1, wireless coil winding coil precautions mainly include the selection of different frequency characteristics of the coil, the selection of different materials of the magnetic core, and the inductance of the coil, distributionCapacitance and other parameters are considered. 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. 2, from the theory, wireless charging technology is safe and harmless to the human body, the resonance principle of wireless charging is magnetic field resonance, only in the same frequency resonance between the coil transmission, and other devices can not accept the band, in addition, the magnetic field used by wireless charging technology itself is harmless to the human body.
3, wireless charging precautions: do not place metal objects, magnetic stickers, magnetic cards and other foreign objects between the mobile phone and the wireless charger (If the back of the phone is attached to the car magnetic bracket iron), the phone may not be able to charge properly or overheat resulting in damage. Place the mobile phone correctly. If the wireless charging coil deviates too much, the charging efficiency may be low or it cannot be charged. Different brands of mobile phones due to the difference in coil position, may lead to low charging efficiency or can not be charged.
4, 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 processesDie cutting and other steps to meet the needs of different applications.
5, Yes. The operation steps are as follows: First, according to the needs of the circuit, select the winding method: First, determine the size of the inner diameter. Then according to the inductance value and resistance and other factors to determine the coil layer number, height, outside diameter and so on. Wireless charging coil is suitable for short wave, medium wave circuit, its Q value can reach 150-250, and has high stability.
1High charging efficiency. Leeds wire consists of multiple strands of thin wire, each with an insulating layer, which effectively reduces the AC resistance caused by the current flowing across the wire surface. Apple uses the Litz wire in wireless charging, which can improve the charging efficiency by reducing the resistance loss inside the coil.
2, reflected in the flexibility of the coil, in the circuit will not play an anti-interference effect. Instead, it will be used in a wireless charger to act as a charge-discharge coil. Leeds wire toroidal inductors, unlike other toroidal inductors, do not use any skeleton and magnetic ring, but simply use Leeds wireWound on a disc, good flexibility, play a charge and discharge coil role.
3, the coil is wrapped with gauze wire, and the watch magnetic wireless charging coil is wound with Leeds wire, and the built-in magnet ensures that the watch is firmly charged. MoYi Moyi's 5-in-1 wireless charger T268 is the ideal choice for Apple users with its innovative design and multi-functional features.
4, the magnetic wireless charging design is unique, the magnet adsorption force and the wrapped wire or Leeds wire winding complement each other, to achieve a simple and efficient charging experience. Ink a wireless charger more setThere are positive and negative differences.
Wireless charging in addition to the charge can not be directly supplied to the hardware, other aspects have no impact. You said that the injured battery is wireless charging while playing will be far more than the wired battery, because the wired power supply does not use the battery, and the wireless is charging while discharging. Long-term use of radio charging will not affect the phone battery.
When the frequency is higher than a few megahertz, the coil uses high frequency ferrite as the core, and hollow coils can also be used. In this case, it is not appropriate to use multiple strands of insulated wire, but it is recommended to use a single strand of coarse silver coated wire winding. In the frequency range above 100MHzInside, it is not suitable to use ferrite core, wireless charging receiving coil can only choose hollow coil; A steel core can be used for fine tuning.
Wireless charging bank does not harm the mobile phone battery. Because the working frequency of wireless charging is now below 1M, it will not affect the signal of the mobile phone. On the contrary, wireless chargers not only reduce the use of data cables, but also make charging methods more free and safer. It is basically the same as wired charging, but the rate is lower, but the wireless charger still has a high energy conversion rate, which saves energy consumption more.
A11 is single wire single layer, single wire wound, A11a is double wire double layer, double wire wound. The sensory value is the same. Richtek RT3181C wireless transmitter solutions with integrated H-bridge power stages and current detection amplifiers optimized for LP-A11 coil solutions, external power stages can support high power output, support MP-A5/MP-A11 solutions, support programmable temperature protection and fan rotationSpeed control, this wireless terminal supports 15W wireless charging output. Chisel RT3181C Data information.
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 current is 0.6A-2A. The output power is 5W-10W, the efficiency is 70%-85%, and it is important to be compatible with WPC QI.
oppo a11x YesWireless charging is not allowed. The OPPO A11x is a mobile phone under the OPPO brand. OPPO (Guangdong OPPO Mobile Communication Co., LTD.) is a company providing smart phones, high-end audio and video equipment and mobile Internet products and services, established in 2004, headquartered in Dongguan City. In 2001, OPPO brand began global registration, and Chen Mingyong served as CEO.
iPhone11 as Apple's flagship iPhone11 also supports wireless charging, but relative to domestic mobile phones, the charging rate may be slower, but other aspects are still strongPotential, like the iPhone11 has a variety of different colors to choose from, but also the new addition of green and purple, very small and fresh.
ATK8910 is a Finock technology self-developed chip, 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.
3, the principle of wireless charging is mainly electromagnetic induction and wireless electromagnetic wave technology. The principle of electromagnetic induction is the basis of wireless charging. Electromagnetic induction occurs when a magnetic field is generated between a charger and a mobile device. The alternating current generated at the charger end will create eddy currents in the magnetic field, and the receiving coil at the mobile device end will sense this eddy currents. In this way, power is transferred from the charger to the mobile device.
4, the basic principle of wireless charging,That is, the current is converted into a magnetic field, and the magnetic field 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.