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有望用于太空发电 日本研究超远距离无线输电技术

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2016-10-07 21:20:39 转载来源: 网络整理/侵权必删

北京时间10月7日消息,据外媒报道,日本研究人员在开发能远距离传输大量电能的无线输电系统。多种原型产品和项目有一个共同目标:从天空向地面输电

北京时间10月7日消息,据外媒报道,日本研究人员在开发能远距离传输大量电能的无线输电系统。多种原型产品和项目有一个共同目标:从天空向地面输电。

研究的最终目标是,在天空中建立不受地球天气影响的巨型太阳能电池阵列,把电能通过微波传输给地面接收装置。相比这一目标,目前的原型产品还有相当大差距,但其输电能力仍然远超当前的智能手机和其他设备的无线充电产品。

日本研究超远距离无线输电技术,有望用于太空发电

在本周的Ceatec展会上,J SpaceSystems展示了用来接收高能微波信号的天线。被称作“rectenna”的J SpaceSystems天线属于平板天线,接收的信号频率为5.8GHz。J SpaceSystems成功进行了在约50米距离上输电的试验,虽然电能损耗相当可观。它在一个1.2X 1.2米的天线上输入1.8千瓦电能,从一个2.6 X 2.3米的天线上获得340瓦电能。

三菱重工也在进行类似研究,去年在500米距离上成功进行了10千瓦输电试验,创下当时日本类似研究项目的新记录。三菱重工在试验中利用了巨型发射和接收天线。

随着无线输电技术的继续发展,它将有数个方面的用途。一种用途是在工厂中短距离输电,使企业能方便地重新配置机器、传感器和工作站,而无需重新布线。

另外一种潜在用途是,利用气球给因自然灾害造成电力中断的地区输电。此外,这一技术也可以为在空中飞行的无人机等类似物体提供电力。

但是,与在天空中建立巨型太阳能电池阵列、向地面输电的设想相比,上述用途只能算是小儿科。要实现这一目标,尚有许多工作要做,其中包括减少输电损耗。

日本航天机构承认,在太空中利用太阳能电池发电并非新创意。之前其他国家的类似项目因缺乏政府支持而被关停。

日本航天机构将推动研究人员继续进行研究工作,但同时意识到研究相关技术的难度,“克服建立空间太阳能电站的困难,需要时间和努力”。

标签: 有望 用于 太空 发电 日本 研究 远距离 无线 输电


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