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iPhone 12 magnetic wireless charger magnet structure revealed: NFC function is not affected As the iPhone 12 approaches, the supply chain revealed more and more details. This highly anticipated new machine not only joinsWith 5G technology, it is also equipped with 20W fast charging and magnetic wireless charging functions, which has attracted widespread attention from accessory manufacturers. The charging head network has exposed the internal structure of the magnetic wireless charger and NFC module suspected to be the iPhone 12. Bottom line: Apple's iPhone 8 will most likely be equipped with wireless charging technology with a maximum charging range of 5 meters, which has been confirmed again by supplier Lite-On Semiconductor. The 42-year-old maker of consumer electronics components joined the iPhone 8's supply chain to provide rectifiers for its wireless charging components.
Hengdian East Magnetic (002056) : Hengdian East Magnetic said on the interactive platform on September 6, 2017 that the company currently provides wireless charging disks to Apple. Anjie Technology (002635) : participated in the research and development of Apple wireless charging related products; The subsidiary Weisdongshan mainly produces soft magnetic materials against electromagnetic interference and other products, mainly used in wireless charging related products, and with strong technical research and development strength, it has entered the supply chain of major international customers.
High technical barriers and high profits in the integration design of the receiver chip and system (about 3 percent of the profits in the wireless charging industry chain)0%), the main customer is mobile terminals. The development status is very similar to that of fingerprint identification three years ago, only IDT has shipping experience, Broadcom is an official custom for Apple, while others, including TI and Qualcomm, failed to seize the first wave of industry outbreak opportunities in the content, and failed to break into any mobile phone manufacturer's supply chain.
In her speech, she discussed in depth the development of the Qi2 standard under the theme of "WPC Standard Update". Founded in 2008, the WPC Wireless Charging Alliance is an open, collaborative standards development organization. The alliance has more than 300 corporate members, coveringThe entire supply chain is the maker of the global Qi standard and the first wireless kitchen power supply standard Ki.
Is true,Now most of the new mobile phones launched on the market have this function, that is, you can charge the phone indefinitely, some mobile phones even have the function of wireless reverse charging, that is, you turn on this function on the mobile phone, this mobile phone can also charge other mobile phones wireless charging technology although it has appeared in the 19th century, but the popularity of mobile phone applications is not high.
Mobile phone wireless charging technology based on the principle of magnetic coupling, through the magnetic field to achieve power transmission. Wireless charger contains magnetic core, induction coil and circuit board, mobile phone built-in wireless charging coil and circuit board. When placing the phone on the wireless charger, the magnetic core is producedGenerate magnetic field and realize electric energy transmission. The advantages of wireless charging are significant. First of all, easy to use, no need to plug and unplug the charging cable. Secondly, the charging efficiency is high, comparable to or even faster than wired charging.
Now there are also third-party wireless charging modules on the market, these modules have built-in receiving coils and circuits, and wireless chargers can also be made through wireless charging modules. Some modules are general-purpose, while others are only available on specific models. For users with a smartphone's non-removable battery design, the external module receiver method can be adopted.
First, there needs to be a clear answer to the question: online circulationA wide range of induction hobs to charge mobile phones, indeed someone really did succeed!! However, the process is not by placing the mobile phone that supports wireless charging directly on the induction stove, but by making a self-made coil to generate electromagnetic induction, and after a series of depressurizing, the voltage is reduced to 2V DC voltage and then the mobile phone is charged. In fact, wireless charging is not a very complex technology, just add a pair of coils used to transmit and receive current inside the smart phone to form a small magnetic field, so as long as you understand its principle, you can manually increase your own smart phone by very cheap means.
2, foreign bodies usually refer to magnetic metals, that is, magnetic substances. When such substances are in a change of magnetic field, according to the eddy current effect, an electric current is formed inside the metal, causing it to heat up. This means that when there is a magnetic substance on the wireless charging board, it may lead to a loss of energy, which poses a potential threat to the receiver and transmitter of wireless charging.
3, look for QI standard: wireless charging currently has two major international mainstream industry standards. One is the QI standard of the Wireless Charging Alliance (WPC), and the other is the AirFuelAlliance. thisThe two standards stipulate the energy, technical parameters, compatibility, and safety of wireless charging products, and have strict certification standards.
4, Qi wireless charging refers to the application of Qi wireless charging standard in the way of electromagnetic induction for mobile phones, cameras and other handheld low-power equipment wireless charging technology. Qi Wireless charging standard by the Wireless charging Alliance (Wireless Power Consortium, referred to as WPC) initiated and developed, is currently the world's widely recognized wireless charging standard.
Low efficiency: energy storage and transmission efficiency is less than real contact. Slow charging speed: Due to low efficiency, the charging speed is slow at the same input power. Although wireless charging can be unplugged, the distance between the phone and the charger is very small. However, the electromagnetic energy loss is still not small, and the power received by the general mobile phone is about 75% of the power sent by the charger.
Although the technical content of the equipment is high, the economic cost of the equipment is higher and the maintenance cost is large. Because of the realization of long-distance high-power wireless magnetoelectric conversion, the energy consumption of the equipment is high. With wireless chargingThe greater the distance and power of the equipment, the greater the loss of idle work.
Disadvantages: Although the equipment has high technical content, the economic cost of the equipment is higher and the maintenance cost is large; Because of the realization of long-distance high-power wireless magnetoelectric conversion, the energy consumption of the equipment is high. As the distance and power of wireless charging devices increase, the loss of idle work will be greater.The charge efficiency is not high. Once the distance is a little far away, the efficiency of charging will be dramatically reduced, and a lot of time and resources need to be wasted to complete the charging, so the use is not meaningful. Safety issues in the charging process. high-powerWireless charging equipment will produce a large amount of electromagnetic radiation, which will cause certain adverse effects on health, but also have interference effects on aircraft and communications. The first practical aspect.
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