近年來電源濾波器隨著現代科技水平迅速提高，可是你了解電源濾波器的構成電源電路的基本原理嗎？和小編一起來了解了解吧：
根據電(dian)(dian)源(yuan)端口的電(dian)(dian)磁騷擾(rao)特點，電(dian)(dian)源(yuan)EMI噪聲濾(lv)波器(qi)是一(yi)種無源(yuan)低通濾(lv)波器(qi)，它無衰減(jian)地(di)將交流電(dian)(dian)傳輸(shu)到電(dian)(dian)源(yuan)，而(er)大大衰減(jian)隨交流電(dian)(dian)傳入(ru)的EMI噪聲，同時又能有效(xiao)地(di)抑制電(dian)(dian)源(yuan)設備產生的EMI噪聲，阻(zu)止它們(men)進入(ru)交流電(dian)(dian)網干擾(rao)其它電(dian)(dian)子(zi)設備。
L1為(wei)共模電(dian)(dian)(dian)感(gan)(gan)，它的上下(xia)左右為(wei)兩只共模電(dian)(dian)(dian)感(gan)(gan)電(dian)(dian)(dian)磁線圈(quan)，這2個(ge)電(dian)(dian)(dian)磁線圈(quan)繞在相同(tong)變壓器鐵芯上，線圈(quan)匝數和位(wei)(wei)置(zhi)都同(tong)樣(繞制(zhi)反(fan)方向)。那(nei)樣，當電(dian)(dian)(dian)源(yuan)電(dian)(dian)(dian)路中的一(yi)切正(zheng)常(chang)(chang)電(dian)(dian)(dian)流量流過共模電(dian)(dian)(dian)感(gan)(gan)時，電(dian)(dian)(dian)流量在同(tong)位(wei)(wei)置(zhi)繞制(zhi)的電(dian)(dian)(dian)感(gan)(gan)線圈(quan)中造成(cheng)反(fan)方向的電(dian)(dian)(dian)磁場而互相相抵，這時一(yi)切正(zheng)常(chang)(chang)數據信號電(dian)(dian)(dian)流量關鍵(jian)受(shou)線圈(quan)電(dian)(dian)(dian)阻的危害(hai)(和小量因漏(lou)感(gan)(gan)導致(zhi)的減(jian)振(zhen))。
電(dian)(dian)源濾(lv)(lv)(lv)(lv)波(bo)(bo)(bo)(bo)(bo)器常用(yong)的(de)濾(lv)(lv)(lv)(lv)波(bo)(bo)(bo)(bo)(bo)電(dian)(dian)路有(you)(you)無源濾(lv)(lv)(lv)(lv)波(bo)(bo)(bo)(bo)(bo)和有(you)(you)源濾(lv)(lv)(lv)(lv)波(bo)(bo)(bo)(bo)(bo)兩大類(lei)。無源濾(lv)(lv)(lv)(lv)波(bo)(bo)(bo)(bo)(bo)的(de)主要形式有(you)(you)電(dian)(dian)容(rong)濾(lv)(lv)(lv)(lv)波(bo)(bo)(bo)(bo)(bo)、電(dian)(dian)感濾(lv)(lv)(lv)(lv)波(bo)(bo)(bo)(bo)(bo)和復式濾(lv)(lv)(lv)(lv)波(bo)(bo)(bo)(bo)(bo)（包括倒L型(xing)、LC濾(lv)(lv)(lv)(lv)波(bo)(bo)(bo)(bo)(bo)、LCπ型(xing)濾(lv)(lv)(lv)(lv)波(bo)(bo)(bo)(bo)(bo)和RCπ型(xing)濾(lv)(lv)(lv)(lv)波(bo)(bo)(bo)(bo)(bo)等）。有(you)(you)源濾(lv)(lv)(lv)(lv)波(bo)(bo)(bo)(bo)(bo)的(de)主要形式是有(you)(you)源RC濾(lv)(lv)(lv)(lv)波(bo)(bo)(bo)(bo)(bo)，也(ye)被稱作電(dian)(dian)子濾(lv)(lv)(lv)(lv)波(bo)(bo)(bo)(bo)(bo)器。直(zhi)流電(dian)(dian)中(zhong)的(de)脈(mo)動成分(fen)的(de)大小用(yong)脈(mo)動系數S來(lai)表示，此值越大，則(ze)濾(lv)(lv)(lv)(lv)波(bo)(bo)(bo)(bo)(bo)器的(de)濾(lv)(lv)(lv)(lv)波(bo)(bo)(bo)(bo)(bo)效(xiao)果越差(cha)。
當有電(dian)(dian)流(liu)量(liang)流(liu)過(guo)電(dian)(dian)磁(ci)線(xian)圈時，因為(wei)(wei)(wei)共模電(dian)(dian)流(liu)量(liang)的(de)同向(xiang)性，會(hui)在(zai)電(dian)(dian)磁(ci)線(xian)圈內造成(cheng)同方向(xiang)的(de)電(dian)(dian)磁(ci)場而擴(kuo)大電(dian)(dian)磁(ci)線(xian)圈的(de)感(gan)抗，使電(dian)(dian)磁(ci)線(xian)圈主要表(biao)現為(wei)(wei)(wei)高特性阻抗，造成(cheng)很強的(de)減振實(shi)際效果，為(wei)(wei)(wei)此衰減系數(shu)共模電(dian)(dian)流(liu)量(liang)，大于過(guo)濾的(de)目地。
電(dian)(dian)源濾波(bo)器(qi)(qi)的(de)Y電(dian)(dian)容器(qi)(qi)是各自跨接線(xian)在電(dian)(dian)力線(xian)兩條線(xian)和地中間（L-E，N-E）的(de)電(dian)(dian)容器(qi)(qi)，通常是成雙出現(xian)，根據(ju)泄露電(dian)(dian)流的(de)限(xian)定，Y電(dian)(dian)容器(qi)(qi)值不可以很大，通常是nF級，Y電(dian)(dian)容器(qi)(qi)抑止共模(mo)干擾。
關(guan)于老吊車電源濾(lv)波(bo)器構成(cheng)電源電路的基本原理就介紹(shao)這里了，希望能夠幫(bang)助到您(nin)。
