This article gives you a talk about wireless charging coupling, and the working principle of wireless coupler corresponding knowledge points, I hope to help you, do not forget to collect this site. < / p > < h2 > the article directory list: < / h2 > < ul > < li style = 'margin - bottom: 3 px; list-style: none'>1. Why can't mobile phonesLine charging? How does it work?
1, wireless charging methods include electromagnetic induction, magnetic resonance, electric field coupling and radio wave transmission, wireless charging of mobile phones mostly uses the principle of electromagnetic induction. 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. As shown below.
2, wireless charging mainly uses electromagnetic induction, magnetic 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.
3, the reason why mobile phones can achieve wireless charging is to rely on electromagnetic induction, radio waves, magnetic resonance and electric field coupling and other ways to achieve. Its different ways, based on the relevant principles are not the same, the details are as follows. Electromagnetic induction wireless charging principle This wireless charging method is relatively in the current marketThe popular principle of wireless charging depends on the effective conversion of magnetic energy and electrical energy.
1, the basic principle of wireless charging is to convert the current into a magnetic field, which is transmitted through the air and 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. <2, wireless charging system mainly uses the principle of electromagnetic induction. Wireless charger refers to the charger that does not need to be connected to the terminal device that needs to be charged without the traditional charging power cord, using the latest wireless charging technology, through the use of the magnetic field generated between the coils, the magic transmission of electrical energy, inductive coupling technology will become a bridge connecting the charging base station and equipment. 3, wireless charging, also known as inductive charging or non-contact inductive charging, based on the principle of electromagnetic induction, do not need to be like the traditional wired charger need to transmit cables to the device, but will need to charge the device and wireless charging baseThe terminal device converts the received energy into electrical energy and stores it in the battery of the device. The principle of energy conduction is inductive coupling, which can ensure that there is no exposed conductive interface, which can not only save the messy transmission line between the equipment, but also be safer for electronic devices such as electric toothbrushes that are often in contact with conductive media such as liquids.
The principle of wireless charging technology is electromagnetic induction, magnetic field resonance, radio wave and so on. Electromagnetic induction type primary coil a certain frequency of alternating current, through electromagnetic induction in the secondary coil to produce a certain current, thereby transferring energy from the transmission end to the receiving end.
Test results show that the wireless transmission distance is about 15 centimeters, but Fujitsu says that wireless transmission distance can eventually be achieved several meters. It should be pointed out that the further away from the device, the more power lost in transmission. Fujitsu's system is similar to technology developed by Witricity, an American company, which also uses magnetic resonance to transmit electricity over distances of several meters.
Generally about 0.9-2 meters high-power wireless charging transmission distance up to 5 meters wireless charging technology can be divided into low-power wireless charging and high-power wireless charging two ways. Low powerWireless charging often uses electromagnetic induction, such as the Qi method of charging mobile phones, but ZTE's electric vehicle wireless charging method uses induction.
The principle is to use electromagnetic induction, that is, to divide a transformer into two halves, rely on electromagnetic induction to charge the part to get the corresponding voltage. Wi-Fi, the Chinese name for wireless fidelity, is a technology that can connect terminals such as personal computers and handheld devices (such as pads and mobile phones) to each other wirelessly, in fact, it is a high-frequency radio signal.
1, wireless charging methods include electromagnetic induction, magnetic resonance, electric field coupling and radio wave transmission, wireless charging of mobile phones mostly uses the principle of electromagnetic induction. 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. As shown below.
2, the working principle of the wireless charger: the principle of electromagnetic induction, through the coil energy coupling to achieve energyDeliver. 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.
3, wireless charging system mainly uses the principle of electromagnetic induction. Wireless charger refers to the charger that does not need to be connected to the terminal device that needs to be charged without the traditional charging power cord, using the latest wireless charging technology, through the use of the magnetic field generated between the coils, the magic transmission of electrical energy, inductive coupling technology will become the connection of the charging base station andBridge of equipment.
4, electromagnetic induction primary coil of a certain frequency of alternating current, through electromagnetic induction in the secondary coil to produce a certain current, so as to transfer energy from the transmission end to the receiving end.
5, it is the first generation of mobile phone wireless charging, the technology is mature, but can only be single-to-single short-range charging (qi standard, within 1cm, within 5 watts), and can not be similar to WiFi single-to-multiple charging.
6, finally put the phone on the unlimited charger, note that the wireless charging induction area of the phone is generally the middle of the phone.
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