The next step: charging without being so tied to a pad. That's the technology a Watertown, Mass., company named WiTricity is developing. Based on work done at MIT, the technology -- on which the company holds exclusive patents -- uses magnetic resonance to move power through the air -- which means electricity can be moved farther distances without a wire. The way it works: Two devices resonate at the same frequency so that the magnetic waves can travel very precisely from one point to another. Plug a resonator into a wall outlet, and a device installed on a cellphone or an electric car receives the power and starts recharging. WiTricity says its system can move an impressive 3,300 watts -- enough to charge an electric car -- with little efficiency loss. Says Eric Giler, the CEO of WiTricity: "We all love electricity and are willing to do almost anything to get it. It will be the last thing to go wireless, but it will go wireless."
下一个目标:无需充电板也能无线充电。位于马萨诸塞沃特敦的WiTricity公司在这个领域颇有作为。这家公司利用电磁谐振技术在空气中传输电能,意味着电能有望实现远距离无线传输。这项技术的基础是麻省理工学院(MIT)的研究成果,WiTricity持有独家专利。它的具体原理如下:如果两个谐振物体具有相同的频率,那么电能将非常精确地从一方传输到另一方。只要把谐振器插入插座,在另一边的电动汽车或手机里安装上对应的设备,它们就能接收到电能,开始充电。WiTricity称目前已能传输高达3300瓦特电能而损耗极小,这已经足够给一辆电动汽车充电了。WiTricity首席执行官埃里克•吉尔说:“我们都热爱电能,愿意不惜一切代价获得它。电能也许是我们最后一个希望无线化的东西,而这个目标必将实现。”
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