High-frequency transformers are power transformers with operating frequencies exceeding medium frequency (10kHz). They are mainly used as high-frequency switching power supply transformers in high-frequency switching power supplies. They are also used in high-frequency inverter power supplies and high-frequency inverter welding machines. High frequency inverter power transformer.

High-frequency transformers have many characteristics such as small size, isolation, voltage stabilization, and current conversion. They play a vital role in automation systems and are an ideal high-frequency transformer unit. The electrical unit is also a high-tech product.

Characteristics of high-frequency transformers

1. High-frequency transformers with a volume less than 30L are not within the scope of national inspection products. They are easy to use and do not need to apply for a boiler usage certificate.

2. The high-frequency transformers are all assembled by steam boilers and burners. The installation is very reasonable, energy-saving, environmentally friendly, and space-saving.

3. The high-frequency transformer adopts advanced automatic control, so the operation of the equipment is basically completed by computers and has superior intelligence.

So what are the characteristics of high frequency transformers?

1. Current distribution

A typical high-frequency transformer secondary winding has several parallel coils. Each secondary winding is coupled to the same primary winding. Therefore, the number of ampere-turns generated by the secondary winding current is the same as the number of ampere-turns generated by the primary winding (ignoring the excitation current). This characteristic is particularly useful for parallel rectifier circuits. The winding current is distributed equally, so there is no need for current-sharing resistors or other components in the parallel rectifier circuit.

2. High power density

Because the size of the high-frequency transformer component is small and it has excellent temperature dissipation characteristics, it can be closely connected with the related semiconductor devices and inductors. packaged together to achieve high power density. Its current density can reach 30A/module.

3. High power

Adjusting the leakage inductance so that it can have fast switching time and low penetration loss can achieve high power. The interturn conduction loss between the secondary winding and the primary winding of this transformer is very small.

4. High current density

High-frequency transformers have excellent temperature rise characteristics. Because of these characteristics, it can achieve high current density in a small package.

5. Low cost

The entire high-frequency transformer is composed of a few related cheap components, and it is easy to assemble, so the cost of the transformer is very low.

6. Save the cost of the components connected to it

Because its leakage inductance is very small and the switching loss is very low, the stress on the components connected to it is reduced. Therefore, the components connected to it can use lower-cost, low-power-rated components.

7. Excellent heat dissipation characteristics

High-frequency transformers are small components with a high surface area to volume ratio and very short heat channels. Helps dissipate heat. The inter-turn losses between the primary and secondary windings are very small. The unique geometric shape of this magnetic core can effectively reduce core losses. So it can achieve high magnetic flux density. It can operate between -40℃ and 130℃.

8. Low leakage inductance

Good coupling between windings can keep the leakage inductance between winding turns at a minimum value. The connection from the output end to the auxiliary components is short and tightly mounted, so the leakage inductance between the windings is also minimal.

9. Excellent high-frequency characteristics

Previously, when the transformer was operated at high frequency, switching losses would increase and the transformer would overheat. The emergence of flat-panel transformers solves these problems. The flat-panel transformer can be designed as a high-frequency transformer, providing an economical and good transformer module. It can operate between 100kHz-500kHz.

10. Simple structure

High-frequency transformers are composed of a few parts and minimal windings. This module is particularly suitable for automated installations.

11. Low profile

The magnetic core used in a flat-panel transformer is very small and can be placed on the surface of the flat panel. The shape of each magnetic core unit is in the range of 8mm-25mm.

12. High insulation strength

High-frequency transformers can be easily insulated according to the required number and thickness of insulation layers. Dielectric insulation can be carried out according to customer requirements for leakage distance. The withstand voltage between the primary and secondary windings is greater than 40,000V.