Does no harm to mobile phones. Wireless charger uses the latest wireless charging technology, by using the alternating magnetic field generated between the coils, the transmission of electrical energy, inductive coupling technology will become a bridge connecting the charging base station and equipment.
Wireless charger does not harm the phone. The wireless charger uses electromagnetic induction technology, which transmits energy by using a magnetic field generated between coils, coupling the current from the charging disc to the mobile phone battery, for the battery, its charging process is no different from that of an ordinary wired charger.
Wireless charging is usually not harmful to cell phone batteriesUh-oh. Wireless charging converts electrical energy into special energy through electromagnetic induction and transfers it between magnetic fields to achieve charging of mobile phone batteries. This charging method does not require the use of data cables, making charging more convenient and safe. Under normal circumstances, wireless charging operates at a frequency below 1MHz and will not affect the phone's communication signal.
No, wireless charging does not degrade the battery's performance any faster. Battery manufacturers design the amount of energy stored in batteries to determine the amount of electricity we can use. The manufacturer sets a fixed upper cut-off voltage and a lower cut-off voltage, and in between the two voltage rangesUsing wireless charging or charging at high power will also aggravate the heat of the phone. Finally, the use environment is also a factor that cannot be ignored.
2, the root cause of the high power wireless charging problem is that the high power wireless charging on the market now relies on high current for charging, but this situation is tantamount to increasing the resistance, thereby increasing its temperature, so it is necessary to use high heat absorption and high heat dissipation materials as the outer packaging, in addition, it is necessary to reduce the resistance accordingly. This will fundamentally reduce the fever.
3, it is recommended that you use the standard charger to charge the use of otherAlthough third-party chargers can also charge mobile phones, they may cause problems such as heating due to differences in charging specifications or charging protocols.
4, the general use of metal heat dissipation can reduce the heat transfer to the mobile phone, thus affecting the mobile phone charging power, is bound to increase the metal block on the circuit board or coil, somewhat similar to the notebook CPU plus copper tube heat dissipation. Or increase the active fan heat dissipation, and use the fan to cool the motherboard and coil, which can achieve the delay power reduction time.
1, the principle of wireless charging Wireless charging oscillation frequency : electromagnetic induction. The charging base and the mobile phone terminal respectively have built-in coils wireless charging oscillation frequency . When the two are close, the generating coil generates a certain current in the mobile phone receiving coil based on a certain frequency of alternating current through electromagnetic induction, thereby transferring the point energy from the originating end to the receiving end, and then begins to supply power from the charging seat to the mobile phone. Magnetic resonance.
2. RadioThe wave principle is to convert environmental electromagnetic waves into current and transmit current through a circuit. The transmission distance of this wireless charging method is greater than 10 meters, which is suitable for long-distance low-power charging, and can also realize automatic charging anytime and anywhere. However, because of the low conversion efficiency, if you use this method, the charging time will be longer.
3, the principle of wireless charging is mainly electromagnetic induction and wireless electromagnetic wave technology. The principle of electromagnetic induction is the basis of wireless charging. Electromagnetic induction occurs when a magnetic field is generated between a charger and a mobile device. The AC generated by the charger end willA vortex is formed in the magnetic field, and the receiving coil on the mobile device senses this vortex. In this way, power is transferred from the charger to the mobile device.
4, if the use is vivo mobile phone, wireless charging is also known as inductive charging or non-contact inductive charging, based on the principle of electromagnetic induction, the device that needs to be charged can be charged by contacting the wireless charger after being energized.
5, generally about 0.9-2 meters high-power wireless charging transmission distance up to 5 meters wireless charging technology can be divided into low-power wireless charging and high-power wireless charging two ways. Low power wireless chargingThe electromagnetic induction type is used, such as the Qi method of charging mobile phones, but ZTE's electric vehicle wireless charging method uses the induction type.
6, wireless charging methods include electromagnetic induction, magnetic resonance, electric field coupling and radio wave transmission, 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.
1. In this circuit, the resonant frequency of inductor L1 and capacitor C1 is set to 1MHz. Because the circuit is in a resonant state, the no-load current is very small even if the receiving coil is not near the transmitting coil. At the receiving end, the resonance principle is also used to improve the efficiency of energy transmission. Schottky diode is used to rectify the signal, after filtering capacitor processing, to obtain direct current, and then charge the battery. In the best working condition, the charging current can reach more than 0.6A.
2, the resonant frequency of inductor L1 and capacitor C1 is 1MHz, because the circuit is resonant, so when the receiving coil is not near the transmitting coil, the no-load current is very small. 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, and the charging current is above 0.6A. If the coil is made into a barrel shape, the transmission efficiency will be higher.
3, wireless charging coil A6 three 3 coil - inductance 15uH. Inductance basic formula and inductance definition formula: L=μ×Ae*N2/l. Where: L represents the inductance, μ represents the magnetic permeability of the magnetic core, Ae represents the cross-sectional area of the magnetic core, N represents the number of turns of the coil, and lm indicates the magnetic circuit length of the magnetic core. Empirical formula: L= (k*μ0*μs*N2*S) /l. Among them. μ0 is the vacuum permeability =4π*10 (-7).
4, through the two inductors, the energy can be coupled to the transmission, the secondary coil received by the alternating current through the receiving conversion circuit, it is converted into direct current, directly for the battery charging. In addition to electromagnetic induction, capacitive coupling mode is also a common wireless charging method. In this modeNo inductor is required, but the electric field of the capacitor is used for energy exchange to achieve wireless charging.
-205 KHZ. watch Wireless charging parameters Wireless charging oscillation frequency Wireless charging oscillation frequency Wireless charging oscillation frequency Wireless charging oscillation frequency Output power: 5 volt -1 amp, chargingCurrent: 1000 MA, input power: 2 watts, transmission distance: 5-8 milli material, efficiency conversion: 75%.
Supports wireless charging, Apple Watch uses sapphire screen, two screen sizes. Support phone, voice back text message, car connection, weather, flight information, map navigation, play music, heartbeat measurement, step counting and other dozens of functions, is a health and sports tracking device. The Apple Watch uses the wireless charge oscillator frequency is a MagSafe-style wireless charger. It will be magnetically attractedIt attaches to the back of the Apple Watch and then uses inductive charging.
Wireless charging is supported. The Apple Watch features a sapphire screen with two screen sizes. It supports dozens of functions such as phone call, voice response text message, car connection, weather, flight information, map navigation, music playback, heartbeat measurement, step counting, etc. It is a health and exercise tracking device. Apple Watch uses the wireless charge oscillation frequency MagSafe-style wireless charger. It will magnetically attach to the back of the Apple Watch and charge inductive.
Huawei wireless charger can be used for wireless charging of Apple Watch. You only need to connect the power supply and put the device on the charger to contact the charging interface. Look at Huawei's wireless charger does not support the QI protocol, if it is supported, it can be charged, but it will be slower, it should be able to 5W. The iPhone 12 supports the QI wireless charging protocol, as well as the unique magsafe protocol.