The working principle and production process of power transformers

A transformer is a device used for converting electrical energy, which can increase or decrease the voltage of alternating current to meet the needs of different circuits. The working principle of transformers is based on the principle of electromagnetic induction. Below, we will provide a detailed introduction to the production process and working principle of transformers.

• The production process of transformers

The production process of transformers mainly includes the following steps:

1. Preparation materials: The main materials for transformers include iron cores, coils, and insulation materials. Prepare corresponding materials according to the specifications and design requirements of the transformer.

2. Coil winding: According to the design requirements, the wire is wound on the iron core to form primary and secondary coils.

3. Assembly: Assemble the wound coil, iron core, and other components together to form a complete transformer.

4. Testing: Test the assembled transformer to check whether its electrical and mechanical performance meets the design requirements.

5. Packaging: Qualified transformers are packaged for delivery and use after testing.

• Working principle of transformers

The working principle of a transformer is based on the principle of electromagnetic induction, as follows:

When alternating current passes through the primary coil, an alternating magnetic field is generated, which passes through the iron core and generates induced electromotive force in the secondary coil.

Due to the electromagnetic coupling between the secondary coil and the primary coil, the induced electromotive force in the secondary coil is proportional to the current in the primary coil.

Therefore, by changing the current in the primary coil (i.e. changing the applied voltage), the induced electromotive force in the secondary coil can be changed, thereby achieving an increase or decrease in voltage.

4. In addition, according to the law of electromagnetic induction, the induced electromotive force is proportional to the number of turns in the coil. Therefore, by changing the number of turns in the coil, the voltage can also be increased or decreased.

In short, a transformer is an electrical energy conversion device based on the principle of electromagnetic induction, which can increase or decrease the AC voltage by changing the number of coil turns or the applied voltage. The production process of transformers includes steps such as preparing materials, winding coils, assembling, testing, and packaging. Understanding the production process and working principle of transformers helps to better understand and apply this important electrical equipment.