transformer core, commonly known as the transformer silicon steel sheet. There is no strict boundary between the two in practical use, and large silicon motors are usually used to manufacture large motors. B can be divided into two kinds of hot rolling and cold rolling according to the production process. Cold rolling can be divided into two kinds of grain free orientation and grain orientation. Cold rolled sheet of uniform thickness, good surface quality, high magnetic, therefore, with the development of industry, the trend of hot rolled sheet is cold rolled sheet has replaced (China has explicitly requested to stop the use of hot rolled silicon steel sheet, which is called "pre cold generation of heat").
Electrical silicon steel sheet or silicon steel sheet or steel sheet. As the name suggests, it is an electric silicon steel containing silicon up to 0.8%-4.8%, made by hot and cold rolling. The thickness is below 1mm, so it is called thin plate. Silicon steel sheet is generally referred to as sheet metal, and is independent of its special use.
A, low iron loss. The quality of the most important indicators, countries around the world are divided into grades of iron loss, iron loss is lower, the higher the grade, the quality is also high.B, high magnetic induction. The silicon steel sheet with higher magnetic induction can be obtained under the same magnetic field, and the volume and the weight of the motor or transformer core manufactured by the utility model are smaller, and the silicon steel sheet, the copper wire and the insulating material can be saved relatively. C, high stacking factor. The silicon steel sheet has the advantages of smooth surface, smooth formation and uniform thickness, and the stacking coefficient of the iron core is improved.D and good punching. This is more important for the manufacture of small, micro motor cores.E, the surface of the insulation film adhesion and good weldability.F and magnetic agingG and silicon steel sheets should be delivered after annealing and pickling.
