Advantages of high-frequency transformers

March 20, 2023

A high-frequency transformer, a transformer capable of operating in the high frequency range. High Frequency Transformers are widely used in various applications such as power transmission, electronic devices, medical devices, etc.Magnetic loop Inductor

A, the basic definition of high frequency transformer

A high frequency transformer is an electronic device made of magnetic material and Coils. The most significant difference between it and an ordinary transformer is that it can work in the high frequency range higher than 50 Hz. The basic construction of a high frequency transformer is similar to that of a normal transformer in that it contains two or more coils that are separated by a layer of magnetic material. Usually, the magnetic material layer consists of an iron core or ferrite layer.High Frequency Transformers

Second, the working principle of high frequency transformer

The working principle of high frequency transformer is the same as ordinary transformer, it can change the voltage ratio between input voltage and output voltage by changing the turns ratio of coils.

In the high frequency transformer, many interesting phenomena occur due to the high operating frequency. One of the most significant effects is the eddy current phenomenon. Eddy current is a heating and energy loss phenomenon caused by electromagnetic induction. This effect occurs when current flows in a high frequency transformer. To reduce the eddy current effect, high frequency transformers usually use low resistance coils made of thick copper wire, copper tape and copper foil. At the same time, high-frequency transformers usually use shielding on both sides of the coil to reduce the electromagnetic interference effect.Flat Inductor

Third, the application of high frequency transformers
Advantages of high-frequency transformers

Advantages of high-frequency transformers

High frequency transformers have outstanding performance in applications such as power converters, inverters, plasma generators, x-ray generators, magnetic resonance imagers, televisions and computer monitors.

Power converters: High frequency transformers are often used in power converters. The transformer converts the input voltage to a different voltage or frequency.

Plasma generators: High-frequency transformers are widely used in plasma generators. A plasma generator is a high frequency power source that generates plasma in a gas for research.

X-ray generators: High frequency transformers are used in many medical devices, including X-ray generators. These devices require high voltage pulses, and high frequency transformers can provide this energy supply.

Magnetic resonance imagers: High-frequency transformers are used in magnetic resonance imagers to make the current more uniform and stable.

TV and computer monitor: High frequency transformers are also widely used in the inverter circuits of flat screen TVs and computer monitors.

Fourth, the advantages and disadvantages of high frequency transformers

The advantages and disadvantages of high-frequency transformers compared to traditional transformers are as follows.

Advantages
(1) Compared with traditional transformers, high-frequency transformers are more flexible and can quickly change the input and output voltage.

(2) High frequency transformers can provide higher power density, i.e., it can provide higher power output in a smaller space occupied.

(3) Due to the use of high frequency, the coils of high frequency transformers can use smaller wire diameters to put more coils into a smaller space, which results in higher efficiency and also reduces losses more effectively.

Disadvantages
Because high frequency transformers often operate at high temperatures, high frequencies, etc., they require the use of special coils, insulation and materials. This makes the cost relatively high.

V. Manufacturing and testing of high frequency transformers

The manufacturing and testing of high-frequency transformers is very important. The manufacturing process requires the use of special machines and tools to ensure that the quality and size of the coils are accurate. When testing high frequency transformers, many factors need to be considered, such as the use of coaxial cables, filters and attenuators to ensure that the high frequency transformer works within the intended range.

Author:

Ms. Song

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