Hello everyone, do you know the role of wireless charging with magnetic spacers? Today, the manufacturers of absorbing materials will explain to everyone!
I believe that with the update and iteration of mobile phones too fast, along with its accessories, wireless charging has become more and more standard for smartphones, so follow the footsteps of the editor to understand wireless charging, and why wireless charging needs to be added with magnetic isolation piece.
1) Introduction to wireless charging:
As a safe, fashionable, and convenient new charging method, wireless charging is becoming more and more popular among consumers, and it is developing rapidly in the field of consumer electronic products such as mobile phones and computers.
2) Principle of wireless charging:
The wireless charger changes the 220V power supply into a sympathetic electromagnetic field, and then after the sympathetic electromagnetic field generates a sympathetic electromagnetic field, the sympathetic electromagnetic field turns into a current for charging; when the sympathetic electromagnetic field encounters metal, it will generate electronic eddy currents, and the electronic eddy currents will produce skin on the metal. The effect is that heat energy is generated on the metal, which reduces the charging efficiency and wastes electric energy. Therefore, there are defects such as low charging efficiency and large heat generation during charging.
3) In order to improve the charging efficiency and ensure the safety of use-add a wave-absorbing material and a magnetic isolation sheet
The current mainstream solution is to attach magnetic barrier absorbing materials to the back of the coils at the transmitting and receiving ends of the wireless charger. A wireless charger refers to a device that uses the principle of electromagnetic wave induction for charging. There is a coil at the transmitting and receiving ends. The transmitting end coil is connected to the wired power supply to generate electromagnetic signals, and the receiving end coil induces the electromagnetic signals at the transmitting end to generate current to charge the battery; attaching a magnetic isolation sheet to the transmitting end antenna can enhance the magnetic field strength of the coil and at the same time have a higher magnetic convergence effect; Place a magnetic isolation sheet on the antenna at the receiving end to prevent the attenuation and interference of the metal conductor to the magnetic field, play a role of metal isolation, prevent energy waste, and improve charging efficiency.
The requirements of a good wireless charger for the production of magnetic sheets are:
1) Excellent magnetic properties and high permeability;
2) The magnetic loss of the magnetic sheet in the AC magnetic field is small;
3) The magnetic sheet has good flexibility and will not break when being laminated, otherwise it will cause magnetic flux leakage;