The difference between a high-frequency transformer and a low-frequency transformer

Custom inductor manufacturer tells you

High-frequency transformers refer to transformers that work at high frequencies and play the role of energy exchange. Because the frequency of magnetic field is very high, eddy currents will be generated in silicon steel plates (small magnets in silicon steel plates cannot keep up with the conversion speed). Therefore, high-frequency transformers generally use "high-frequency ferrite" as the magnetic core.The difference between high frequency transformer and low frequency transformer lies in the difference in working frequency, which leads to some difference in material selection.Low-frequency transformer and high-frequency transformer work on the same principle, regardless of the high or low working frequency, are through electromagnetic induction to transmit energy.

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Due to the difference in frequency between high frequency and low frequency, high frequency can only be used in the circuit with high frequency and the excitation source frequency matches the transformer frequency, while low frequency is the opposite and cannot be mixed, even if the high frequency cannot be used if the frequency does not match.

If certain transformer transmission energy, high working frequency, the number of transmission energy within a certain amount of time, every time transfer the energy can be less, the transformer with fewer materials, structure size is small, so the general of high-frequency transformer, coil number of turns is relatively small, size is very small, can do more low frequency transformer coil number of turns.

In the case of two transformers of the same power, the high-frequency transformer will be much smaller than the low-frequency transformer. In this case, the high-frequency transformer will be only about one-tenth of the low-frequency transformer.This is because the low-frequency transformer needs to be protected to reduce the U value. It is made of silicon steel, but the efficiency is poor, so it needs to do a large volume of heat dissipation.

Nowadays, when many electronic enthusiasts choose audio power amplifier transformer, they choose ring transformer. The audio power amplifier USES ring transformer because of the characteristics of audio power amplifier.

Different from other equipment, the power consumption of audio amplifier not only changes fast, but also changes greatly.This requires that the transformer must have strong instantaneous overload capacity and fast response speed, otherwise it will be easy to form noise, sound is not full, sound quality is not good, etc..Due to its large capacity and nearly zero delay response of the direct coupler in the same volume, the ring transformer can satisfy the characteristics of audio power supply.

Advantages of ring transformer used in audio amplifier:

1. High electric efficiency iron core has no air gap and high stacking coefficient.

2. Small overall size and light weight. The weight of ring transformer can be reduced by half compared with that of laminated type transformer.

3, the magnetic interference is small, ring transformer core has no air gap, winding evenly around the ring core, this structure leads to small magnetic leakage, electromagnetic radiation is also small.

4, vibration noise is small, there is no air gap in the core can reduce the noise of the core induction vibration, winding evenly wrapped around the ring core, effectively reduce the magnetostrictive caused by the "buzz".

5, low operating temperature due to iron loss, iron loss is very small, core temperature rise is low, the winding in the low temperature core heat dissipation is good, so the transformer temperature rise is low.

6. Easy to install. The ring transformer has only one mounting screw in the center, which is especially easy to install and disassemble in the electronic equipment.

Specializing in the production of various types of color ring inductors, beaded inductors, vertical inductors, tripod inductors, patch inductors, bar inductors, common mode coils, high-frequency transformers and other magnetic components.


Post time: Aug-15-2020