wireless charging

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The wireless communication system is common in our daily life. We use our cell phones every day, but there are so many cables around us. Some people want a world without any wires and now ,their dream has come true. A new technology called wireless charging has been invented and becomes more and more widely used. However, although it is becoming more and more popular, there are still some problems behind it. There are many reasons why wireless charging should not be used now: it has some limitations, it is not efficient and it has some bad influences. Wireless Charging which can be called inductive charging uses electromagnetic fields to transfer energy between two unconnected objects. It was invented by scientists from MIT. They transferred 60 watts with ~40% efficiency over two meters, which was able to light up a bulb(Kurs 83). From that time, this technology has entered a stage of rapid development. A lot of companies joined in researching this new technology, like Intel, Nokia and Apple. Recently, people are crazy about having a world without cables, but there are some potential risks behind it. Wireless charging technology is not well developed now. It still has some limitations. For starters, it is not mobile. In other words, you have to put it on a charging panel. For example, I have a electric toothbrush which uses wireless charging. When I need to charge it, I have to put it on its base and I can not move it during charging. Therefore, the reason of using wireless charging in toothbrush might be a hook that can make more people interested in and buy this toothbrush. Another limitation of wireless charging is that most of our old equipment can not use this technology. If you want to use wireless charging,... ... middle of paper ... ...ies which are selling the equipment do not tell customers the potential risks. Works Cited Baarman, Dave and Joshua Schwannecke “Understanding Wireless Power.” Ecoupled.com. Ecoupled. Dec. 2009. Web. 5 Apr. 2014. Kurs, Andre., et al. “Wireless Power Transfer via Strongly Coupled Magnetic Resonances.” Science 317 (2007): 83-85. Print. Lin, James C. "Wireless Power Transfer for Mobile Applications, and Health Effects." IEEE Antennas and Propagation Magazine. 55.2 (2013): 250-253. Print. Schneider, David “Wireless power at a distance is still far away.” IEEE.org. IEEE. 30 Apr. 2009. Web. 5 Apr. 2014 “Wireless Car Charging Costs energy.” ECT.coop. The National Rural Electric Cooperative Association. 7, Jan. 2014. Web. 14 Apr. 2014. Zhang,Guoreng. “Wireless Charging evaluating: Nokia 920.” Sohu.com. Sohu. Web. 10 Apr. 2014.

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