Nikola Tesla wanted to create the way to supply power without stringing wires. He almost accomplished his goal when his experiment led him to creation of the Tesla coil. It was the first system that could wirelessly transmit electricity. From 1891 to 1898 he experimented with the transmission of electrical energy using a radio frequency resonant transformer of the Tesla coil, which produces high voltage, high frequency alternating currents. With that he was able to transfer power over short distances without connecting wires. However, the Tesla coil does not have much practical application anymore, Tesla’s invention completely transformed the way electricity was comprehended and used. Radios and televisions still use variations of the Tesla coil today.
In 1901 Tesla began his work of a large high-voltage wireless energy transmission station called the Wardenclyffe Tower. Small-scale wireless power transfer as a prototype transmitter for a “World Wireless System” that was to broadcast both information and power worldwide was demonstrated to investors, nut they had pulled out and the facility was never completed. Although Tesla stated his ideas were proven, he had a history of failing to confirm his ideas by experiment, but it seems like he had no evidence that he ever transmitted meaningful power beyond the short-range demonstrations above. In the 110 years since his experiments, efforts using similar equipment have failed to achieve long distance power transmission. The scientists agreed that his World Wireless system would not have worked.
Here is the video that explains the Concept of Wireless Power Transfer:
The transfer of power to a device without wires. Although the wireless transfer of electromagnetic energy in the form of audio, video and data signals is general, the wireless transfer of electrical power is relatively new. Some devices already employ wireless energy transfer without the use of metal contacts. The power is transferred through the plastic cases using magnetic induction. By using magnetic fields, at some point in the future, electric vehicles are expected to be refueled within three feet of the charging station.
“Wireless energy transfer” Encyclopedia of terms. PC Magazine Ziff-Davis. 2014. Retrieved December 15, 2014.
“Wireless Electricity? How the Tesla Coil Works.” Live Science. N.p., n.d. Web. 17 Feb. 2016
“Wireless Energy Transfer.” PC. N.p., n.d. Web. 17 Feb. 2016.