不要(yao)將(jiang)濾(lv)波(bo)(bo)器安裝在設備(bei)(bei)(bei)屏(ping)蔽的(de)內(nei)(nei)部。因(yin)為這(zhe)樣，設備(bei)(bei)(bei)內(nei)(nei)部電路及(ji)元(yuan)件上的(de)EMI信(xin)號會因(yin)輻(fu)射(she)在濾(lv)波(bo)(bo)器的(de)端引線上生成EMI信(xin)號而直(zhi)接耦(ou)合到(dao)(dao)設備(bei)(bei)(bei)外面去，使設備(bei)(bei)(bei)屏(ping)蔽喪(sang)失對內(nei)(nei)部電路和元(yuan)件產生的(de)EMI輻(fu)射(she)的(de)抑(yi)制。建議(yi)利用(yong)設備(bei)(bei)(bei)原有的(de)屏(ping)蔽，將(jiang)濾(lv)波(bo)(bo)器的(de)輸(shu)入輸(shu)出端有效的(de)隔(ge)離開來(lai)，將(jiang)濾(lv)波(bo)(bo)器輸(shu)入輸(shu)出端間可能存在的(de)電磁耦(ou)合控制到(dao)(dao)比較低(di)程度(du)。一(yi)般濾(lv)波(bo)(bo)器的(de)殼(ke)體是接到(dao)(dao)所保(bao)護(hu)設備(bei)(bei)(bei)的(de)框架(jia)或機殼(ke)上，線側導線應保(bao)持(chi)短小并(bing)與負(fu)載側導線很好地隔(ge)離。理(li)想的(de)隔(ge)離系統(tong)是壁(bi)裝濾(lv)波(bo)(bo)器，帶(dai)有進線插座。雙相(xiang)通用(yong) RFI 電源線濾(lv)波(bo)(bo)器，雙 T 截面 RFI 濾(lv)波(bo)(bo)器提供更好的(de)性能。上海(hai)高性能濾(lv)波(bo)(bo)器設計規范

泄漏電(dian)流(liu)，根據(ju)設備泄漏電(dian)流(liu)可高達的(de)(de)(de)(de)允(yun)許值來(lai)選擇(ze)變(bian)(bian)頻(pin)(pin)器(qi)(qi)(qi)濾(lv)(lv)(lv)(lv)(lv)(lv)波(bo)(bo)(bo)器(qi)(qi)(qi)，尤其對(dui)一些醫療(liao)保健(jian)設備更是如比。變(bian)(bian)頻(pin)(pin)器(qi)(qi)(qi)濾(lv)(lv)(lv)(lv)(lv)(lv)波(bo)(bo)(bo)器(qi)(qi)(qi)的(de)(de)(de)(de)安裝(zhuang)位(wei)置(zhi)應靠(kao)近變(bian)(bian)頻(pin)(pin)器(qi)(qi)(qi)，盡量縮短引線(xian)長度(du)。確保變(bian)(bian)頻(pin)(pin)器(qi)(qi)(qi)濾(lv)(lv)(lv)(lv)(lv)(lv)波(bo)(bo)(bo)器(qi)(qi)(qi)外殼與機箱殼良好接(jie)觸。變(bian)(bian)頻(pin)(pin)器(qi)(qi)(qi)濾(lv)(lv)(lv)(lv)(lv)(lv)波(bo)(bo)(bo)器(qi)(qi)(qi)的(de)(de)(de)(de)輸(shu)入輸(shu)出(chu)線(xian)應拉開距離，切忌并行(xing)走線(xian),以免降低(di)變(bian)(bian)頻(pin)(pin)器(qi)(qi)(qi)濾(lv)(lv)(lv)(lv)(lv)(lv)波(bo)(bo)(bo)器(qi)(qi)(qi)的(de)(de)(de)(de)電(dian)性能(neng)。中(zhong)心頻(pin)(pin)率(lv)（CenterFrequency）：濾(lv)(lv)(lv)(lv)(lv)(lv)波(bo)(bo)(bo)器(qi)(qi)(qi)通(tong)帶(dai)(dai)(dai)的(de)(de)(de)(de)頻(pin)(pin)率(lv)f0，一般取(qu)f0=（f1+f2）/2，f1、f2為(wei)帶(dai)(dai)(dai)通(tong)或帶(dai)(dai)(dai)阻(zu)濾(lv)(lv)(lv)(lv)(lv)(lv)波(bo)(bo)(bo)器(qi)(qi)(qi)左(zuo)(zuo)、右相對(dui)下(xia)降1dB或3dB邊頻(pin)(pin)點。窄帶(dai)(dai)(dai)濾(lv)(lv)(lv)(lv)(lv)(lv)波(bo)(bo)(bo)器(qi)(qi)(qi)常以插損(sun)小(xiao)點為(wei)中(zhong)心頻(pin)(pin)率(lv)計算通(tong)帶(dai)(dai)(dai)帶(dai)(dai)(dai)寬(kuan)。截止頻(pin)(pin)率(lv)（CutoffFrequency）：指低(di)通(tong)濾(lv)(lv)(lv)(lv)(lv)(lv)波(bo)(bo)(bo)器(qi)(qi)(qi)的(de)(de)(de)(de)通(tong)帶(dai)(dai)(dai)右邊頻(pin)(pin)點及高通(tong)濾(lv)(lv)(lv)(lv)(lv)(lv)波(bo)(bo)(bo)器(qi)(qi)(qi)的(de)(de)(de)(de)通(tong)帶(dai)(dai)(dai)左(zuo)(zuo)邊頻(pin)(pin)點。通(tong)常以1dB或3dB相對(dui)損(sun)耗點來(lai)標準(zhun)(zhun)定義。相對(dui)損(sun)耗的(de)(de)(de)(de)參考(kao)基(ji)準(zhun)(zhun)為(wei)：低(di)通(tong)以DC處插損(sun)為(wei)基(ji)準(zhun)(zhun)，高通(tong)則以未出(chu)現寄生阻(zu)帶(dai)(dai)(dai)的(de)(de)(de)(de)足夠高通(tong)帶(dai)(dai)(dai)頻(pin)(pin)率(lv)處插損(sun)為(wei)基(ji)準(zhun)(zhun)。上海高性能(neng)濾(lv)(lv)(lv)(lv)(lv)(lv)波(bo)(bo)(bo)器(qi)(qi)(qi)設計規范(fan)適(shi)用于16 到 100 A 三(san)相 WYE RFI 電(dian)源(yuan)線(xian)濾(lv)(lv)(lv)(lv)(lv)(lv)波(bo)(bo)(bo)器(qi)(qi)(qi)。

電壓或電流的(de)(de)頻(pin)率越高(gao)(gao)，越容(rong)(rong)易(yi)產生輻射(she)，除了(le)改電路板、增加必要(yao)的(de)(de)磁環，其實還有(you)濾(lv)(lv)波(bo)(bo)(bo)器，很多時候，減(jian)少輻射(she)帶(dai)來(lai)干擾(rao)有(you)時候會加相(xiang)應的(de)(de)濾(lv)(lv)波(bo)(bo)(bo)器，這樣對于高(gao)(gao)頻(pin)干擾(rao)信(xin)號(hao)就能起到(dao)很大的(de)(de)衰減(jian)作用。對于普(pu)通干擾(rao)濾(lv)(lv)波(bo)(bo)(bo)器的(de)(de)有(you)效(xiao)濾(lv)(lv)波(bo)(bo)(bo)頻(pin)率范圍為(wei)數kHz到(dao)數十MHz，而射(she)頻(pin)干擾(rao)濾(lv)(lv)波(bo)(bo)(bo)器的(de)(de)有(you)效(xiao)濾(lv)(lv)波(bo)(bo)(bo)頻(pin)率范圍從數kHz到(dao)GHz以上(shang)。由于普(pu)通的(de)(de)電容(rong)(rong)不(bu)是理(li)想(xiang)電容(rong)(rong)，不(bu)能有(you)效(xiao)地(di)濾(lv)(lv)除高(gao)(gao)頻(pin)噪聲，這是由于電容(rong)(rong)引線電感造(zao)成電容(rong)(rong)諧振，對高(gao)(gao)頻(pin)信(xin)號(hao)呈(cheng)現較大的(de)(de)阻抗，削弱了(le)對高(gao)(gao)頻(pin)信(xin)號(hao)的(de)(de)旁路作用；導線之間的(de)(de)寄生電容(rong)(rong)使(shi)高(gao)(gao)頻(pin)信(xin)號(hao)發生耦合，降低了(le)濾(lv)(lv)波(bo)(bo)(bo)效(xiao)果。

濾波電(dian)(dian)(dian)(dian)(dian)(dian)(dian)容器可以(yi)降低電(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)的(de)交(jiao)流(liu)阻(zu)(zu)抗。這個(ge)(ge)說法是正確的(de)。原因是實(shi)際的(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)設備始終具有內部(bu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)。在(zai)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)的(de)輸(shu)(shu)出端添加了(le)一個(ge)(ge)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)容器，以(yi)便電(dian)(dian)(dian)(dian)(dian)(dian)(dian)容器可以(yi)提(ti)供瞬間(jian)上(shang)升并(bing)持續短時間(jian)的(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)，而瞬時下降并(bing)維持短時間(jian)的(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)使電(dian)(dian)(dian)(dian)(dian)(dian)(dian)容器反向(xiang)充電(dian)(dian)(dian)(dian)(dian)(dian)(dian)。這些(xie)瞬時電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)的(de)較大部(bu)分(fen)(fen)不必流(liu)過電(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)單元(yuan)的(de)內部(bu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)，而是直接在(zai)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)容器上(shang)交(jiao)換(huan)，從而可以(yi)減小(xiao)(xiao)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)單元(yuan)的(de)交(jiao)流(liu)阻(zu)(zu)抗。類似的(de)應(ying)用是電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路板IC電(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)附近的(de)去耦電(dian)(dian)(dian)(dian)(dian)(dian)(dian)容器。實(shi)際上(shang)，由于電(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)具有內部(bu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)并(bing)且傳輸(shu)(shu)線(xian)也(ye)具有阻(zu)(zu)抗，因此(ci)這也(ye)是其作(zuo)用。去耦電(dian)(dian)(dian)(dian)(dian)(dian)(dian)容器可以(yi)直接在(zai)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)容器上(shang)交(jiao)換(huan)部(bu)分(fen)(fen)瞬時電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)變化。小(xiao)(xiao)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路上(shang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)變化的(de)幅度(du)對IC的(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)產生積極影(ying)響(xiang)，還有助于減少對其他IC的(de)影(ying)響(xiang)。IEC 標準(zhun)插座可通過一個(ge)(ge)通用輸(shu)(shu)入插座適應(ying)不同(tong)的(de)國際電(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)線(xian)設計。

濾(lv)(lv)波(bo)(bo)器(qi)(qi)(qi)(qi)(qi)(qi)(qi)的(de)(de)本質是(shi)(shi)(shi)利用(yong)構造特定(ding)(ding)的(de)(de)阻抗特性(xing)引起反射和損耗來實現對頻(pin)(pin)率的(de)(de)選(xuan)擇(ze)。對于實際中的(de)(de)無(wu)源(yuan)濾(lv)(lv)波(bo)(bo)器(qi)(qi)(qi)(qi)(qi)(qi)(qi)(即非理(li)想(xiang)濾(lv)(lv)波(bo)(bo)器(qi)(qi)(qi)(qi)(qi)(qi)(qi))，通(tong)(tong)(tong)(tong)(tong)過(guo)濾(lv)(lv)波(bo)(bo)器(qi)(qi)(qi)(qi)(qi)(qi)(qi)時信(xin)(xin)(xin)號(hao)能(neng)(neng)量的(de)(de)損失不只(zhi)是(shi)(shi)(shi)體現在阻帶(dai)，也同樣體現在通(tong)(tong)(tong)(tong)(tong)帶(dai)內(顯(xian)然(ran)通(tong)(tong)(tong)(tong)(tong)帶(dai)不平(ping)坦(tan))。濾(lv)(lv)波(bo)(bo)器(qi)(qi)(qi)(qi)(qi)(qi)(qi)自身網絡的(de)(de)損耗不只(zhi)是(shi)(shi)(shi)阻抗性(xing)熱損耗，也可(ke)(ke)以(yi)(yi)是(shi)(shi)(shi)輻射性(xing)損耗。濾(lv)(lv)波(bo)(bo)器(qi)(qi)(qi)(qi)(qi)(qi)(qi)通(tong)(tong)(tong)(tong)(tong)帶(dai)內的(de)(de)插入(ru)損耗并不都是(shi)(shi)(shi)壞處，也可(ke)(ke)以(yi)(yi)作為濾(lv)(lv)波(bo)(bo)器(qi)(qi)(qi)(qi)(qi)(qi)(qi)設計(ji)的(de)(de)自由度加以(yi)(yi)利用(yong)。低頻(pin)(pin)濾(lv)(lv)波(bo)(bo)器(qi)(qi)(qi)(qi)(qi)(qi)(qi)是(shi)(shi)(shi)指(zhi)(zhi)低頻(pin)(pin)信(xin)(xin)(xin)號(hao)可(ke)(ke)以(yi)(yi)通(tong)(tong)(tong)(tong)(tong)過(guo)但高頻(pin)(pin)信(xin)(xin)(xin)號(hao)無(wu)法通(tong)(tong)(tong)(tong)(tong)過(guo)的(de)(de)濾(lv)(lv)波(bo)(bo)器(qi)(qi)(qi)(qi)(qi)(qi)(qi)；高頻(pin)(pin)濾(lv)(lv)波(bo)(bo)器(qi)(qi)(qi)(qi)(qi)(qi)(qi)是(shi)(shi)(shi)指(zhi)(zhi)高頻(pin)(pin)信(xin)(xin)(xin)號(hao)可(ke)(ke)以(yi)(yi)通(tong)(tong)(tong)(tong)(tong)過(guo)但低頻(pin)(pin)信(xin)(xin)(xin)號(hao)無(wu)法通(tong)(tong)(tong)(tong)(tong)過(guo)的(de)(de)濾(lv)(lv)波(bo)(bo)器(qi)(qi)(qi)(qi)(qi)(qi)(qi)；帶(dai)通(tong)(tong)(tong)(tong)(tong)濾(lv)(lv)波(bo)(bo)器(qi)(qi)(qi)(qi)(qi)(qi)(qi)是(shi)(shi)(shi)指(zhi)(zhi)在一定(ding)(ding)頻(pin)(pin)率范(fan)(fan)圍內的(de)(de)信(xin)(xin)(xin)號(hao)可(ke)(ke)以(yi)(yi)通(tong)(tong)(tong)(tong)(tong)過(guo)，而其他(ta)信(xin)(xin)(xin)號(hao)不能(neng)(neng)通(tong)(tong)(tong)(tong)(tong)過(guo)的(de)(de)濾(lv)(lv)波(bo)(bo)器(qi)(qi)(qi)(qi)(qi)(qi)(qi)；帶(dai)阻力濾(lv)(lv)波(bo)(bo)器(qi)(qi)(qi)(qi)(qi)(qi)(qi)是(shi)(shi)(shi)指(zhi)(zhi)在一定(ding)(ding)頻(pin)(pin)率范(fan)(fan)圍內的(de)(de)信(xin)(xin)(xin)號(hao)不能(neng)(neng)通(tong)(tong)(tong)(tong)(tong)過(guo)，而其他(ta)信(xin)(xin)(xin)號(hao)可(ke)(ke)以(yi)(yi)通(tong)(tong)(tong)(tong)(tong)過(guo)的(de)(de)濾(lv)(lv)波(bo)(bo)器(qi)(qi)(qi)(qi)(qi)(qi)(qi)。通(tong)(tong)(tong)(tong)(tong)用(yong) RFI 電(dian)源(yuan)線濾(lv)(lv)波(bo)(bo)器(qi)(qi)(qi)(qi)(qi)(qi)(qi) - 高阻抗負載的(de)(de)理(li)想(xiang)選(xuan)擇(ze)，非常(chang)適(shi)合(he)存在脈沖、連續和/或(huo)間歇性(xing) RFI 干擾的(de)(de)應(ying)用(yong)。三(san)相濾(lv)(lv)波(bo)(bo)器(qi)(qi)(qi)(qi)(qi)(qi)(qi)

帶開關(guan)或保險絲的雙結構(gou)電(dian)源輸入模塊。上海高性能濾(lv)波器(qi)設計規(gui)范(fan)

饋通濾(lv)波(bo)器(qi)具有小型化(hua)、大電(dian)(dian)(dian)流(liu)、高可靠、優異的溫度特(te)性、良好的浪(lang)涌(yong)抑制特(te)性等(deng)特(te)點，能很好解決通訊、電(dian)(dian)(dian)信等(deng)設備(bei)的高頻(pin)傳導干擾問題。三相(xiang)濾(lv)波(bo)器(qi)A系列，額(e)(e)定(ding)電(dian)(dian)(dian)壓(ya)(ya)相(xiang)對(dui)相(xiang)為(wei)(wei)440VAC，額(e)(e)定(ding)電(dian)(dian)(dian)壓(ya)(ya)相(xiang)對(dui)中線/地為(wei)(wei)250VAC，額(e)(e)定(ding)電(dian)(dian)(dian)流(liu)為(wei)(wei)20A/30A/45A/60A，工(gong)作頻(pin)率50/60HZ；三相(xiang)濾(lv)波(bo)器(qi)ADT系列，額(e)(e)定(ding)電(dian)(dian)(dian)壓(ya)(ya)相(xiang)對(dui)相(xiang)為(wei)(wei)480VAC，額(e)(e)定(ding)電(dian)(dian)(dian)壓(ya)(ya)相(xiang)對(dui)中線/地為(wei)(wei)277VAC，額(e)(e)定(ding)電(dian)(dian)(dian)流(liu)為(wei)(wei)63A/100A/160A/200A，工(gong)作頻(pin)率50/60HZ；三相(xiang)濾(lv)波(bo)器(qi)AQ系列，額(e)(e)定(ding)電(dian)(dian)(dian)壓(ya)(ya)為(wei)(wei)250VAC，額(e)(e)定(ding)電(dian)(dian)(dian)流(liu)為(wei)(wei)3A/6A，工(gong)作頻(pin)率50/60HZ。上(shang)海高性能濾(lv)波(bo)器(qi)設計規范(fan)

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