This article to talk about wireless charging coil information, as well as wireless charging coil points positive and negative 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, Wireless charging coil windingWhat are the precautions of the circle?
NoneThe considerations for winding coils by wire charging coils mainly include the selection of coils with different frequency characteristics, the selection of magnetic cores of different materials, and the consideration of parameters such as inductance and distributed capacitance of coils. In the wireless charging receiving coil, according to its working characteristics in the audio segment, silicon steel sheet or permalloy is usually selected as the core material.
Ultra-thin multi-strand and winding coil for the receiving end, the use of multiple copper wire side by side winding, effectively reduce the skin effect, to achieve ultra-thin design, improve efficiency. As a key component, the magnetic plate includes nanocrystalline magnetic plate and ferrite magnetic plate, which are respectively subjected to rapid solidification, heat treatment, film lamination, split and other processes>The mobile phone charging method, 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, etc. Wireless charging of mobile phones mostly uses the principle of electromagnetic induction.
2, 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. The DC power output passes through the power management moduleThe 2M active crystal oscillator is converted into high frequency alternating current to supply the primary winding.
3, there are two coils on the phone, when the charging pad is turned on, it will produce a magnetic field. The coil on the phone will generate alternating current, and then convert the alternating current into direct current, we can charge the phone. Although the charging principle is simple, the manufacturing process is really complex and not as simple as we can currently imagine. First of all, the distance of wireless charging is too short, and the effect of wired charging is no different.
Since the introduction of magnetic charging by Apple, the convenience of wireless charging has been loved by consumers, which has promoted the prosperity of the wireless charging accessories market. Chargers recently disassembled MoYi Moyi's 5-in-1 magnetic wireless charger T268, which can charge two iphones at the same time, and also has Apple Watch charging function, with USB-A charging output and nightlight. Next, we will take an in-depth look at the design of this product.
Moi5-in-1 Magnetic Wireless Charger T268: A model of exquisite design and efficient compatibility This innovative charger from Moyi stands out for its 5-in-1 functionality and intelligent design. Designed for wireless charging of both iPhone and Apple Watch devices, this charger is equipped with a USB-A interface and a thoughtful nightlight function, showing careful consideration of user needs.
1, the size of the current is related to the thickness of the coil, andIt's the frequency. Look at the specific circuit, sometimes when the difference in inductance value is not large, the impact on the output voltage and current is not obvious, but it may lead to a large difference in the change in unit period voltage/current, and also lead to the difference in loss and efficiency, so the choice of inductor is reasonable at this time, mainly to see whether it can get better performance under the premise of meeting the size specifications.
2, wireless charging methods are 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 type wireless charging, when the power supply of the currentA magnetic field is generated through the coil (the power supply coil of the wireless charger), and when other unenergized coils (the power supply coil of the mobile phone) are close to the magnetic field, an electric current is generated to charge the mobile phone.
3, electromagnetic induction is the most common working principle of wireless chargers. The transmitter generates a high frequency current through an AC power supply and an alternating magnetic field through an inductor. The inductor at the receiving end senses this magnetic field and converts it into electrical energy to charge the device. The advantage of this method is that the transmission efficiency is high and it is suitable for close charging. Electromagnetic radiation mode Electromagnetic radiation mode is a way of transmitting energy through electromagnetic waves.
A11 is single wire single layer, single wire wound, A11a is double wire double layer, double wire wound. The sensory value is the same.
oppo a11x is not capable of wireless charging. The OPPO A11x is a mobile phone under the OPPO brand. OPPO (Guangdong OPPO Mobile Communication Co., LTD.) is a manufacturer of smart phones, high-end audio and video equipment and mobile InternetProducts and services company, founded in 2004, headquartered in Dongguan City. In 2001, OPPO brand began global registration, and Chen Mingyong served as CEO. Richtek RT3181C wireless transmitter solution with integrated H-bridge power stage and current detection amplifier, optimized for LP-A11 coil solution, external power stage can support high power output, support MP-A5/MP-A11 solution, support programmable temperature protection and fan speed control, This wireless terminal supports 15W wireless charging output. Chisel RT3181C Data lettersBreath. Four PSMN4R2-30MLD, from NEXPERIA, NMOS tubes for wireless charging power output.
The charger as a whole uses an A11 to manage the charging power and choose which charging ring to charge which device, quite a bit of a miracle regardless of cost. However, because so many coils, even if the power is not high, the heat is really difficult to control, Apple is not willing to use fans to increase the noise, and finally after several difficult births, the device died halfway.
ATK8910 is a self-developed chip of Finock Technology, ATK8910 chip is a highly integrated Finock technology self-developed chip, high efficiency SoC wireless power transmitter chip. The ATK8910 chip is compatible with the latest WPCQIv4 standard, supports A11a coil, and supports standard 5W, Apple 5W, Samsung 10W/15W and other charging power.
Before the wireless fast charge industry chain sent two photos of the iPhone 8 wireless charger, in which the PCB board is green style, using the common single-coil architecture on the market at present, composed of A11 coil copper wire and magnetic core, the input voltage is 5V-12V, and the output currentIs 0.6A-2A, output power of 5W-10W, efficiency of 70%-85%, importantly compatible with WPC QI.
4, 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.
5, wireless charging technology is a special way of power supply, it does not need a power cord, relying on electromagneticThe propagation of waves converts electromagnetic wave energy into electrical energy, and finally realizes wireless charging. Low-power wireless charging often uses electromagnetic induction, such as the Qi method of charging mobile phones, and ZTE's electric vehicle wireless charging uses induction mode.
6, the principle of wireless charging technology is "magnetic electricity", simply put, through the charging device and the mobile phone device installed on the two "magnetic equipment" mutual induction and formation of current. At present, products supporting wireless charging have appeared in mobile phones, electric vehicles, smart furniture and other fields. Among them, in the mobile phone industry, the "Qi standard" is the most common in many mobile phones and wireless chargingThe packaging of the device is often marked with Qi labels.
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