Transformator temir yadrosi

1. Vhat is transformer core

A transformer core is a structure composed of multiple layers of thin iron sheets (most commonly silicon steel sheets), around which the transformer's primary and secondary windings are wound.

2. The composition of the transformer

The transformer core is composed of an iron core body (silicon steel sheet), fasteners, insulation parts, ground lugs and some other auxiliary parts.

2.1 Core body

It is composed of hot rolled/cold rolled silikon po'lat plitalar with high silicon content, and the surface is coated with insulating paint to form a core sheet.

2.2 Fasteners (Clips)

The main function of the clamp is to fix the iron core and ensure that the iron core maintains a stable position and shape during the operation of the transformer. (Clamp, insulation tube, insulation pad, ground strip, foot insulation)

When the transformer is running, the iron core will be affected by many factors such as electromagnetic force, vibration and temperature change, if there is no clamp fixed, the iron core may be displaced, deformed, and then affect the performance and normal operation of the transformer.

2.3 Izolyatsiya komponentlari

Insulation plays a vital isolating role in the transformer core, which is used to isolate the electrical connection between the core and the winding to prevent the occurrence of short circuit faults.

During the operation of the transformer, alternating current in the winding will generate high voltage. If there is no good insulation between the iron core and the winding, the current may flow directly from the iron core to the winding, resulting in short circuit and damage to the transformer. Insulation parts are usually made of materials with good insulation performance, such as insulating paper, insulating cardboard, epoxy resin, etc.

2.4 Ground lug

The ground strip is used to ground the non-magnetic part of the iron core, its main purpose is to reduce eddy current losses and ensure the safety of the transformer operation.

When the transformer is running, the iron core is in an alternating magnetic field, which will generate induced electromotive force. If the iron core is not grounded, the induced electromotive force will generate eddy currents in the iron core, causing the iron core to heat up, increasing energy loss, and possibly even damaging the iron core.

2.5 Auxiliary Components

In addition to the above main components, the transformer core also includes other components such as pads and fasteners.

The pad is mainly used to support the iron core and reduce the vibration and noise of the iron core during operation.

Fasteners are used to fix the core to the frame of the transformer, ensuring that the core can remain stable under various working conditions.

3. The transformer core structure classification

Transformer core according to the structure shape classification can be divided into: core-type va shell type.

3.1 Core Type Iron Core

Core core is a more common iron core structure in transformers, which presents a ring structure, usually composed of multiple silicon steel sheets laminated.

In the winding distribution, the high voltage winding and the low voltage winding are respectively around the inner and outer sides of the iron core. When the transformer is connected to the AC power supply, the alternating current is generated in the winding, and then the alternating magnetic flux is generated in the iron core, and the magnetic flux mainly passes through the central part of the iron core to form a closed magnetic circuit.

3.2 Shell type iron core

Shell core structure is characterized by chig'anoq, also by a plurality of silicon steel sheet laminated.

The winding is located inside the core and is surrounded by the core. When working, the alternating current generates alternating magnetic flux in the winding, and the magnetic flux passes through the inner and outer sides of the iron core to form a closed magnetic circuit.

4. the core laminated type

In shell and core transformer structures, in order to install the coil windings, individual sheets are stamped or stamped out from larger steel plates and formed into thin steel bars similar to the letters "E", "L", "U" and "I".

5. Three, Fbizning, FIve Limb Cores

5.1 Three Limb Core

Widely used in general three-phase power transformers, including distribution transformers, small power transformers, etc., in urban and rural power grid transformation, factory internal power supply system, commercial buildings and residential power supply and other scenarios.

5.2 To'rt Limb Core

It is generally used for single-phase large-capacity transformers or special transformers with special requirements, such as large electric furnace transformers, rectifier transformers, etc.

5.3 Besh Limb Core

It is mainly used in large-capacity power transformers, especially in some ultra-high voltage and large-capacity substations, and in occasions where the transport size is strictly limited.