Mobile Phone Wireless Charging Magnet Magnetic Ring interacts with the charging coil inside the mobile phone mainly through magnetic field coupling.
In the wireless charging system, there is a transmitting coil at the end of the wireless charger, which will pass an alternating current. According to the law of electromagnetic induction, the alternating current will generate an alternating magnetic field around the transmitting coil. Mobile Phone Wireless Charging Magnet Magnetic Ring plays a key role in guiding and enhancing the magnetic field in this process. The magnetic ring usually has a high magnetic permeability, which can concentrate the magnetic field generated by the transmitting coil, enhance the magnetic field strength within a certain range, and constrain the direction of the magnetic field, so that the magnetic field can be more effectively transmitted to the charging coil inside the mobile phone.
When this alternating magnetic field guided and enhanced by the magnetic ring reaches the charging coil inside the mobile phone, according to Faraday's law of electromagnetic induction, the charging coil will induce an electromotive force. Because the charging coil is in a changing magnetic field, the magnetic field lines pass through the coil, causing the magnetic flux in the coil to change, thereby generating an induced voltage at both ends of the coil. The magnitude of this induced voltage is related to factors such as the rate of change of the magnetic field, the number of turns of the coil, and the magnetic field strength guided by the magnetic ring.
The charging circuit inside the phone processes this induced voltage and converts it into direct current suitable for charging the phone battery. In this process, the interaction between the magnetic ring and the charging coil is a dynamic and close process. The properties of the magnetic ring, such as magnetic permeability and magnetic field direction, will affect the efficiency of magnetic field coupling. If the magnetic field direction of the magnetic ring is well matched to the direction of the charging coil, more magnetic lines of force can pass through the charging coil, then the induced electromotive force will be stronger and the efficiency of wireless charging will be higher.
At the same time, this interaction is also affected by factors such as distance and angle. For example, when the position of the mobile phone on the wireless charger is not accurate, resulting in a change in the relative angle between the magnetic ring and the charging coil, or the distance exceeds the effective range, the magnetic field coupling will weaken, the efficiency of wireless charging will be reduced, and it may even fail to charge normally.
