There is radiation is certain wireless charge measurement , otherwise the energy can not be transmitted across the air. The radio waves used for charging must be larger than the radiation power of the phone itself Wireless charging measurement , otherwise the charging efficiency is too low. Calculated with a 1000mAh capacity lithium battery Wireless charging measurement , 50% of the charging amount is about 7~8Wh.
There must be, should belong to the range of electromagnetic radiation, a long time in the electromagnetic radiation has an impact on the human body, the radiation intensity also depends on the emission power and radiation range to determine.
The harm is relatively small can be ignored, although wireless charging technology has appeared in the 19th century, but the popularity of mobile phone applications is not high. It uses the "magnetic resonance" principle of the "strong" wireless charge measurement, which allows the wireless charger to transmit an electric charge to the phone battery through the air. The cityMany wireless chargers on the surface do not indicate radiation values, and electromagnetic radiation standards for wireless chargers have not yet been introduced. He Guili, director of the Tel Laboratory of the Telecommunication Research Institute of the Ministry of Industry and Information Technology, said that the wireless charger has radiation is inevitable, but since it has been listed, it means that it must meet international standards and will not cause harm to the human body. "As long as the wireless charger is done according to the technical specifications, it will not have a radiation hazard to the human body." He Guili said. This shows that the Internet rumors are not true.
Wireless charging will not accelerate battery aging, will not have radiation to the body. The principle of wireless charging is electromagneticInduction. 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.
To effectively reduce the adverse effects of electromagnetic radiation on health. Mobile phone wireless charging measurement : under normal circumstances, it will not harm the mobile phone, wireless charging is now working frequency is less than 1M, so it will not affect the signal of the mobile phone. Wireless charging for cell phone batteriesLife is also not affected, and wired charging is basically the same, but the rate is lower, but the wireless charger conversion rate is still very high, more energy saving.
1, suggestion: reduce the charging current, is the voltage normal; Put the receiving coil closer to the transmitting coil; Re-match the circuit of the transceiver coil, it is best to test whether the two ends are the same frequency; Consider redesigning the coil.
1. Connect the measuring instrument to the output end of the wireless charging receiver to ensure a stable connection. Open the measuring instrument and select the voltage measurement function to read and record the output voltage value of the wireless charging receiver.
2, wireless charging by the coil receiving end and transmission end with a multimeter measurement. Because wireless charging requires a sending and receiving end, wireless charging mobile power supply is installed on the basis of conventional mobile power supply with a sending device, and the charging mobile phone supports wireless charging, a receiving coil with wireless charging. There is a difference between the sending and receiving coils.
3, you are normal no-load voltage and low load voltage. The no-load voltage is normal, indicating that your wireless charging transceiver circuit is normal, but the voltage is pulled down after the load, the most likely is that your coil matching is not good, resulting in insufficient power received by the output end, so the charging voltage will be pulled down.
1, minutesThe amount of charge in the wireless charging measurement reaches or exceeds the wireless charging measurement by 10%, and the charging efficiency is even higher than the direct use of the wireless charger. In contrast, the Deep Blue SL0 Long comfortable Da and Wei brand Blue Mountain DHT-PHEV are obviously not too friendly for Apple iPhone 13 Pro, with a 15-minute charge of 3%, which is a large gap compared with other test models.
2, Millet and Huawei's maximum charging efficiency require the mobile phone to support their own protocols, so we test separately Wireless charging measurement The situation of Huawei Mate 30 with Huawei wireless charging mobile phone stand and Xiaomi 10 with Xiaomi wireless charging mobile phone stand. The standard test uses the iPhone 11 pro with all wireless charging phone stands, and the rule is to keep the phone lit, and test the time required to charge 10% (from 40% to 50% of the phone charge) on all products under test.
3. In performance tests, the Lauco USB-C 12-in-1 hub performed stably, whether it was quickly inserted into the device or notLine charging, no problem. Even when connected to multiple devices at the same time, such as monitors, external storage devices, ipads, iphones, MacBook chargers, it can stay calm and not overheat. This hub is undoubtedly the ideal choice for travel storage, replacing the traditional hub location.
4, the configuration of the two models of the leading PHEV is quite rich, and the high-equipped models we tested can be described as luxurious. Inductive trunk, mobile phone wireless charging level is relatively rare configuration. In fact, it is already available on lower-end models within 100,000 of Beijing HyundaiIt shows that your wireless charging transceiver circuit is normal, but the voltage is pulled down after the load, the most likely is that your coil matching is not good, resulting in insufficient power received by the output end, so the charging voltage will be pulled down.
Wireless charging technology is the use of electromagnetic induction principle, in the sending and receiving end with the corresponding coil to send and receive the induced current to charge.
What are the components of wireless charging? The left side is TX, that is, the transmitter, and the corresponding product is the wireless charging transmitter. The right side is Rx, that is, the receiving end, and the corresponding product is with wireless charging functionCell phones, etc. TX end: MCU, power full bridge, and LC resonant Tank composed of inductors and capacitors, where the inductor is the transmitting end coil.
There seems to be a problem, the backfilling problem. However, the output end of the wireless charging receiving module is generally through bridge rectification, and the reverse charge is not charged, but the working frequency of the wireless charging transmitting module is higher, and the received charging power signal will still be short-circuited by the high frequency of the charging head. The solution is to add a high-frequency diode to the output of the wireless charging receiving module for isolation.
Wireless charger refers to the use of electricityThe principle of magnetic wave induction charging device, the principle is similar to the transformer. There is a coil in the sending end and the receiving end. The sending end coil is connected to the wired power supply to generate an electromagnetic signal, and the receiving end coil senses the electromagnetic signal of the sending end to generate a current to charge the battery.
Radio wave This is a more mature technology, similar to the early use of ore radios, mainly composed of microwave transmitters and microwave receivers, can capture the radio wave energy bounced from the wall, while adjusting with the load while maintaining a stable DC voltage. This method requires only a transmitter mounted on the wall plug toAnd a "mosquito" receiver that can be installed in any low-voltage product.
The first: use Apple 29W USB PD fast charger charging, this method can help iPhone X to reach enough power in a short time. The second: use Apple 5V/4A charger to charge, this method is the most cost-effective way to charge. The third: use Apple standard 5W charger to charge, this way charging power is low, handThe machine has little heat but takes a long time to charge.
Of course, wireless charge is good, I also use the iPhone X, I am equipped with Nanfu wireless charge, this charge is customized for iPhone X, fast charging, and automatic power off after full charge, prevent overcharge, protect the battery, extend the battery life. Charging is also safe without burning. The most important thing is that wireless charging will not damage the charging interface of the mobile phone, and it is convenient to charge.
It is recommended that wired charging is relatively slow, and in fact, it should be placed on the charging seat, and it is not very convenient.
When using wireless charging, iPhThe oneX body temperature is high, if the long-term use of wireless charging will have an irreversible impact on the battery life of the iPhoneX. With wired charging, the body temperature of the iPhoneX does not change much, and the battery life is not affected. Therefore, it is still recommended to use wired charging to charge the mobile phone, otherwise the battery life reduction needs to be replaced is a small expense.
iPhoneX wireless charging is useful, but the wireless charger is to be purchased separately, Apple's original price is relatively high, but it is easy to cause the phone to heat up when charging, in cold areas, wireless charging effect will be comparedOk, but in the hot summer, it may cause the temperature of the phone to be too high, and long-term use may cause the battery life of the phone to be shortened. And wireless charging while playing will be very inconvenient.