The concept of wireless charging has caused a hot discussion in the technology circle, and Xiaomi is as a leader to do the ultimate in this technology, although it is wireless charging, butIn fact, the charger itself still needs an external power supply, and the wireless connection between the charger and the device can meet the current diversified equipment charging needs, greatly reducing our charging trouble.
Place the phone on the wireless charger, making sure that the contact between the phone and the wireless charger is good. At this time, the phone screen will display "charging" prompt, indicating that wireless charging has been enabled. It should be noted that the power supply of the wireless charger needs to be plugged into the power socket, otherwise it cannot be charged. At the same time, the distance between the wireless charger and the mobile phone can not be too far, and it is generally recommended that the distance does not exceed 5mm. Above isMillet wireless charging open method.
Hello unplugged should not work. If you don't plug in the charger, there is no power, how to charge the phone.
Wireless charging coil test good or bad method is 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 coil temperature rise, the lower the temperature rise, the better the performance. Test the efficiency of the coil, the higher the efficiency, the better the performance.
Secondary windingBroken, the wireless charging coil has two windings, one is the main winding, one is the secondary winding, after the secondary winding is damaged, it will cause the main winding to heat, and the output has no voltage.
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. The E4980A/AL has a wide impedance range from 4 milliohm to 100 milliohm, and can cover this band with 10% accuracy, making it particularly suitable for the precise evaluation of wireless charging coils.
The size of the current and the thickness of the coilIt matters. It matters how often. Look at the specific circuit, sometimes when the difference in inductance value is not large, the impact on the output voltage and current is not obvious, but it may lead to a large difference in the change in unit period voltage/current, and also lead to the difference in loss and efficiency, so the choice of inductor is reasonable at this time, mainly to see whether it can get better performance under the premise of meeting the size specifications.
Wireless charging coil test coil capacitance to the ground because the capacitor is the electric field energy and magnetic field energy conversion material, in the process of wireless charging, electric field energy and magnetic field energy need to be converted. The process of wireless charging isWhat harm or change will be caused by the addition of coils? '> Please ask the gods, what harm or change will the wireless charging base increase coil?
Wireless charging base to increase the coil, or do not modify it, you increase the coil not only did not play a good effect but affect the speed of charging, increase the coil is equal to increase the resistance, it will make the current slow, the coil is proportionally wound, too much or too little can not, coil wound less, there will be damage to the parts, resulting in parts burned spark, For some do not arbitrarily modify the wireless charging base.
Wireless charging will not accelerate battery aging, not against the bodyThe body has radiation. 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 induction voltage, and generates induction current to charge the mobile phone after loading. So don't worry.
Can not, excessive increase in 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, fiveAnything within a meter.
Mobile phone charging base generates high-frequency alternating magnetic field, when the mobile phone is placed on the charging base, the alternating magnetic field will generate high-frequency alternating voltage inside the mobile phone through the induction coil, and then through the rectifier circuit in the mobile phone to convert the high-frequency alternating voltage into direct current to charge the mobile phone.
Mobile phone space charging technology is to install the transmitter coil on the wireless charging base, and install the receiver coil on the back of the mobile phone. When the mobile phone is charged near the charging base, the transmitter coil will generate alternating magnetic field due to the access of alternating current. The change in the magnetic field will induce an induced current in the receiving coil, which willThe energy is transferred from the transmitting end to the receiving end, and the charging process is finally completed.
1, the central position on the back of the phone. According to the relevant public information, the position of the wireless charging coil of millet 11Ultra is under the Logo of millet, in the central position on the back of the phone, the specific position can see the Xiaomi Logo on the back of the phone, the wireless charging coil is in the position below it. When you use the wireless charging board on the Mi 11UltraFor wireless charging, simply align the wireless charging coil on the back of the phone with the charging pad to charge.
2, the wireless charging coil is in the back plane, the transparent back cover, you can see the coil position. Xiaomi has 19 built-in coils, each of which supports 20W wireless charging, and can choose the right coil according to the placement of the product. The Mi 11 wireless charging position is in the middle of the back cover of the phone. The device with wireless charging function conforming to the Qi standard is placed in the center of the wireless charger, and the charging will automatically start.
3, in the center of the back of the phone, the specific location can beLook at the Xiaomi Logo on the back of the phone, and the wireless charging coil is located below it. When you use a wireless charging board to wirelessly charge the Mi 11Ultra, simply align the wireless charging coil on the back of the phone with the charging board to charge it. Mi 11ultra Wireless Charging coil location Mi 11ultra Wireless Charging coil Location In the phone Settings page, we click on the battery and performance column.
4, the wireless charging coil is in the back plane, the transparent back cover, you can see the coil position. Xiaomi has 19 built-in coils, each of which supports 20W wirelessCharge, and the appropriate coil can be selected according to the placement of the product. Therefore, whether it is placed vertically, horizontally or diagonally, the millet multi-coil wireless fast charging board can almost achieve pairing and charging.
Notes for winding coils mainly include the selection of coils with different frequency characteristics, the selection of magnetic cores of different materials, and the consideration of parameters such as inductance and distributed capacitance of the coil. In the wireless charging receiving coil, according to its toneFor the working characteristics of the frequency band, silicon steel sheet or permalloy is usually selected as the core material.
Finally, after confirming, put the phone on the wireless charger, the charging prompt will be displayed, and it is OK. Precautions for wireless charging: Do not place metal objects, magnetic stickers, magnetic cards and other foreign objects between the mobile phone and the wireless charger (such as the car magnetic bracket iron attached to the back of the mobile phone). The mobile phone may not be charged properly or be damaged due to overheating. Place the mobile phone correctly. If the wireless charging coil deviates too much, the charging efficiency may be low or it cannot be charged.
First of all, according to the needs of the circuit, select the winding method:First determine the size of the inside diameter. Then according to the inductance value and resistance and other factors to determine the coil layer number, 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.