Lack of resources. Huawei wireless charger chip shortageGoods are scarce and therefore expensive. Huawei Super Fast charging vertical wireless charger (Max50W). Huawei: Huawei Technologies Co., Ltd. is an employee-owned private technology company headquartered in Shenzhen, Guangdong Province, China, which manufactures and sells telecommunications equipment.
Reference Samsung genuine wireless charger, top 1000, high 500, standard 200 close to 300. Although the technical content is not particularly high, it is not recommended to buy a miscellaneous brand, or a regular brand is better. If you don't like Samsung, there are micro goose in China, only about 300, charging distance and area are better than SamsungStrong, is a domestic pride, the world's leading level.
This capacitor trifrequency is more balanced, high quality. Non-polar capacitors have no polarity requirements and can operate at relatively high frequencies. Three frequency is more balanced, high quality, so more expensive. Capacitance, also known as capacitance, refers to the amount of free charge stored at a given potential difference, denoted C, in SI units of farads (F).
Why is Huawei wireless charger official website more expensive? The answer is as follows: Because the quality of the official website is guaranteed, it is guaranteed to be genuine, and it is bought in other places.
Veryexpensive. Wireless charging mobile phones are very expensive, it needs a special wireless charging module, the cost will increase, so it is much more expensive. Wireless charging technology (Wireless charging technology; Wireless charge technology is derived from radio energy transmission technology, which can be divided into two ways: low-power wireless charging and high-power wireless charging.
First NiguLord La Tesla, he's not a coil. The second coil is called the magnetic storm coil, also known as the "Tesla coil". The "equivalent capacitance to the ground" in the final coil is the equivalent capacitance formed between the discharge end and the ground after the ground ground of the secondary coil.
The inductor L1 and the capacitor C1 have a resonant frequency of 1MHz, and because the circuit is resonant, the no-load current is small when the receiving coil is not near the transmitting coil. The receiving end also adopts the mode of resonance, which can maximize the transmission efficiency of energy, and the direct current is obtained by the filtered capacitor after the Schottky diode is rectified, which directly charges the battery and charges the currentAbove 0.6A. If the coil is made into a barrel shape, the transmission efficiency will be higher.
When the wire is charged, there is an electric field between the wire and the earth, and the wire will discharge to the earth through the atmosphere (the other two-phase wire is also removed to the ground), and the discharge current of the wire from beginning to end is "reduced" to a point, and this "imaginary" current is the relative capacitance current of the ground.
Wireless charging coil test is good or bad as follows: test the resistance value of the coil, resistance value within a certain range is a good product. Test the Q value of the coil, the higher the Q value, the better the performance. Test the temperature rise of the coil. The lower the temperature rise, the better the performanceYes. Test the efficiency of the coil, the higher the efficiency, the better the performance.
Electromagnetic induction wireless charging, when the current of the power supply through the coil (wireless charger's power supply coil) will generate a magnetic field, other unenergized coil (mobile phone side of the electric coil) close to the magnetic field will generate current, charging the mobile phone. The advantages of wireless charging safety: no power contact design, can avoid the danger of electric shock.
The basic principle of wireless charging is to convert the current into a magnetic field, which is transmitted through the airThen it is converted into current and 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 charging system mainly adopts 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, by using the magnetic field generated between the coils, the magical transmission of electrical energy, inductive coupling technology willThe overall appearance design of the youth version of the charging treasure has not changed much, and the color has been increased to black and white, which is more young and fashionable. The material of the youth version of the shell has been changed from metal to plastic, and the function has been slightly reduced, so the price has been reduced by 20 pieces.
For you who pursue individuality and safety, the youth version of Xiaomi wireless charging treasure is undoubtedly a better choice. Not only the use of pure cobalt battery to reduce the power error, but also provide a variety of color options to meet your different needs. The standard version of Xiaomi wireless charging treasure only has black, while the youth version has two choices of black and white, classic and fashionable. Lightweight plastic material standard versionIt is made of metal, while the youth version is made of lightweight plastic, which makes it more portable.
Color is different, Xiaomi wireless charging treasure standard edition only black, although the black charging treasure looks more dirty, but this version of the charging treasure color is too single, there is not too much choice. However, the youth version of Xiaomi wireless charging treasure has black and white, which are still more classic colors. The shell material is different, the standard version of Xiaomi wireless charging treasure is metal, and the youth version of Xiaomi wireless charging treasure is plastic. The weight is different.
Xiaomi wireless charging treasure youth version but it is a pity that there is only oneA jack, but the price of 129 yuan, very cost-effective! If you do not need wireless charging, then millet mobile power 3, is also a good choice, the metal shell feel, and the price is also worth choosing.
Therefore, the magnetic field generated by the transmitting end coil will pass through the receiving end coil, and the receiving coil will generate an electric field, such asIf a load is attached to the end of the receiving coil, an electric current will be generated. Magnetic resonance wireless charging technology - is a special case of magnetic induction technology, it is similar to the resonance of our voice, when the oscillation frequency of the system and the natural frequency of the system at the same time will occur resonance, resonance, the energy intensity of the system reaches the maximum point.
What is wireless charging? What is the principle of wireless charging? 1 No visual wire charging, using electromagnetic wave charging. 2 Magnetic resonance is used to transfer charge in the air between the charger and the device for charging.
Disadvantages of wireless charging efficiency is slightly lower: generalThere is also a transformer in the charger, but the wireless charging transformer composed of the transmitting coil and the receiving coil is limited in structure, and the energy transmission efficiency is theoretically slightly lower than that of the general charger. Slow charging speed: Due to the current mobile phone and other receiving devices, most limit the input power, so the charging speed is slow.
Electromagnetic induction: A certain frequency of alternating current in the primary coil generates a certain current in the secondary coil through electromagnetic induction, thereby transferring energy from the transmission end to the receiving end. It is the first generation of mobile phone wireless charging, the technology is mature, but only single to single short distance charging (qi standard, within 1cm, 5 watts toInside), and can not be similar to WiFi single-to-multiple charging.
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. Electromagnetic induction wireless charging, when the current of the power supply through the coil (wireless charger's power supply coil) will generate a magnetic field, other unenergized coil (mobile phone side of the electric coil) close to the magnetic field will generate current, charging the mobile phone.
Wireless charging 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 cordThe new wireless charging technology, by using the magnetic field generated between the coils, magically transmits electricity, inductive coupling technology will become a bridge connecting charging base stations and devices. How to use: Connect the USB cable and plug it into the socket.