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What is a core in the transformer?

What is a core in the transformer?

January 22, 2024

 

The core of the transformer is the magnetic circuit part of the transformer.

 It is usually made of hot-rolled or cold-rolled silicon steel sheets with a high silicon content and coated with insulating paint on the surface. The iron core and the coils wound around it form a complete electromagnetic induction system. The amount of power transmitted by the power transformer depends on the material and cross-sectional area of the core.

 

The iron core is one of the most basic components of the transformer. It is the magnetic circuit part of the transformer. The primary and secondary windings of the transformer are on the iron core. In order to improve the permeability of the magnetic circuit and reduce the eddy current loss in the iron core, the iron core is usually Made of 0.35mm, surface insulated silicon steel sheet. The iron core is divided into two parts: an iron core post and an iron yoke. The iron core post is covered with windings, and the iron yoke connects the iron core to form a closed magnetic circuit.

In order to prevent the metal components such as the transformer core, clamps, and pressure rings from inductive floating potential being too high and causing discharge during operation, these components need to be grounded at a single point. In order to facilitate testing and fault finding, large transformers generally have the core and clamps lead out to the ground through two bushings respectively.

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