Transformers are devices that transform AC voltage, current and impedance, and are often used to provide power supply, overall power supply, coupled signals and matching impedance, etc.
Transformer structure
The transformer is mainly composed of three parts, iron core, winding and other components.
1. Iron core
The iron core is the main body of the transformer, which is divided into two parts: iron core column and magnetic yoke. Among them, the iron core column pig dog main magnetic circuit, and the magnetic yoke makes the magnetic circuit form a closed loop.
At the same time, in order to reduce the internal and eddy current loss and hysteresis loss of the iron core, the iron core is often made of silicon-containing steel sheets.
2.Winding
The winding is the circuit part of the transformer, which is wound by copper or aluminum insulated wire. The function of the winding is to generate alternating magnetic flux and induced electromotive force when passing alternating current.
The common winding methods of the winding in the iron core are mainly the same core type and segmented type.
The same core type is to wind the power supply end winding on the inner layer, add insulation material, and then wind the load end winding on the outer layer; the segmented type is to wind the power supply end and load end winding of the transformer on the iron core separately.
3. Other components
Take a typical oil-immersed power transformer as an example, other components mainly include the body, oil tank, transformer oil, radiator, insulating bushing, tap changer and relay protection device.
