In a high-frequency transformer, what is the difference between 0.9 turns and 1.1 turns of outer copper foil?
In high-frequency transformers, the number of turns of the copper foil shielding layer refers to the number of turns of the copper foil layer covering the outside of the transformer coil. 0.9 turns means that the number of turns of the copper foil layer is slightly less than the number of turns of the transformer coil, while 1.1 full turns means that the number of turns of the copper foil layer is slightly more than the number of turns of the transformer coil.
Differences and effects: 1. Shielding effect: Both 0.9 turns and 1.1 full turns can provide a certain shielding effect, reducing the electromagnetic radiation and sensitivity of the transformer coil to the surrounding environment. The copper foil shielding layer can effectively block external electromagnetic interference and reduce internal electromagnetic radiation.
2. Cause detuning: The 0.9-turn copper foil shielding layer has fewer turns, and the magnetic field coupling of the copper foil shielding layer is less than that of the 1.1 full turn. This may reduce the magnetic field coupling between the transformer coils, resulting in a certain degree of detuning. The 1.1 full copper foil shielding layer has more magnetic field coupling, which may be more likely to cause electromagnetic coupling between the transformer coils, but it may also improve the overall shielding effect.
3. Assembly difficulty and cost: The 0.9-turn copper foil shielding layer with fewer turns is easier to install during the assembly process, and maintenance and heat dissipation are relatively more convenient. In contrast, the installation, maintenance and heat dissipation of the 1.1 full copper foil shielding layer may be more complicated, and will increase some costs.
Taking all factors into consideration, whether to use 0.9 turns or 1.1 full copper foil shielding in high-frequency transformers needs to be determined according to specific design requirements and performance requirements. If you pursue better shielding effect, you can choose a 1.1 full copper foil shielding layer, but you need to pay attention to the possible detuning effect. If it is easy to assemble and dissipate heat, as well as considering cost factors, you can choose a 0.9 turn copper foil shielding layer. The best choice should be based on comprehensive factors such as the operating frequency, power requirements, noise suppression capabilities, cost and design requirements of the specific application.
