5312-Jirat-Integrated-Project

Wireless Power Transfer is quite a futuristic technology. Instead of transferring power through wires, wireless power transfer uses magnetic fields to charge electronic components without requiring any physical connection. Wireless power transfer systems can power transports through the road allowing electric vehicles to travel over long distances. Although the technology is still in its infancy companies are willing to experiment and make it commercially viable. This technology can reduce carbon footprints substantially by making electric transportation practical.

In general a wireless power system consists of a "transmitter" device connected to a source of power such as a mains power line, which converts the power to a time-varying electromagnetic field, and one or more "receiver" devices which receive the power and convert it back to DC or AC electric current which is used by an electrical load. At the transmitter the input power is converted to an oscillating electromagnetic field by some type of "antenna" device. The word "antenna" is used loosely here; it may be a coil of wire which generates a magnetic field, a metal plate which generates an electric field, an antenna which radiates radio waves, or a laser which generates light. A similar antenna or coupling device at the receiver converts the oscillating fields to an electric current. An important parameter that determines the type of waves is the frequency, which determines the wavelength.

Wireless power uses the same fields and waves as wireless communication devices like radio, another familiar technology that involves electrical energy transmitted without wires by electromagnetic fields, used in cellphones, radio and television broadcasting, and WiFi.