Why is the low-voltage winding of the transformer on the inside and the high-voltage winding on the outside?

As an important part of modern electrical equipment, transformers are often used to transform the voltage of alternating current for use in different situations. The reason why the transformer can complete such a transformation work is that on the one hand it has two or more coils inside it, called high-voltage windings and low-voltage windings, which carry energy of different voltages, on the other hand because these coils The location and the special arrangement of the structure. Specifically, the low-voltage winding of the transformer is often placed inside, while the high-voltage winding is outside. Behind this special design scheme, many disciplines and theoretical knowledge are involved, including electrical engineering, electromagnetics and physics, and it is also related to the transformer. The use and safety are closely related.

First of all, we need to make it clear that one of the main functions of a transformer is to complete voltage conversion. During the process, the voltage between the input end (high voltage side) and the output end (low voltage side) of the transformer will change accordingly. Among all transformers, the current carried by the coil of the low-voltage winding is relatively large, so it is necessary to arrange a sufficient space inside the transformer to accommodate this larger coil. The current carried by the high-voltage winding is relatively small, so it only requires a smaller space. This is the main reason why high voltage windings are often placed externally.

Secondly, another important reason why the low-voltage winding of the transformer is arranged inside is to ensure the safety of the transformer. Although alternating current is used inside the transformer, the internal circuit structure is very special, so a magnetic field effect is produced, which will also affect the surrounding environment of the transformer. Therefore, the transformer should reduce the disturbance range of its magnetic field as much as possible. If the low-voltage winding is placed outside, the magnetic field effect generated will directly affect its surroundings, thus negatively affecting the human body and other equipment. To avoid this happening, the low voltage winding is often placed internally. In this way, the magnetic field effect is limited to a relatively small space, and the impact on the surrounding environment is reduced.

In addition, the structure of the transformer is also a factor that needs to be considered. The internal structure of a transformer is very complex and consists of many components and materials. The effective space to consider is also very important. Therefore, by placing the low-voltage winding inside, the internal space of the transformer can be used more effectively, making the overall transformer more compact and sturdy, making it easier to transport, maintain and install.

Finally, it is important to note that transformer designs are often optimized for different application scenarios. There are many possible application scenarios, including industrial use, outdoor use, distribution systems in cities and home renovations, to name a few. For each scenario, there will be special requirements and considerations during the transformer design process. Therefore, in actual use, some transformers may have high-voltage windings placed inside and low-voltage windings placed outside. This is mainly based on actual usage requirements and needs to be flexibly adjusted according to actual conditions.

In short, the low-voltage winding of the transformer is placed inside and the high-voltage winding is placed outside. This is a special design solution, which involves more engineering and theoretical knowledge. The advantage of this design is to ensure the safety and reliability of the transformer, as well as better use results. It needs to be specially optimized according to different application scenarios to better meet the needs of users.