无线充电设备翻译.doc

Wireless charging technology overview and outlook One, the history of wireless charging technology actually idea of wireless power supply have emerged as early as one hundred years ago, in 1890, nikola tesla, the founder of the modern alternating current (ac) system began to idea of wireless power supply method, and finally put forward a very ambitious plan - the earth as the inner conductor; Between the earth and the ionosphere established about 8 hz low frequency resonance, recycled around the earths surface electromagnetic wave to transmit power at a distance. At the time, tesla is a series of experiments are carried out using coil, created the wireless power transmission. In 1990, and tesla began his research, and try to make electricity like broadcast across oceans, afterwards because of huge investment, the technology of death. Although tesla research ultimately no results, but his original wireless power technology idea is bold enough. Second, the development of wireless charging technology tesla coil at the time didnt get, but in the mid - 1920 - s, Japanese H.Y agi and S.U da theoretically confirmed this solution is a completely different from special power supply way of cable transmission, the wireless power supply technology, photoelectric coupling, electromagnetic coupling main magnetic resonance, etc. Three different ways. A power supply, the current wireless power supply technology, photoelectric coupling, electromagnetic coupling main magnetic resonance, etc. Three different ways. 1, electromagnetic coupling, electromagnetic coupling for power engineers, in the familiar, the transformer is to use this principle to transfer energy. If separate two winding transformer, is something of a wireless power supply. Rechargeable electric toothbrush is a typical case, but the use of electromagnetic coupling way has a lot of disadvantages, not high magnetic permeability of magnetic core as a medium, the lines of magnetic force can lead to serious spread into the