What is the use of silicon steel sheet? Today, Jiangsu National Energy engineers share with you, talking about the role of silicon steel sheets in power transformers. Silicon steel sheet is an important part of power transformer, can be called electrical silicon steel sheet. It has excellent electromagnetic properties and is an indispensable magnetic material in power, telecommunications, instrument industry and professional power transformer manufacturers. In a broad sense, the silicon steel sheet is a plate, and its silicon content is as high as 0.8% to 4.8%. Made by hot or cold rolling. Generally, the thickness is less than 1mm, so it is called thin plate. So, how does the silicon steel sheet in the power transformer measure its indicators and categories?
Regarding the performance indicators of silicon steel sheet, it can be divided into the following aspects in Shenzhen switching power transformer.
1. High magnetic induction. In the same magnetic field can obtain a high magnetic induction of the silicon steel sheet, the use of it to manufacture the motor or power transformer core of the volume and weight are relatively small, relatively can save silicon steel sheet, copper wire and insulation materials, so as to reduce the cost of the transformer.
2. High stacking coefficient. The surface of the silicon steel sheet is smooth, flat and the thickness is relatively uniform, and the stacking coefficient of the manufacturing iron core is far increased.
3. Low iron loss. This is the most important indicator of the quality of silicon steel sheet, the world is divided by the iron loss value, the lower the iron loss, the higher the grade, the higher the quality.
4. The film is good. This is particularly important for the manufacture of small, micro motor cores.
5. The adhesion and weldability of the surface to the insulating film are good.
6. The silicon steel sheet can be used only after annealing and pickling.
Regarding the classification of silicon steel sheets, it can be divided into the following two categories.
A, according to the production process can be divided into hot rolling and cold rolling two types. Cold rolling can also be divided into grain unoriented and grain oriented. The cold-rolled sheet has uniform thickness, good surface quality and high magnetic properties. Therefore, with the rapid development of industrial science and technology, the hot-rolled sheet is gradually replaced by the cold-rolled sheet.
B, silicon steel sheet according to its silicon content can be divided into low silicon and high silicon two. The silicon content of low silicon wafer is less than 2.8%, it has a certain mechanical strength, mainly used in the manufacture of motor, commonly known as motor silicon steel sheet; The silicon content of high silicon wafer is about 2.8% to 4.8%, it has good magnetism, but it is relatively brittle, mainly used for the manufacture of security power transformer core, commonly known as transformer silicon steel sheet.
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