.85 euros. According to the query of X technology, the internal resistance of wireless charging coil is 0.85 euros. Wireless charging technology comes from radio energy transmission technology, which can be divided into two ways: low-power wireless charging and high-power wireless charging. Low-power wireless charging often uses electromagnetic induction.
Wide impedance range, to adapt to a variety of needs The inductance of the wireless charging coil is usually at the micro hen level, and the test frequency is in the kHz range, which requires a wide and accurate measurement range. E4980A/ALThe wide impedance range from 4 milliohm to 100 milliohm covers this band with an accuracy of 10%, making it particularly suitable for the precise evaluation of wireless charging coils.
Then according to the inductance value and resistance and other factors to determine the number of layers of the coil, 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.
Mobile phone wireless charger is probably the diameter of the mobile phone end coil about 50mm, the diameter of the charger end is about 46 to 48mm, due to different mobile phone models may vary, but the best transmission sideThe coil size of the phone end and the charging end is the same.
to 48mm. The minimum size of wireless charging receiving coil is 46 to 48mm, different mobile phone models will be different, wireless charging receiving coil is to accept the current emitted by the wireless charging transmitting coil, when the transmitting coil emits the current, the receiving coil receives the emitted current to the current storage end.
In the ravg range of 0~0.08 m, the output power withThe increase of coil turns first increases and then decreases; In the range of ravg 0.08~ 0.4m, the output power decreases first and then increases and then decreases with the increase of coil turns. For a fixed operating frequency, the quality factor Q mainly depends on the shape and size of the coil and the material used. Standard coil technologies (such as wire winding coils and PCB coils) generally specify quality factor values.
The number of coil turns is proportional to the voltage. In wireless charging, the number of turns in the coil is proportional to the voltage, and the more turns in the coil, the greater the induced electromotive force, and the higher the voltage generated. Number of turns and electricityThe relation of voltage current is described by Ohm's law and Faraday's law. Coil turns is one of the important parameters of electromagnetic coil, which is closely related to voltage, current, inductance and other parameters.
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.
is the greater the inductance. The larger the wire diameter, the smaller the resistance. These are all designed to power up on their ownThe high frequency electric field in the capacitor formed between the overcharging seat and the electrical appliance to be charged, that is, the induction electric field generated by coupling two sets of asymmetric dipoles in the vertical direction to transmit power, this charging method has the advantages of low cost and low alignment requirements. But there are not many actual products.
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 mobile phone wireless charger is probably about 50mm in diameter of the mobile phone end coil, and the charger end is about 46 to 48mm in diameter, depending on the mobile phone modelThere may be differences, but the best transmission method is that the phone and the charging end of the coil size is the same.
to 48mm. The minimum size of wireless charging receiving coil is 46 to 48mm, different mobile phone models will be different, wireless charging receiving coil is to accept the current emitted by the wireless charging transmitting coil, when the transmitting coil emits the current, the receiving coil receives the emitted current to the current storage end.
Coil diameter about 100 mm, wire diameter about 0.5 mm.
by MarinSolj, professor of physics at the Massachusetts Institute of TechnologyThe research team led by acic used the technology to light a 60-watt light bulb two meters away and named it WiTricity. The diameter of the coil used in the experiment reached 50cm, which is not yet commercialized, and if the size of the coil is reduced, the receiving power will naturally decrease. Disadvantages of wireless charging: Although the technical content of the equipment is not high, the economic cost of the equipment is high and the maintenance cost is large.
Wireless charging technology still needs continuous development, at present, the wireless charger is not practical, and itself is not convenient, so it needs continuous development and technical improvement.
to 48mm. The minimum size of wireless charging receiving coil is 46 to 48mm, different mobile phone models will be different, wireless charging receiving coil is to accept the current emitted by the wireless charging transmitting coil, when the transmitting coil emits the current, the receiving coil receives the emitted current to the current storage end.
The mobile phone wireless charger is probably about 50mm in diameter of the mobile phone end coil, and the charger end is about 46 to 48mm in diameter, depending on the mobile phone modelThere may be differences, but the best transmission method is that the phone and the charging end of the coil size is the same.
Fuhengtai FHT19M0428W05 Wireless charging receiving module comes with receiving coil, receiving coil can be customized. The module size is only 15mm*15mm*1mm, the space ratio is small, and the combination with the customer's wired charging bin is simple, just connect the positive and negative terminals of the module's 5V output to the input terminal of the wired charging port.
Wireless charging of transmit and receive coil distance of about 8mm. The QI standard is not just the distance between the two, but the wireless charging of the twoWhen the frequency and communication protocol standards. This distance is a maximum distance, beyond which the efficiency of wireless reception is very low. So it doesn't have to be 8mm.
The diameter of the coil used in the experiment reached 50cm, and it can not be commercialized, if you want to reduce the size of the coil, the receiving power will naturally decrease. Compared with electromagnetic induction, based on magnetic resonance, wireless charging achieves long transmission distance, efficient power supply, and is a one-to-many power supply method. However, because both sides need to be at the same resonant frequency at the same time, so the circuit frequency modulation is important, but this is not soEasy.
2, Huawei new reveal: beyond Apple's smart charging board, only 799 yuan starting at Huawei's new product launch in July, although Huawei P50 series and MatePad Pro 16 and other products stole the show, but a mysterious new product has not been ignored. This product is Huawei multi-device intelligent wireless charging board, it has been officially listed, the price is only 799 yuan.
3. Huawei Super Fast Charge wireless charger (MAX 27W) : Move the center of the earphone case coil (to the lower part of the earphone)Close to the back of the LED light, not in the geometric center) Align with the center of the wireless charger coil, and the indicator light is charged.
4. Up to now (September 2023), Huawei mobile phones have launched products that support wireless charging. Wireless charging is a technology that can be charged without physical connection between the phone and the cable, and can provide a more convenient and flexible charging method. The wireless charging technology used by Huawei mobile phones is mainly based on the Qi (Qi) standard. The standard is an industry standard that is widely used for interoperability between wireless charging devices.
5, Conclusion: This 3-in-1 wireless charging board is undoubtedly the ideal choice for the desktop, it with its excellent practicality and aesthetics, the charging function and convenient life perfect integration. The smart design of this wireless charging board not only has the dual charging ability of mobile phones and watches, but also looks elegant, like a delicate decoration that easily integrates into the layout of the desk.