1, the working principle of the wireless charger: the principle of electromagnetic induction, energy coupling through the coil to achieve energy transfer. 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, electromagnetic induction. The charging base and the mobile phone terminal have built-in coils, and when the two are close, the coil is generated based on a certain frequency of alternating current through electromagnetic induction in the mobile phone receiving coilA certain current is generated, which transfers the point energy from the originating end to the receiving end, and begins to power the phone from the charging seat. Magnetic resonance.
4, electromagnetic induction: The fundamental principle is to use the principle of electromagnetic induction, similar to a transformer, the primary coil of a certain frequency of alternating current, through electromagnetic induction in the secondary coil to produce a certain current, thereby transferring the energy from the transmission end to the receiving end. The conversion efficiency is high, the cost is cheap, but the transmission distance is short, and it is easy to be affected by the placement.
1, Apple wireless charging concept stock leader is total Da Electro-acoustic; Anjie Technology; Lishun precision; Goer Shares; Crystal photoelectric; Dongshan precision; Ultrasonic electronics and other high-tech companies.
2, what are the leading shares of wireless charging Cloud Road shares (688190) 2022 mid-term report: Net profit of 90 million yuan, net profit growth rate of 428%, operating income of 3.9 billion yuan. Toni Electronics (603595) reported in 2022: Net profit of 63 million yuan, net profit growth rate of 376%, operating income of 3.8 billion yuan. Jing Quan Hua (002885) (002885) China News in 2022: Net profit of 55 million yuan, net profit growth rate of 1180.62%, operating income of 11.1 billion yuan.
3. Annual report of Yunlu Stock (688190) : Net profit of 90 million yuan, net profit growth rate of 428%, operating income of 3.9 billion yuan. Toni Electronics (603595) annual report: Net profit of 63 million yuan, net profit growth rate of 376%, operating income of 3.8 billion yuan. Jingquanhua (002885) (002885) annual report: Net profit of 55 million yuan, net profit growth rate of 1180.62%, operating income 11.1 billion yuan.
1. The steps are as follows: First cut the end of the USB data cable connected to the mobile phone with scissors or a knife, and then cut a short section of the long end of the data cable into the incision, you will see four green, red, white and black wires, cut the green and black two, and cut a small section of insulation layer in the red and green two respectively to reveal the copper wire.
1, Millet mobile phone core suppliers include Lens Technology, BOE, Oufei light, Xinwang Da, Shunluo Electronics. Lens Technology production of wireless charging coil : Lens Technology is the main supplier of Xiaomi mobile phone glass cover plate Production of wireless charging coil for Xiaomi mobile phone front and rear cover and other key components; Lens Technology has deep cooperation with Xiaomi in the fields of technological innovation, R&D reserves and scale production production of wireless charging coils Core products and production services have been widely used in Xiaomi's various high-end smartphone terminal products.
2, Xiaomi suppliers include many enterprises production of wireless charging coils , mainly the following aspects of suppliers: parts and components suppliers. Xiaomi's phones and other smart products require a large number of parts and components, such as processors, memory chips, displays and so on. As a result, Xiaomi's suppliers include well-known chip and display suppliers such as Qualcomm and Samsung. In addition, there are suppliers of batteries, camera modules, connectors and other passive componentsThe circle not only does not have a good effect but affects the speed of charging, increasing the coil is equal to increasing the resistance, it will make the current slow, the coil is proportionately wound, too much or too little can not, the coil is wound less, there will be damage to the parts, resulting in parts burned spark, because do not be free to modify the wireless charging base.
Wireless charging will not accelerate battery aging, will not have radiation to the body. The principle of wireless charging is electromagnetic induction. The charging dock is like an iron core with some primary coils wrapped around it. Cell phones have secondary coils built into them. The primary coil is energized to generate electromagnetic induction, so that the secondary coil generates inductionVoltage, with the load to generate inductive current to charge the phone. So don't worry.
Can not, too much increase the voltage or increase the number of turns will burn the battery, because the more you turn the higher the voltage, I do not know whether your self-made charger is Qi program, if it is Qi, it is not possible, this must be close contact, you have to change to radio wave type, within five meters.
In summary, KeyThe sight E4980A/AL Precision LCR meter, with its high accuracy, wide impedance range, fast measurement and multiple fixture selection, is the ideal choice for coil testing of wireless charging systems to ensure high performance and reliability of the system.
The resistance value of the inductor under test is zero, and there is a short-circuit fault in it. The size of the DC resistance value of the inductor under test is directly related to the enamelled wire diameter and the number of coils wound. As long as the resistance value can be measured, it can be considered that the inductor under test is normal. Note: If you need to determine accurate inductance and resistance values, please use a specialThe inductance measuring instruments used are: impedance tester, LCR tester, digital bridge, etc.