1, wireless charging loss rate refers to the proportion of power lost in the process of transmission from the charger to the receiver. It marks wirelessEfficiency and superiority of charging technology. Because wireless charging requires electromagnetic wave transmission in the air, it will cause certain losses. For wireless charging technology, reducing the loss rate is very key, which can effectively improve charging efficiency and safety.
2, the electromagnetic energy loss of wireless charging is still not small, the power received by the general mobile phone is about 75% of the power sent by the charger.
3, Abstract: Wireless charging is a new technology, compared with the traditional data cable charging method, wireless charging can not be transmitted through the cable to charge the mobile phone, with safe and harmless, low power loss rate,Features such as convenience.
4, low efficiency: energy storage and delivery efficiency is less than real contact. Slow charging speed: Due to low efficiency, the charging speed is slow at the same input power. Although wireless charging can be unplugged, the distance between the phone and the charger is very small. However, the electromagnetic energy loss is still not small, and the power received by the general mobile phone is about 75% of the power sent by the charger.
5, secondly, when using wireless chargers, if the device is not correctly aligned with the charging pad or the charging distance is too far, it may lead to reduced charging efficiency, and frequent interruptions during the charging process will also cause the batteryAn extra burden. Frequent charging interruptions may cause the battery to constantly re-enter the charging state, which will accelerate battery depletion in the long run. In addition, the quality of wireless chargers on the market varies.
The technology refers to the efficiency in a wireless charging system that can be converted from a power source to electrical energy and transmitted to the target device. The efficiency is mainly determined by the energy loss in the energy transmission process. Usually, the conversion efficiency of wireless charging systems is between 60% and 80%, which means that there will be 20% to 40% of the energy transmission processEnergy loss. Considering the different environment, equipment and technology, the conversion efficiency of wireless charging systems will also be different.
Low efficiency magnetic resonance wireless charging technology conversion efficiency is generally only about 70%, compared with wired charging efficiency is low. Magnetic resonance wireless charging technology requires the establishment of a magnetic field between the transmitting end and the receiving end for energy transmission, but the formation and maintenance of the magnetic field requires a lot of electric energy, and a certain amount of electromagnetic radiation will be generated during the transmission process.
Qi standard wireless charger conversion rate is 75%~85%, compared with the traditional chargerThe time is about 1/5 longer, but the wireless charger is usually charged in the fragment of time, and there is no need to specifically draw out the charging time, so the time saves time.
Direct charge that can charge fast, but also can play at the same time, wireless charging time is long and slow, and wireless charging can be done at night when the mobile phone is not used. However, the conversion efficiency is best at about 80%, and the remaining electrical energy can only be converted into heat, so the heat of wireless charging has been a big problem. High-power wireless chargers also need to be paired with active cooling fans. In fact, there is no distinction between good and bad mobile phones, and what really affects mobile phones is the mobile phone charging itself.
Component loss affects the internal resistance of wireless charging fast and slow components, and the conversion efficiency of the system is high. The selection of components such as triode with small internal resistance can greatly improve the efficiency of wireless charging. However, with low internal resistance, the cost will be relatively high.
1, battery loss: Relative to wired charging, because the heat generated during wireless charging will be relatively high, wireless charging actually has a slightly greater loss to the battery. The distance is too small, just the transition technology: becauseBecause the magnetic field decays quickly in the air, the distance of the wireless charging technology of the mobile phone is generally very small, and the effective charging distance is generally only 3-8 mm.
2, first of all, the wireless charger generates current through the electromagnetic field to charge the device, and the charging method may be slightly less efficient than the wired charging. This means that some heat may be generated during the charging process. If exposed to a high temperature environment for a long time, the life of the battery may be affected, because high temperature is a big factor in battery performance degradation and aging.
3, in summary, wireless charging will not be correct under normal useBattery life has a significant impact. As long as the user can pay attention to choosing the right charging equipment, maintain good habits, and regularly carry out battery maintenance, it can ensure that wireless charging brings convenience at the same time, but also ensure the long-term use of the battery.
4, wireless charging itself will not cause damage to the battery, but the charging temperature is too high or too low and the charger material and other factors will have an impact, so it is recommended to use a regular genuine charger, and to avoid a long time of fast charging. Wireless charging is a short-range wireless charging technology, which converts electromagnetic energy into electrical energy and turns it straight, compared with traditional wired chargingWhat are the advantages and disadvantages of charging? '> What are the advantages and disadvantages of wireless charging for mobile phones?
1, advantages: the use of wireless magnetic induction charging equipment can be invisible, the equipment wear rate is low, the application range is wide, the public charging area is relatively reduced; High technical content, easy to operate, can implement relatively long distance radio energy conversion. Disadvantages: Although the equipment has high technical content, the economic cost of the equipment is higher and the maintenance cost is large; Because of the realization of long-distance high-power wireless magnetoelectric conversion, the energy consumption of the equipment is high.
2, advantages: non-contact, no wire, movableMove. Disadvantages: short distance, small power, poor efficiency. Low efficiency: energy storage and transmission efficiency is less than real contact. Slow charging speed: Due to low efficiency, the charging speed is slow at the same input power.
3, advantages: The advantage of wireless charger is that we can charge the phone at the same time, no longer need to unplug the data cable. In addition, it can be taken at any time, which is more convenient than charging with a data cable. At the same time, it can provide certain support for the phone, making the phone charge more stable. Disadvantages: One disadvantage of wireless chargers is that the charging speed is relatively slow, and most wireless chargers only support 5W or 5W chargingPower.
4, the advantages and disadvantages of this charging method are: Advantages: reduce the loss, can reduce the use of data lines, to avoid a lot of loss and waste of data lines, relatively speaking, is a relatively environmentally friendly charging method. High adaptation rate, even if the use is not the same charging line, but as long as they support wireless charging, they can be charged on the same wireless charging board.
There will be attenuation of wireless charging voltage. This is because wireless charging is only a transitional technology because the magnetic field decays in the airSoon, the distance of wireless charging technology of today's mobile phones is generally very small, and the effective charging distance is generally only 3-8 mm. Taking into account the thickness of the mobile phone protective cover, mobile phone charging is basically close to the charger in order to effectively carry out wireless charging. This limitation doomed this wireless charging technology is only a transitional state.
Low efficiency: energy storage and transmission efficiency is not as good as real contact. Slow charging speed: Due to low efficiency, the charging speed is slow at the same input power. Although wireless charging can be unplugged, the distance between the phone and the charger is very small. But the electromagnetic energy lost is stillIt is not small, the power received by the general mobile phone is about 75% of the power sent by the charger. It is well known that the attenuation of mobile phone batteries is gradually increased according to the number of charging cycles, research shows that the number of wireless charging battery cycles is much greater than wired charging, about 5 times faster than wired charging, which will lead to wireless charging mobile phone batteries decay faster, shorter service life.
Reduce loss When using wireless charging, you only need to connect the wireless charging board to the power supply, and then place the device that supports wireless charging on the wireless charging board. Wireless charging still dependsAlthough it is necessary to connect the power supply, it can reduce the use of data lines and avoid a large amount of loss and waste of data lines, which is relatively an environmentally friendly charging method.
The owner has abandoned the traditional data cable. Charging also makes the car seem more high-end. If there is no wireless charging on the car, but you want to use it, then you can install this function on the car, generally need to go to the 4S shop or regular auto repair shop for installation, the price is about 1000 to 2000, mainly according to the model to determine the price.
Interface durability is better: because wireless charging does not require frequent pluggingCharging cable, so the phone's data interface wear will be greatly reduced. At the same time, the coil of wireless charging is not exposed to the air, which can also reduce the oxidation corrosion of the charging unit. Disadvantages: Although wireless charging has many advantages, there are also some disadvantages in actual use.
In the next few years, the development of wireless power technology is gradually moving towards commercial application, showing great potential. A team of researchers at the Massachusetts Institute of Technology recently succeeded in making this breakthrough. They use two copper coils, two meters apart, to get through the radioThe force transfer technology lights up a 60-watt light bulb, an experiment that demonstrates the feasibility of wireless power transmission. In summary, the power broadband market has broad prospects in China, but it also faces many challenges such as technology, policy and market promotion. With the maturity of technology, policy support and further expansion of the market, power broadband is expected to play a greater role in the Chinese market, providing users with more efficient and convenient network services.
The future development of power communication shows a broad application prospect. Traditional power line carrier communication (PLC) is moving towards high capacity,The direction of high-speed change, gradually from high-voltage transmission lines to low-voltage distribution networks, to support a variety of household users, such as telephone, Internet access, etc. For example, the Homeplug Powerline Alliance in the United States and the experimental research in China indicate that PLC technology is widely used in the field of home network and intelligent management.
Superconducting power: superconducting transmission, superconducting energy storage, superconducting current limiting, superconducting motor, etc. The current superconducting technology is actually more suitable for application in DC, AC loss exists when AC, and now the proportion of direct current in power transmission and electricity is increasing.This is related to the increase in electricity consumption of computers and big data centers. Therefore, we are optimistic about the prospect of superconducting technology in DC power transmission.
Good prospects. Industrial field: Electromagnetic field and wireless technology are widely used in communication, manufacturing, power, transportation and other fields, such as wireless sensor networks, intelligent manufacturing, smart grid and so on. Therefore, graduates majoring in electromagnetic field and wireless technology can find job opportunities in these fields, such as communications engineers, circuit designers, wireless network engineers, power engineers, automation engineers, etc.