Characteristics and advantages of high frequency transformer

A typical secondary winding of a high-frequency transformer has several coils in parallel. Each secondary winding is coupled to the same primary winding. Therefore, the number of ampere-turns generated by the secondary winding current is equal to the number of ampere-turns generated by the primary winding (ignoring the excitation current). This property is particularly useful for parallel rectifier circuits. The winding current is equally distributed, so it is not necessary to equalize the current resistance or add other components in the parallel rectifier circuit.
Very high current density
High frequency transformer has excellent temperature rise characteristic design. Because of these characteristics, it can achieve a very high current density in a very small package.
High efficiency
Adjust the leakage inductance, so that it can have a fast switching time, very low cross loss, can make it achieve a high efficiency. The turn-to-turn conduction loss between the secondary winding and the primary winding of the transformer is very small.
High power density
Because of the small size of the high-frequency transformer component, it has excellent temperature dissipation characteristics, so it can be tightly packaged with the relevant semiconductor devices and inductors to achieve high power density. Its current density can be 30A/ module.
Low cost
The whole high-frequency transformer is composed of a small number of cheap components, coupled with the assembly is very convenient, so the cost of the transformer is very low.
Save on the cost of the parts connected to it
Because its leakage inductance is very small, the switching loss is very low, and the stress placed on the components connected with it is reduced. Therefore, the components connected with it can use low-cost parts with low power quotas.
Excellent heat dissipation characteristics
High-frequency transformers are small components with a high surface area to volume ratio and a very short hot channel. Good for heat dissipation. The turn to turn loss between primary and secondary windings is very small. The unique geometry of the magnetic core can effectively reduce the loss of the magnetic core. So it can achieve a high magnetic flux density. It can operate between -40 ° C and 130 ° C. low
Leakage inductance
Good coupling between windings can keep the leakage inductance between turns at a minimum. The connection between the output and the auxiliary parts is short and tightly assembled, so the leakage inductance on the connection between the windings is also minimal.
Excellent high frequency characteristics
Before this, when the transformer is operated at high frequencies, the switching loss will increase and the transformer will overheat. The emergence of flat transformers has solved these problems. The flat transformer can be designed as a high frequency transformer, providing an economical and good transformer module. It can operate between 100kHz and 500kHz.
Simple structure
High-frequency transformers are composed of a small number of components and a minimum of windings, and this module is particularly suitable for automated assembly.
Low profile
The magnetic core used in a flat transformer is small and can be arranged on the surface of a flat plate. The shape of each core unit is in the range of 8mm - 25mm.
High insulation strength
High-frequency transformers are easy to insulate according to the required number and thickness of insulation layers. Dielectric insulation can be carried out according to the requirements of customers for leakage distance. The withstand voltage between primary and secondary windings is greater than 40000V.