Views: 1 Author: Site Editor Publish Time: 2023-05-15 Origin: Site
In the field of cell phones, computers and other consumer electronic products rapid development, wireless charging as a safe, - fashionable, convenient new charging method, more and more favored by the majority of consumers. Wireless charger is from the 220V power supply into sympathetic electromagnetic field, then sympathetic electromagnetic field and then generate a sympathetic electromagnetic field, from the sympathetic electromagnetic field into current charging; sympathetic electromagnetic field encounter metal, it will produce electron vortex, electron vortex will produce skin effect on the metal, generate heat on the metal, reduce the charging efficiency, waste electricity, so there is low charging efficiency, charging heat and other defects.
Wireless charging magnetic separator sheet In mobile devices such as smartphones where wireless charging is applicable, the receiving coil and ferrite magnetic separator sheet carried require to be as thin as possible. However, the characteristics and thickness of the magnetic material need to be carefully designed. This is because if the magnetic sheet is too thin, it can cause magnetic saturation problems. If magnetic saturation occurs, the inductance of the coil will suddenly decrease, which may cause obstacles to the wireless charging process. The wireless charger is a device that uses the principle of electromagnetic wave induction for charging, there is a coil at the transmitter and a coil at the receiver, the coil at the transmitter is connected to the wired power supply to generate electromagnetic signal, the coil at the receiver senses the electromagnetic signal at the transmitter to generate current to charge the battery; the magnetic separation sheet is attached to the antenna at the transmitter to enhance the magnetic field strength of the coil and has a high magnetic convergence effect; the magnetic separation sheet is placed at the antenna at the receiver It prevents the attenuation interference of magnetic field by metal conductor, plays the role of metal isolation, prevents energy waste and improves charging efficiency.
The addition of a magnetic isolation sheet in wireless charging systems serves several important purposes.
Prevents interference: The magnetic isolation sheet helps prevent electromagnetic interference (EMI) between the wireless charging coil and other EMI can disrupt the functioning of electronic circuits and cause performance issues. By isolating the magnetic field generated by the coil, the sheet reduces the potential for interference.
Increases charging efficiency: The isolation sheet helps to direct the magnetic field generated by the charging coil towards the intended receiving It acts as a shield, focusing the magnetic flux in the desired direction and reducing wasteful leakage of the field in other directions. This improves the efficiency of energy transfer from the charging pad to the device being charged.
Enhances safety: The isolation sheet provides a physical barrier between the charging coil and other sensitive components in the device. This helps prevent potential damage caused by magnetic fields interfering with the operation of nearby electronic components. It also reduces the risk of unintended heating or induction in components that are not designed to handle magnetic fields.
Minimizes interference with other devices. Wireless charging systems are designed to operate within specific frequency ranges. The magnetic isolation sheet helps contain the magnetic field within the charging area, reducing the likelihood of interference with other electronic devices operating in the vicinity. This is particularly important in environments where multiple wireless charging devices are used simultaneously, such as public charging stations.
The magnetic isolation sheet plays a crucial role in optimizing charging efficiency, reducing interference, and ensuring the safe and reliable operation of wireless charging systems.
1. Magnetic conductivity
As we all know, the principle of the magnetic barrier QI wireless charging standard is electromagnetic induction. The primary coil (wireless charging transmitter) produces an interactive magnetic field (with changing strength and direction), and the magnetic field emitted by the primary coil is guided to the secondary coil (wireless charging receiver) in order to allow the magnetic field to work as much as possible.
2. Magnetic blocking
The magnetic sheet should not only be able to conduct the magnetism effectively, but also play a role in blocking the problem. Why do we need to block the magnetism? We know that when the changing magnetic field encounters a conductor such as metal, if the metal is a closed wire will generate current, if the metal is a non-closed wire especially a block of metal, it will produce eddy current effect.
3. Heat dissipation
The magnetic field acts on the inductor coil to generate high frequency current, in the process the coil itself will also generate heat, this heat will gather if it is not effectively dissipated. Sometimes we feel that when wireless charging is carried out, the heat is very strong. This is usually caused by the inductor coil heating or circuit board heating.