1, iron core has a variety of materials, common: Silicon steel sheets, ferrite, etc..
2, the transformer iron core is made according to the principle of electromagnetic induction, the transformer iron core mainly plays a magnetic conductivity, only after magnetic conductivity, can carry out magnetic and electrical conversion. The main role of the iron core of the Transformer is to play the role of a magnetic guide and a skeleton. The magnetization and magnetic induction of the core are also constantly changing in the electromagnetic field of the Transformer. Almost all Transformer cores require high magnetic conductivity. The common iron core is "Japanese" shaped, with the middle transverse winding around the primary and secondary coils. With the iron heart, the primary and secondary can better interact with each other.