1, 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.
2, wireless charging coil shape and transmission distance introduction: wireless charging of the transmitting and receiving 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.
3, the mobile phone wireless charger is probably about 50mm in diameter of the mobile phone end coil, the charger end is about 46 to 48mm in diameter, because of different mobile phone models may vary, but the best transmission method is the mobile phone end and the charging end coil size is the same.
4, the coil diameter is about 100 mm, the wire diameter is about 0.5 mm.
5, in ravg is 0~0.0In the range of 8 m, the output power increases first and then decreases with the increase of coil turns. 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.
6,.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. Small-power wireless charging is often usedElectromagnetic induction type.
The principle of wireless charging: electromagnetic induction. The charging base and the mobile phone terminal have built-in coils, and when the two are close, the coil is based on a certain frequencyAlternating current generates a certain current in the receiving coil of the mobile phone through electromagnetic induction, thereby transferring the point energy from the originating end to the receiving end, and then starting to power the mobile phone from the charging seat. Magnetic resonance.
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, through the use of the magnetic field generated between the coils, the magic transmission of electrical energy, inductive coupling technology will become a bridge connecting the charging base station and equipment.
Electromagnetic induction: The fundamental principle is to use electromagnetic senseIn principle, similar to a transformer, 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. 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.
Wireless charging, also known as inductive charging or non-contact inductive charging, based on the principle of electromagnetic induction, it is not necessary to transmit electricity to the device like the traditional wired charger, but the device that needs to be charged can be charged by contacting the wireless charging base.
is the principle of wireless charging technology of electric generation and magnetic generationUsing magnetic fields generated between coils to magically transmit electrical energy, inductive coupling technology will become a bridge connecting charging base stations and devices.
3, for wireless charging of Apple mobile phone, you first need to buy an Apple wireless charger; The iPhone11 itself has a wireless charging function, which does not need to be manually opened, only need to connect the wireless charger plug and power; Point the iPhone11 back down at the wireless charger; Charge your phone by placing it on a wireless charger; To make the best charging effect, choose the location as the best center.
4, the parallel resonance formed by the capacitor is measuredThe loop's air-core coupling coil has a line diameter of O.5 mm, a diameter of 7 cm, an inductance of 47 uH, and a carrier frequency of 2 MHz. According to the parallel resonance formula, the matching capacitance C is about 140 pF. Therefore. The transmitter uses a 2MHz active crystal oscillator to generate a power carrier frequency close to the resonant frequency.
5, in the case of a certain effective value of the current, the pole heating is normal 2, inductance saturation, this heating is also very common.3, there is a large oscillation voltage at both ends of the inductance. The magnetic core is larger, which can reduce the number of turns and shorten the length of the line. Positive shock change, low ripple current, magnetic lossSmall, mainly resistance thermal check filter capacitor, and capacitor failure will cause the inductor overheating and discoloration.