1, the first is electric field coupling charging. First, there are two sets of asymmetrical electric dipoles on the phone and charging device. When they are close together, they produce a coupling phenomenon and achieve the transmission of current. inRide efficiency is good, but there is a distance limit, the need for a large capacity charging station. The second type is magnetic resonance charging, which is different from the above electric field. This method generates electrical energy through the resonance of the same frequency magnetic field generated by the resonators at both ends.
2, the principle of wireless charging is that through near-field induction, the wireless charging device conducts energy to the charging terminal device, and the terminal device converts the received energy into electrical energy, which is stored in the battery of the device. The principle of energy conduction is inductive coupling, which ensures that there is no exposed conductive interface. It can not only eliminate the messy transmission line between the equipment, but also for the electrons such as electric toothbrushes, which are often in contact with conductive media such as liquidsDevices are also more secure.
3, electric field coupled wireless charging, the principle is to transmit power by coupling two groups of asymmetric dipoles along the vertical direction of the induced electric field generated. Suitable for short distance charging, high conversion efficiency, the position can not be fixed; However, the disadvantage is that it requires a large volume of equipment and less power.
4, now everyone uses a new way of mobile phone charging, that is wireless charging. So what is the principle of this wireless charger? Wireless charging methods include electromagnetic induction, magnetic resonance, electric field coupling and radio wave transmission, and wireless charging of mobile phones is mostly usedIs the principle of electromagnetic induction. 5, we usually think that electricity and magnetism are related, so in talking about the principle of wireless charging, mostly based on electromagnetic induction phenomenon or derived from it. At present, there are four main ways to achieve wireless power transmission: magnetic field induction to a certain frequency of alternating current in the primary coil, through electromagnetic induction to generate a certain current in the secondary coil, so as to transfer energy from the transmission end to the receiving end.
6, there are three main wireless charging technology routes: electromagnetic induction, radio wave and magnetic resonance. Among them, the electromagnetic induction type is the eye>2, wireless fast charging is a combination of wireless charging technology and fast charging technology, and the mainstream models on the market now support wireless fast charging technology. Wireless fast charging mobile phones are Xiaomi Huawei P40, Mate30, Mate30 pro and so on. Wireless charging technology Because the charger and the electrical device transmit energy by magnetic field, the two are not connected by wires, so the charger and the electrical device can be no conductive contact exposed.
3, wireless fast charge is to use the principle of electromagnetic induction, there is a coil in the sending and receiving end, the sending end coil is connected to the wired power supply to generate electromagnetic signals, and the receiving end coil is sensedThe electromagnetic signal should be sent to generate a current to charge the battery, which can be simply understood as a transformer without a magnetic core. Compared with wired, wireless charging has less loss to the battery, and wireless charging technology is more convenient and has lower charging heat.
Wireless charging methods are electromagnetic induction, magnetic resonance, electric field coupling and radio wave transmission, wireless charging of mobile phones is mostlyThe principle of electromagnetic induction is adopted. Electromagnetic induction wireless charging, when the current of the power supply through the coil (wireless charger's power supply coil) will generate a magnetic field, other unenergized coil (mobile phone side of the electric coil) close to the magnetic field will generate current, charging the mobile phone.
Wireless charging mainly uses electromagnetic induction, magnetic field resonance, radio waves, electric field coupling and other principles. Wireless charging Because the charger and the electrical device transmit energy by magnetic field, the two are not connected by wires, so the charger and the electrical device can be no conductive contact exposed.
The basic principle of wireless charging, that isThe current is converted into a magnetic field, which is transmitted through the air and then converted into a current to be transmitted to the intelligent terminal. When the system works, the input end converts the AC mains into direct current through the full bridge rectifier circuit, or uses the 24V direct current end to supply power to the system directly. After passing through the power management module, the output direct current is converted into high-frequency alternating current through the 2M active crystal oscillator inverter to supply the primary winding.