This article gives you a talk about the wireless charging transformer coil, as well as the transformer charger internal wiring diagram corresponding knowledge points, I hope to help you, do not forget to collect the site oh. < / p > < h2 > the article directory list: < / h2 > < ul > < li style = 'margin - bottom: 3 px; list-style: none'>1. How do phones charge wirelessly?
Connect the standard charger and data cable of the mobile phone to the wireless charger, and then put the mobile phone in the center position of the left and right of the wireless charger base, you can realize wireless charging, the indicator light will have a breathing effect, 5 seconds later, plug and play, convenient and quick.
Mobile phones use wireless charging, you need to buy a wireless charging base or wireless charging back case to use. Connect the charger to the wireless charging base, and then place the phone or a phone with a wireless charging back case on the wireless charging base. Take off the holster If the phone's holster is too thick or not the original charging holster, it may affect the charging effect, it is recommended to take off the holster and try charging.
Electromagnetic induction technology is the first generation of mobile phone wireless charging representative, through the primary coil to transmit a certain frequency of alternating current, the use of electromagnetic induction in the secondary coil to generate current, wireless transmission of energy. But this kind ofAt present, the technology can only achieve single-to-single, short-distance (within 1cm) charging, and the power is limited to 5 watts, which can not achieve single-to-multiple charging like WiFi.
1, wireless charging is also known as inductive charging or non-contact inductive charging, based on the principle of electromagnetic induction, it is not necessary to transmit electricity to the device like the traditional wired charger, but the device that needs to be charged can be charged by contacting the wireless charging base.
2, the basic principle of wireless charging, is to convert the current into a magnetic field, magnetic fieldAfter transmission through the air, it is converted into current and transmitted to the intelligent terminal. After charging the battery and passing through the power management module, the DC output is converted into high-frequency alternating current through the 2M active crystal oscillator inverter to supply the primary winding. By coupling the energy of the two inductors, the electrical output of the secondary coil is changed into direct current through the receiving conversion circuit to charge the battery.
3, the wireless charging source is installed inside a electromagnetic coil, after the power switch is turned on, the electromagnetic coil converts the electric energy of the power supply battery into a large amount of magnetic energy, and then uses a reverse coil (international standard brick QI coil) to receive this large amount of magnetic energy and convert it into electrical energyPass a metal output head into our device reserve battery. Wireless charging Because electromagnetic transmission only needs to be transmitted in space, no medium is required, so wireless charging can be carried out.
4, the basic principle of wireless charging is to convert the current into a magnetic field, and the magnetic field 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.
Wireless charger is actually the use of electromagnetic induction principle for charging equipment, similar to a transformer, there is a coil at both ends of the sending and receiving, the sending end of the coil connected to the wired power supply to generate electromagnetic signals, the receiving end of the coil induction of the sending end of the electromagnetic signal to generate current to the electrical equipment. As shown in the figure below, current flowing through the coil creates a magnetic field. The proximity of other unenergized coils to a magnetic field generates an electric current.
Using the principle of electromagnetic induction charging equipment, its principle is similar to the transformer, through the transmitter and receiver end set coil, transmitter coil under the action of power to send electromagnetic signals, the receiving end coil receives electromagnetic signals and convert electromagnetic signals into current, so as to achieve the purpose of wireless charging.
Similar to a transformer, a certain frequency of alternating current in the primary coil creates a certain current in the secondary coil through electromagnetic induction, thereby transferring energy from the transmitting end to the receiving end. The conversion efficiency is high and the cost is cheap, but the transmission distance is short and it is easy to be affected by the placement position. Wireless chargingThe biggest advantage is convenience.
Now there are probably two mainstream wireless charging methods, one is electromagnetic induction, such as wireless charging of mobile phones. The other is the resonant type, that is, magnetic resonance. Their wireless charging principle is easy to understand, see below for details.
It's not high-tech, it's using magnetic fields! The charger has a coil, the battery has a coil, and when you put it close, it forms something like a transformer. But it's very inefficient, and it's very radioactive. Below is a picture of wireless power transmission made by intel, which can light bulbs, but not too efficientOver 50%, and the radiation is huge. Wireless chargers are not yet popular and large-scale retail.
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