The frequency of electricity we use in our daily lives is 50Hz, which we call low-frequency alternating current. If the transformer works at this frequency, we call it a low-frequency transformer, also called a power frequency transformer. This kind of transformer is bulky and has low efficiency. The iron core is stacked with insulated silicon steel sheets, and the primary coil is wound with enameled wire. The primary voltage is proportional to their number of turns.

What is the difference between high frequency transformer and low frequency transformer?

Low-frequency transformers are also called "DC transformers". Normally, the operating frequency of low-frequency transformers is below 50Hz and are used to change voltage. The low-frequency transformers use silicon steel sheet laminated cores with high magnetic permeability. .

High-frequency transformers and low-frequency transformers are different. High-frequency transformers work at high frequencies and can convert energy. As we all know, the frequency of the magnetic field is very high, and vortices will be generated in the silicon steel sheets. There are also differences between high-frequency transformer cores and low-frequency transformers. High-frequency transformers use "high-frequency ferrite" as the magnetic core.

Due to the difference in output power between high-frequency transformers and low-frequency transformers, the selection of materials will be different between them. However, the working principles of low-frequency transformers and high-frequency transformers are the same, and they both transmit kinetic energy through electromagnetic induction.

The frequencies of high-frequency transformers and low-frequency transformers are different. High-frequency transformers can only be used in circuits with very high frequencies and the frequency of the excitation source matches the frequency of the transformer.

The applicable scope of low-frequency transformers is opposite to that of high-frequency transformers. What is particularly important to emphasize here is that the two cannot be mixed. The frequency of high-frequency transformers does not match and must not be used.

The difference between high-frequency transformers and low-frequency transformers lies in the frequency and working frequency, which leads to some differences in material selection.

The working principles of low-frequency transformers and high-frequency transformers are the same. Regardless of the working frequency, energy is transmitted through electromagnetic induction. Since high frequency and low frequency have different frequencies, high frequency can only be used in In circuits with high frequency and the frequency of the excitation source matches the frequency of the transformer, the opposite is true for low-frequency ones and cannot be mixed. Even high-frequency ones generally cannot be used if the frequencies do not match.

If the transformer transmits a certain amount of energy, has a high operating frequency, transmits energy many times within a certain period of time, and can transmit less energy each time, then the transformer uses less materials and has a small structural size, so it is generally High-frequency transformers have fewer coil turns and can be made very small, while low-frequency transformers have more coil turns.

The transformer transmits a certain amount of energy. If the output power is very high, the frequency of transmitting energy will increase within a certain period of time. If the transmitted energy is reduced, the materials used in the transformer will also be reduced, and the structural size of the transformer will also be reduced.

After understanding the above principles, it is not difficult to understand why the high-frequency transformer has very few coil turns and the size of the transformer is also small, but the low-frequency transformer has more coil turns.

If the power of the high-frequency transformer and the low-frequency transformer are the same, the volume of the high-frequency transformer is very small, only 10% of the low-frequency transformer. The low-frequency transformer must be protected and the u-value must be reduced. It must be made of silicon steel sheets, but the efficiency is not good. A more feasible method is to make the low-frequency transformer larger in size to facilitate heat dissipation.