Three-phase Dry Type Transformer

Three phase dry-type transformers are the main components of various power sources and electrical equipment. It is a device that uses the principle of electromagnetic induction to change the AC voltage. The main components are the primary coil, secondary coil, and iron core (magnetic core).

Three phase dry-type transformers are the main components of various power sources and electrical equipment. It is a device that uses the principle of electromagnetic induction to change the AC voltage. The main components are the primary coil, secondary coil, and iron core (magnetic core). In electrical equipment and wireless circuits, it is commonly used for voltage regulation, impedance matching, safety isolation, etc. In a generator, whether the coil is moving through a magnetic field or the magnetic field is moving through a fixed coil, it can induce electromotive force in the coil. In both cases, the value of magnetic flux remains unchanged, but the number of magnetic flux intersecting with the coil changes. This is the principle of mutual inductance. A transformer is a device that utilizes electromagnetic mutual inductance to transform voltage, current, and impedance

Important components

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1. Iron core material:

The iron core materials used in transformers mainly include iron sheets, low silicon sheets, and high silicon sheets. Adding silicon to the steel sheets can reduce their conductivity, increase their resistivity, reduce eddy currents, and reduce their losses. We usually refer to steel sheets with added silicon as silicon steel sheets. The quality of the silicon steel sheets used in transformers is closely related, and the quality of silicon steel sheets is usually represented by magnetic flux density B. Generally, the B value of black iron sheets is 6000-8000, low silicon sheets are 9000-11000, and high silicon sheets are 12000-16000.

2. The materials commonly used for winding transformers include

Enamel wire, sandbag wire, silk wire, the most commonly used enamel wire. The requirements for wires are good conductivity, sufficient heat resistance of the insulation paint layer, and certain corrosion resistance. In general, it is best to use high-strength polyester enameled wire of Q2 model.

3. Insulation materials

In winding transformers, insulation materials are used for the isolation between the coil frame layers and the winding layers. Generally, the transformer frame material can be made of phenolic cardboard, the layers can be isolated with polyester film or telephone paper, and the windings can be isolated with yellow wax cloth.

4. Impregnating material:

After the transformer is wound, the final process is to impregnate the insulation paint, which can enhance the mechanical strength of the transformer, improve insulation performance, and extend its service life. Generally, cresol varnish can be used as the impregnating material.

Widely used in industrial and mining enterprises, postal and telecommunications, textiles, railways, construction sites, schools, hospitals, hotels, national defense, scientific research and other departments for electronic computers, precision machine tools, computer tomography (CT), precision instruments, experimental devices, elevators, imported equipment, and production lines as AC stabilized power supplies. It is also suitable for low-voltage distribution with low power supply voltage and large fluctuation amplitude