實現無線(xian)充電的技(ji)術(shu)原理有(you)四種類型(xing)，電磁(ci)感應(ying)式無線(xian)充電、電磁(ci)諧振式無線(xian)充電、電磁(ci)輻射(she)式無線(xian)充電、電場耦(ou)合式無線(xian)充電，電磁(ci)感應(ying)式是目(mu)前最常用的無線(xian)電能(neng)傳輸方式。

電磁感應式

電磁感應式無線充電原理是通過線圈耦合進行能量傳遞，在發送端與接收端分別設置一個線圈，發送端連接高頻交變電流，從而產生電磁信號，接收端通過線圈將接收到的電磁信號轉變成電流，電流經過整流、穩壓等電路處理后給設備提供電能。電磁感應原理進行充電的設備，類似于變壓器，在發送和接收兩端各有一個線圈，發送端線圈連接有線電源產生電磁信號，接收端線圈感應發送端的電磁信號從而產生電流給用電設備。電流流過線圈會產生磁場。其他未通電的線圈靠近磁場就會產生電流。無線充電就應用了這種物理現象進行充電。電磁感應式無線充電主要應用于手機等小型設備的充電中，具備轉化效率高，充電設備小的優點。（櫻花視頻:電磁感應式手機無線充電方案）

電磁感應式無線充電

電磁諧振式

電磁諧(xie)振(zhen)式(shi)無(wu)線(xian)(xian)(xian)充(chong)電利用的(de)(de)(de)(de)(de)是(shi)波共(gong)振(zhen)的(de)(de)(de)(de)(de)原(yuan)理。排列(lie)在一個磁場(chang)中的(de)(de)(de)(de)(de)有相同振(zhen)動(dong)(dong)頻(pin)(pin)率(lv)的(de)(de)(de)(de)(de)線(xian)(xian)(xian)圈(quan)，由(you)于其振(zhen)動(dong)(dong)頻(pin)(pin)率(lv)特(te)性相同也可以實現能(neng)量從一個線(xian)(xian)(xian)圈(quan)向另(ling)一個線(xian)(xian)(xian)圈(quan)的(de)(de)(de)(de)(de)電能(neng)傳(chuan)輸。電磁諧(xie)振(zhen)無(wu)線(xian)(xian)(xian)充(chong)電裝(zhuang)置(zhi)(zhi)主要(yao)有能(neng)量發送盒接收裝(zhuang)置(zhi)(zhi)組(zu)成(cheng)，講發送盒接收裝(zhuang)置(zhi)(zhi)調(diao)成(cheng)相同的(de)(de)(de)(de)(de)特(te)定頻(pin)(pin)率(lv)，二者形成(cheng)共(gong)振(zhen)，從而(er)實現能(neng)量傳(chuan)遞(di)，電磁諧(xie)振(zhen)式(shi)無(wu)線(xian)(xian)(xian)充(chong)電可以實現大功率(lv)充(chong)電需求，能(neng)進行相對較遠的(de)(de)(de)(de)(de)無(wu)線(xian)(xian)(xian)充(chong)電。

電磁共振式無線充電原理

電磁輻射式

電(dian)(dian)磁(ci)輻射式(shi)無線(xian)(xian)充(chong)(chong)電(dian)(dian)技術原理是(shi)利用(yong)電(dian)(dian)磁(ci)波傳遞能(neng)量的特點，將電(dian)(dian)磁(ci)波接收(shou)并(bing)轉(zhuan)化(hua)為(wei)電(dian)(dian)能(neng)給(gei)設(she)備充(chong)(chong)電(dian)(dian)的方(fang)式(shi)，由(you)微波發(fa)(fa)射裝(zhuang)置和(he)(he)微波接收(shou)裝(zhuang)置組(zu)成，微波發(fa)(fa)射裝(zhuang)置中有一個微波發(fa)(fa)射源(yuan)，微波源(yuan)內裝(zhuang)有磁(ci)控管，發(fa)(fa)射天線(xian)(xian)將電(dian)(dian)能(neng)以(yi)(yi)電(dian)(dian)磁(ci)波的形(xing)式(shi)傳遞到接收(shou)天線(xian)(xian)，通過(guo)接收(shou)設(she)備進行收(shou)集(ji)和(he)(he)轉(zhuan)化(hua)為(wei)設(she)備充(chong)(chong)電(dian)(dian)。電(dian)(dian)磁(ci)輻射式(shi)充(chong)(chong)電(dian)(dian)可以(yi)(yi)實現更遠距(ju)離的無線(xian)(xian)充(chong)(chong)電(dian)(dian)，充(chong)(chong)電(dian)(dian)設(she)備也可以(yi)(yi)不受特定(ding)位置限制。

電磁輻射式無線充電原理圖

電場耦合式

電(dian)(dian)(dian)場耦(ou)合式(shi)無線充(chong)電(dian)(dian)(dian)技(ji)術原(yuan)理是通(tong)過產(chan)(chan)生的感(gan)應電(dian)(dian)(dian)場實現電(dian)(dian)(dian)能(neng)從發(fa)送(song)端(duan)向(xiang)接收端(duan)轉(zhuan)移，垂直(zhi)方向(xiang)兩組非對(dui)稱偶極子通(tong)過耦(ou)合作用能(neng)夠產(chan)(chan)生感(gan)應電(dian)(dian)(dian)場，感(gan)應電(dian)(dian)(dian)場能(neng)夠將(jiang)電(dian)(dian)(dian)能(neng)從發(fa)送(song)端(duan)轉(zhuan)移到接收端(duan)，充(chong)電(dian)(dian)(dian)效率高，損耗(hao)小(xiao)，發(fa)熱量低(di)，不受特(te)定位置限制。

電場耦合式無線充電原理

幾種無線充電方式的比較