Wireless power transmission is wireless power transmission and contactless power transmission. The transmitter converts electrical energy into other forms of relay energy (such as electromagnetic energy, laser, microwave and mechanical wave), and after a certain distance, the relay energy is converted into electrical energy through the receiver to realize wireless power transmission.
According to the different forms of relay energy in energy transmission, wireless power transmission can be divided into magnetic (field) coupling, electric (field) coupling, electromagnetic radiation (such as solar radiation) and mechanical wave coupling (ultrasonic wave).
1890, Tesla made a wireless power transmission test. The wireless power transmission mode conceived by Tesla takes the earth as the inner conductor and the ionosphere of the earth as the outer conductor. The transmitter is amplified by radial electromagnetic wave oscillation, and low-frequency vibration of 8Hz is established between the earth and the ionosphere, and energy is transmitted by surface electromagnetic waves around the earth. In the end, due to lack of financial resources, Tesla's bold idea failed to come true.
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Main applications of wireless power transmission system;
1. Through the interconnection of massive energy nodes, the depth and breadth of smart grid information perception will be improved in an all-round way, helping to build the world's first ubiquitous power Internet of Things demonstration zone.
2. Innovate the cooperation mode of "Power Infrastructure * * * *", use the power tower to hang the operator's antenna, and the first full-sector dual-platform shared base station of the State Grid system was completed in July 20 18, and the tower company used the power single-tube tower to hang the base station, shortening the opening time from two months to ten days.
3. After the power wireless private network is put into operation, it can provide effective management means and technical support for power grid construction and operation, comprehensively enhance the depth and breadth of smart grid information perception, and promote Nanjing to become the world's first intelligent interconnected energy Internet demonstration city.
Baidu Encyclopedia-Wireless Power Transmission