question 2: what is wireless charging? How to charge? Wireless charging technology；; Wireless charge technology) originated from wireless power transmission technology. Wireless charging, also known as inductive charging and non-contact inductive charging, uses near-field induction, that is, inductive coupling, and the power supply equipment (charger) transmits energy to the power-using device, which uses the received energy to charge the battery and at the same time provides it with its own operation. Because the energy is transferred between the charger and the electric device by inductive coupling, there is no wire connection between them, so both the charger and the electric device can be exposed without conductive contacts.
Chinese name: Wireless charging technology
mbth: wireless charging technology
Alias: inductive charging
Sharing
Historical development
In 189, physicist and electrical engineer Nikolai? NikolaTesla has already done wireless transmission experiments and realized AC power generation. The international system of units of magnetic induction intensity is also named after him. Tesla's idea of wireless power transmission is to use the earth as the inner conductor and the earth's ionosphere as the outer conductor, establish a low-frequency vibration of about 8Hz between the earth and the ionosphere by amplifying the transmitter in the radial electromagnetic wave oscillation mode, and then use the surface electromagnetic waves around the earth to transmit energy. However, due to lack of financial resources, Tesla's bold idea has not been realized. Although the feasibility of this scheme has been completely proved by later generations in theory, the world has not yet achieved great harmony, and it is impossible to broadcast energy and obtain it for free in the world. Therefore, a great scientific idea was stillborn.
The research team of Massachusetts Institute of Technology published their research results on the website of American Science magazine on June 7, 27. The research team applied * * vibration to the transmission of electromagnetic waves and successfully "caught" the electromagnetic waves. They use copper coils as electromagnetic vibrators. One coil is attached to the power transmitter and the other is on the power receiver. When the transmitter sends an electromagnetic wave with a certain frequency, it spreads to the receiver through the electromagnetic field, and the power is transmitted wirelessly. This technology, which they call "wireless power", has been successfully used to power a 6-watt light bulb two meters away after many tests. The farthest transmission distance of this technology can only reach 2.7 meters, but researchers believe that the power supply can already charge the battery within this range. And only need to install a power supply, you can supply power to the electrical appliances in the whole house.
In February 214, computer manufacturer Dell joined A4WP camp. At that time, the relevant senior officials of the camp said that they would upgrade their technology and support ultrabooks of computer manufacturers such as Dell for wireless charging. Most of the traditional notebook computers on the market have a power supply of more than 5 watts, but Ultrabook, which uses Intel's low-power processor, will be the first notebook computers to use wireless charging.
Until now, wireless charging technology has only been related to "small" mobile devices such as smart phones and small-sized tablets. However, A4WP ("wireless power consortium"), one of the three camps of wireless charging, recently announced that its technical standard has been upgraded, and the charging power it supports has increased to 5 watts, which means that high-power devices such as notebook computers and tablets can also realize wireless charging.
principle
electromagnetic induction charging
alternating current with a certain frequency in the primary coil generates a certain current in the secondary coil through electromagnetic induction, thus transferring energy from the transmission end to the receiving end. At present, the most common charging solution is electromagnetic induction. In fact, there is not much mystery in the technical realization of the electromagnetic induction solution. As early as December 25, BYD, a local company in China, applied for the patent of non-contact induction charger, using electromagnetic induction technology.
magnetic field * * * vibration charging
consists of an energy transmitter and an energy receiver. When two
wireless charging devices are tuned to the same frequency, or vibrate at a specific frequency, they can exchange each other's energy. It is a technology currently being studied by Marin Soljacic, a physics professor at MIT. The diameter of the coil used in this experiment reaches 5cm, and it can't be commercialized. If the coil size is reduced, the receiving power will naturally decrease
Radio wave charging
This is a mature technology, which is similar to the ore harvesting used in the early days ... >; >
question 3: what does wireless charging mean? At present, it is simply a chicken rib, and it will only be charged if it is placed there, and it will only increase the thickness of the mobile phone. < P > Question 4: What does wireless charging mean? Simply put, it is a process in which electricity turns to magnetism and magnetism turns to electricity. Specific related knowledge Baidu bar.
question 5: what does a wifi socket mean? Charging by wireless or something, seeking science. WiFi smart plug is a creative product, which makes use of the existing WiFi network in the home, so that your smart phone or tablet computer can turn on or off the specified electrical appliances through the App operation under networking conditions. Moreover, because smart plug can completely cut off the power of electrical appliances, the electrical appliances with high standby power, such as televisions and electric water heaters, can be turned on as needed after being controlled by smart plug, and considerable electricity bills can be saved every month.
Features:
1. WiFi smart plug has broken through the image of a complex system in smart home. With a smart phone and an independent APP, you can remotely control your home appliances anywhere in the world.
2. WiFi smart plug has no complicated installation process, and it is plug and play. The socket supports the mainstream operating system of Android/ios. By downloading the application, local and remote free control can be realized.
3. WiFi smart plug supports real-time status feedback, which can feed back the working status of electrical appliances to the client in real time and support the setting of multiple scheduled tasks. The mobile phone client can control multiple smart plug.
Question 6: What does wireless charging of iphone7 mean? A wireless charger refers to a charger that is not connected to the terminal equipment that needs charging by the traditional charging power cord. A variety of devices can use a charging base station, and wired charging of mobile phones, MP3 players, power tools and other power adapters will not exist. By using the magnetic field generated between coils to transmit electric energy magically, inductive coupling technology will become a bridge connecting charging base stations and equipment.
At present, most chargers, such as iPod and iPhone, charge the built-in battery of the device through direct contact of metal wires. The advantage of wireless charging technology lies in its convenience and versatility. Disadvantages are low efficiency and can only provide electricity.
question 7: what is wireless charging? Wireless charging is to send an alternating electric field through the coil, and the coil on the back of the equipment is used as receiving electric energy, which is stored in the battery of the equipment as charging. The earliest application is not the mobile phone but the electric toothbrush, because the electric toothbrush is often in contact with water and needs to be charged, which coincides with the advantages of wireless charging.
Question 8: What do you mean that wireless charging has been suspended? The cable is broken.
You should see that the offline line has been deformed.
Just buy a new data.
Question 9: What is wireless charging? Wireless charging means sending an alternating electric field through a coil. The coil on the back of the device is used as receiving electric energy and stored in the battery of the device as charging. The earliest application is not the mobile phone but the electric toothbrush, because the electric toothbrush is often in contact with water and needs to be charged, which coincides with the advantages of wireless charging.
question 1: what does wireless charging of mobile phone mean? Using the distance of nuclear magnetic resonance vibration, charging can be realized within a certain distance without data cable. I have also thought about this, but I have a theory earlier.