當今(jin)軟開關技(ji)術使得DC/DC發生(sheng)了質的飛躍，美國VICOR公司設計制造的多種ECI軟開關DC/DC變換器，其較(jiao)大輸(shu)出(chu)功率(lv)(lv)有300W、600W、800W等(deng)，相應(ying)的功率(lv)(lv)密(mi)度(du)為(wei)(wei)(wei)(6.2、10、17)W/cm3，效(xiao)率(lv)(lv)為(wei)(wei)(wei)（80～90）%。日本TDK-Lambda公司新推出(chu)的一(yi)(yi)種采(cai)用(yong)軟開關技(ji)術的高(gao)頻(pin)(pin)開關電(dian)(dian)源(yuan)(yuan)(yuan)模塊RM系(xi)列，其開關頻(pin)(pin)率(lv)(lv)為(wei)(wei)(wei)（200～300)kHz，功率(lv)(lv)密(mi)度(du)已達到27W/cm3，采(cai)用(yong)同步整(zheng)流(liu)器（MOSFET代替(ti)肖特基二極(ji)管），使整(zheng)個電(dian)(dian)路效(xiao)率(lv)(lv)提高(gao)到90%。在我(wo)國對電(dian)(dian)源(yuan)(yuan)(yuan)有相干的規定(ding)，動(dong)力(li)電(dian)(dian)電(dian)(dian)源(yuan)(yuan)(yuan)為(wei)(wei)(wei)三相380V、頻(pin)(pin)率(lv)(lv)50Hz的交流(liu)電(dian)(dian)。民用(yong)電(dian)(dian)電(dian)(dian)源(yuan)(yuan)(yuan)為(wei)(wei)(wei)單相220V、頻(pin)(pin)率(lv)(lv)50Hz的交流(liu)電(dian)(dian)。ac dc電(dian)(dian)源(yuan)(yuan)(yuan)模塊一(yi)(yi)般是(shi)為(wei)(wei)(wei)客戶(hu)提供一(yi)(yi)款超(chao)小體積模塊式開關電(dian)(dian)源(yuan)(yuan)(yuan)。黃(huang)浦區ACDC電(dian)(dian)源(yuan)(yuan)(yuan)模塊咨詢電(dian)(dian)話

AC-DC電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)模(mo)塊Buck降壓(ya)(ya)、非(fei)絕緣體(ti)(ti)例：Buck是降壓(ya)(ya)的(de)(de)(de)意思(si)，Buck轉換器(qi)(qi)(qi)是行(xing)(xing)使二極(ji)管(guan)整流(liu)(liu)的(de)(de)(de)降壓(ya)(ya)轉換器(qi)(qi)(qi)，反(fan)映性(xing)用(yong)(yong)途為(wei)用(yong)(yong)在非(fei)絕緣降壓(ya)(ya)開(kai)關的(de)(de)(de)DC-DC轉換器(qi)(qi)(qi)上。DC-DC轉換常(chang)稱(cheng)作(zuo)二極(ji)管(guan)整流(liu)(liu)式(shi)和異(yi)步式(shi)等。和上篇提到的(de)(de)(de)正(zheng)(zheng)激(ji)(ji)體(ti)(ti)例相(xiang)比，因(yin)(yin)為(wei)未(wei)使用(yong)(yong)變(bian)壓(ya)(ya)器(qi)(qi)(qi)，一(yi)次(ci)側和二次(ci)側并未(wei)絕緣。不(bu)需絕緣時，以不(bu)使用(yong)(yong)變(bian)壓(ya)(ya)器(qi)(qi)(qi)的(de)(de)(de)該體(ti)(ti)例較為(wei)簡(jian)單。Buck體(ti)(ti)例不(bu)必設定(ding)變(bian)壓(ya)(ya)器(qi)(qi)(qi)調整電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)，只要(yao)行(xing)(xing)使MOSFET控制，就(jiu)可以決(jue)定(ding)輸出(chu)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)。因(yin)(yin)此百度搜索排(pai)行(xing)(xing)，未(wei)必會必要(yao)來自于(yu)二次(ci)側的(de)(de)(de)反(fan)饋。Buck體(ti)(ti)例的(de)(de)(de)特性(xing)是電(dian)(dian)(dian)(dian)(dian)路構造簡(jian)單，組成(cheng)(cheng)(cheng)小功率(lv)電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)模(mo)塊電(dian)(dian)(dian)(dian)(dian)路時，成(cheng)(cheng)(cheng)本比反(fan)激(ji)(ji)式(shi)更有競(jing)爭力。因(yin)(yin)此，常(chang)使用(yong)(yong)在家電(dian)(dian)(dian)(dian)(dian)產(chan)品的(de)(de)(de)微(wei)控制器(qi)(qi)(qi)用(yong)(yong)電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)上。但是因(yin)(yin)為(wei)不(bu)必通過(guo)變(bian)壓(ya)(ya)器(qi)(qi)(qi)，流(liu)(liu)向開(kai)關元件(jian)的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)比采(cai)用(yong)(yong)反(fan)激(ji)(ji)體(ti)(ti)例的(de)(de)(de)劃一(yi)輸出(chu)功率(lv)還大，只適(shi)用(yong)(yong)于(yu)小功率(lv)輸出(chu)百度網站排(pai)名，而無法用(yong)(yong)于(yu)大功率(lv)輸出(chu)上。模(mo)式(shi)幾乎和正(zheng)(zheng)激(ji)(ji)體(ti)(ti)例雷同(tong)(tong)，只是去(qu)掉正(zheng)(zheng)激(ji)(ji)體(ti)(ti)例的(de)(de)(de)變(bian)壓(ya)(ya)器(qi)(qi)(qi)，將D1換成(cheng)(cheng)(cheng)MOSFET。MOSFET為(wei)ON時，電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)經過(guo)電(dian)(dian)(dian)(dian)(dian)感流(liu)(liu)向負(fu)載(zai)端(duan)，同(tong)(tong)時電(dian)(dian)(dian)(dian)(dian)感也積(ji)蓄(xu)(xu)電(dian)(dian)(dian)(dian)(dian)能(neng)。此時，二極(ji)管(guan)為(wei)OFF。MOSFET為(wei)OFF時，積(ji)蓄(xu)(xu)在電(dian)(dian)(dian)(dian)(dian)感的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)能(neng)經由二極(ji)管(guan)D2供應至負(fu)載(zai)端(duan)。和正(zheng)(zheng)激(ji)(ji)轉換器(qi)(qi)(qi)的(de)(de)(de)D1雷同(tong)(tong)，開(kai)啟或(huo)關閉(bi)MOSFET金山區(qu)ACDC電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)模(mo)塊生(sheng)產(chan)廠家有哪些電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)模(mo)塊是可以直接貼裝(zhuang)在印(yin)刷電(dian)(dian)(dian)(dian)(dian)路板上的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)供應器(qi)(qi)(qi)。

電(dian)(dian)源(yuan)模(mo)(mo)(mo)塊(kuai)(kuai)使(shi)(shi)用(yong)(yong)過熱(re)：與啟動(dong)相比(bi)，更嚴重(zhong)的(de)使(shi)(shi)用(yong)(yong)異常是(shi)電(dian)(dian)源(yuan)模(mo)(mo)(mo)塊(kuai)(kuai)在(zai)使(shi)(shi)用(yong)(yong)時非常熱(re)。此現象(xiang)的(de)根本原(yuan)因是(shi)電(dian)(dian)源(yuan)模(mo)(mo)(mo)塊(kuai)(kuai)在(zai)電(dian)(dian)壓(ya)轉(zhuan)換過程中發(fa)(fa)生能(neng)(neng)量損失，并且產生的(de)熱(re)量導致模(mo)(mo)(mo)塊(kuai)(kuai)產生熱(re)量并降低了電(dian)(dian)源(yuan)的(de)轉(zhuan)換效率(lv)。這可(ke)(ke)能(neng)(neng)會影響電(dian)(dian)源(yuan)模(mo)(mo)(mo)塊(kuai)(kuai)的(de)正(zheng)常運行，并可(ke)(ke)能(neng)(neng)影響附近其他設備的(de)性(xing)(xing)能(neng)(neng)，需要(yao)立即對(dui)其進行檢查。在(zai)什(shen)么情況下(xia)電(dian)(dian)源(yuan)模(mo)(mo)(mo)塊(kuai)(kuai)會變熱(re)？具體(ti)原(yuan)因如下(xia)：1.使(shi)(shi)用(yong)(yong)線(xian)性(xing)(xing)電(dian)(dian)源(yuan)模(mo)(mo)(mo)塊(kuai)(kuai)；2.負(fu)載(zai)(zai)過電(dian)(dian)流；3.負(fu)載(zai)(zai)太(tai)小；負(fu)載(zai)(zai)功(gong)率(lv)小于模(mo)(mo)(mo)塊(kuai)(kuai)電(dian)(dian)源(yuan)輸出功(gong)率(lv)的(de)10％，這可(ke)(ke)能(neng)(neng)導致模(mo)(mo)(mo)塊(kuai)(kuai)發(fa)(fa)熱(re)（效率(lv)太(tai)低）；4.環(huan)(huan)境(jing)溫度太(tai)高或散熱(re)措施不好。對(dui)于此類問題，可(ke)(ke)以通(tong)過優(you)化外部環(huan)(huan)境(jing)或調整負(fu)載(zai)(zai)來加以改進1.使(shi)(shi)用(yong)(yong)線(xian)性(xing)(xing)電(dian)(dian)源(yuan)時，請添(tian)加一個(ge)散熱(re)器；2.增加電(dian)(dian)源(yuan)模(mo)(mo)(mo)塊(kuai)(kuai)的(de)負(fu)載(zai)(zai)，以確保(bao)額定(ding)負(fu)載(zai)(zai)不少于10％；3.降低環(huan)(huan)境(jing)溫度并保(bao)持(chi)良好的(de)散熱(re)。

模塊電(dian)(dian)(dian)(dian)源(yuan)中(zhong)光耦的(de)(de)(de)(de)(de)(de)重(zhong)要應(ying)(ying)用(yong)(yong)：1、電(dian)(dian)(dian)(dian)氣隔離(li)的(de)(de)(de)(de)(de)(de)要求。A與(yu)(yu)B電(dian)(dian)(dian)(dian)路之(zhi)間關鍵詞排名，要進行旌(jing)(jing)旗燈(deng)(deng)號的(de)(de)(de)(de)(de)(de)傳輸(shu)(shu)，但兩(liang)(liang)電(dian)(dian)(dian)(dian)路之(zhi)間因為(wei)(wei)(wei)供(gong)(gong)電(dian)(dian)(dian)(dian)級(ji)別過于懸殊，一起(qi)為(wei)(wei)(wei)數百伏，另一起(qi)為(wei)(wei)(wei)幾伏。兩(liang)(liang)種(zhong)差異偉大的(de)(de)(de)(de)(de)(de)供(gong)(gong)電(dian)(dian)(dian)(dian)體(ti)(ti)系，無法將電(dian)(dian)(dian)(dian)源(yuan)共用(yong)(yong)。2、A電(dian)(dian)(dian)(dian)路與(yu)(yu)強電(dian)(dian)(dian)(dian)有(you)聯系，人體(ti)(ti)接(jie)觸有(you)觸電(dian)(dian)(dian)(dian)傷害，需(xu)予(yu)以隔離(li)。而B線路板為(wei)(wei)(wei)人體(ti)(ti)經常接(jie)觸的(de)(de)(de)(de)(de)(de)部分，也(ye)不應(ying)(ying)該將傷害高(gao)電(dian)(dian)(dian)(dian)壓(ya)混入到(dao)一路。兩(liang)(liang)者之(zhi)間新疆人事考試網(wang)，既要完成(cheng)旌(jing)(jing)旗燈(deng)(deng)號傳輸(shu)(shu)，又必(bi)須進行電(dian)(dian)(dian)(dian)氣隔離(li)。3、運(yun)放電(dian)(dian)(dian)(dian)路等高(gao)阻(zu)抗(kang)型器(qi)件(jian)的(de)(de)(de)(de)(de)(de)采用(yong)(yong)，和電(dian)(dian)(dian)(dian)路對模仿(fang)的(de)(de)(de)(de)(de)(de)薄弱的(de)(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)壓(ya)旌(jing)(jing)旗燈(deng)(deng)號的(de)(de)(de)(de)(de)(de)傳輸(shu)(shu)，使得對電(dian)(dian)(dian)(dian)路的(de)(de)(de)(de)(de)(de)抗(kang)干(gan)擾(rao)(rao)處理成(cheng)為(wei)(wei)(wei)一件(jian)比較(jiao)麻煩的(de)(de)(de)(de)(de)(de)事情。從各個途徑(jing)混入的(de)(de)(de)(de)(de)(de)噪聲干(gan)擾(rao)(rao)，有(you)可能反客為(wei)(wei)(wei)主，將有(you)效旌(jing)(jing)旗燈(deng)(deng)號吞沒掉。AC/DC電(dian)(dian)(dian)(dian)源(yuan)就是輸(shu)(shu)入為(wei)(wei)(wei)交流(liu)，輸(shu)(shu)出為(wei)(wei)(wei)直流(liu)的(de)(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)源(yuan)變(bian)換器(qi)。

AC-DC電(dian)(dian)(dian)源(yuan)的(de)(de)(de)基礎知識-反(fan)激(ji)式：反(fan)激(ji)式是常(chang)使(shi)(shi)用在小(xiao)功(gong)率電(dian)(dian)(dian)源(yuan)模塊上的(de)(de)(de)方法(fa)，反(fan)激(ji)體例分有(you)自勵型(xing)(xing)(xing)(xing)的(de)(de)(de)RCC（RingingChokeConverter）、他(ta)勵型(xing)(xing)(xing)(xing)的(de)(de)(de)PWM型(xing)(xing)(xing)(xing)、行使(shi)(shi)共振(zhen)(zhen)技術RCC準(zhun)(zhun)諧(xie)(xie)振(zhen)(zhen)型(xing)(xing)(xing)(xing)等3種。RCC型(xing)(xing)(xing)(xing)重要(yao)用在體系的(de)(de)(de)輔助電(dian)(dian)(dian)源(yuan)等小(xiao)功(gong)率用途(tu)(tu)，相(xiang)較(jiao)(jiao)于(yu)PWM型(xing)(xing)(xing)(xing)，設(she)計略(lve)為(wei)復雜(za)。近年PMW型(xing)(xing)(xing)(xing)內(nei)置MOSFETIC較(jiao)(jiao)普遍，小(xiao)功(gong)率用途(tu)(tu)上較(jiao)(jiao)常(chang)采用PWM型(xing)(xing)(xing)(xing)。準(zhun)(zhun)諧(xie)(xie)振(zhen)(zhen)型(xing)(xing)(xing)(xing)是行使(shi)(shi)專門(men)用的(de)(de)(de)IC進行控(kong)制，但(dan)(dan)噪聲比PWM低且損耗也(ye)較(jiao)(jiao)小(xiao)，因此部分應(ying)用會(hui)采用準(zhun)(zhun)諧(xie)(xie)振(zhen)(zhen)型(xing)(xing)(xing)(xing)。在AC-DC轉換時百度(du)搜索(suo)排行，開(kai)關體例的(de)(de)(de)AC-DC轉換較(jiao)(jiao)常(chang)使(shi)(shi)用，還可以用變(bian)壓(ya)(ya)(ya)器(qi)體例。和線(xian)性穩(wen)壓(ya)(ya)(ya)器(qi)相(xiang)比，反(fan)激(ji)式的(de)(de)(de)部件(jian)多且成(cheng)本(ben)高(gao)，限用于(yu)必須(xu)絕緣時。特性是構造(zao)簡(jian)單、部件(jian)數量少(shao)。不(bu)太要(yao)求(qiu)輸(shu)出(chu)(chu)(chu)(chu)精(jing)度(du)的(de)(de)(de)應(ying)用，能(neng)(neng)行使(shi)(shi)變(bian)壓(ya)(ya)(ya)器(qi)的(de)(de)(de)匝數比粗略(lve)設(she)定(ding)輸(shu)出(chu)(chu)(chu)(chu)電(dian)(dian)(dian)壓(ya)(ya)(ya)，也(ye)可以作為(wei)非穩(wen)固(gu)輸(shu)出(chu)(chu)(chu)(chu)電(dian)(dian)(dian)源(yuan)使(shi)(shi)用。為(wei)了能(neng)(neng)穩(wen)固(gu)輸(shu)出(chu)(chu)(chu)(chu)百度(du)網站(zhan)排名，必須(xu)增(zeng)長(chang)控(kong)制開(kai)關用晶體管的(de)(de)(de)電(dian)(dian)(dian)路(lu)。其他(ta)還有(you)輸(shu)入電(dian)(dian)(dian)壓(ya)(ya)(ya)范圍大(da)等好處(chu)，但(dan)(dan)也(ye)存在著(zhu)較(jiao)(jiao)大(da)的(de)(de)(de)峰值電(dian)(dian)(dian)流，會(hui)流向開(kai)關元(yuan)件(jian)、二極管、輸(shu)出(chu)(chu)(chu)(chu)電(dian)(dian)(dian)容(rong)器(qi)的(de)(de)(de)瑕玷。行使(shi)(shi)光耦(ou)合器(qi)隔(ge)離二次側（輸(shu)出(chu)(chu)(chu)(chu)）端的(de)(de)(de)反(fan)饋，如此一來就(jiu)能(neng)(neng)形成(cheng)絕緣電(dian)(dian)(dian)源(yuan)了。ACDC模塊電(dian)(dian)(dian)源(yuan)容(rong)量的(de)(de)(de)容(rong)量和電(dian)(dian)(dian)感是成(cheng)正(zheng)比的(de)(de)(de)。黑龍江(jiang)ACDC電(dian)(dian)(dian)源(yuan)模塊咨(zi)詢電(dian)(dian)(dian)話

使得解決EMC電磁兼容問題(ti)難度加大，也就(jiu)對(dui)內部高密度安裝電路設計提(ti)出(chu)了很高的要求。黃浦區ACDC電源模(mo)塊(kuai)咨(zi)詢(xun)電話

電(dian)源(yuan)(yuan)(yuan)模(mo)(mo)塊(kuai)(kuai)(kuai)有哪幾種？隨著電(dian)子行業技術的進步，電(dian)源(yuan)(yuan)(yuan)模(mo)(mo)塊(kuai)(kuai)(kuai)已經不能(neng)簡單的列舉它有幾種了，分(fen)(fen)(fen)類的方式都有很多(duo)種類。不管怎么分(fen)(fen)(fen)，選擇(ze)合適自身的才是較(jiao)好的。從不同應用上來(lai)看，大(da)致可分(fen)(fen)(fen)為(wei)(wei)以下幾種。1、按輸入(ru)輸出類型分(fen)(fen)(fen)：主要(yao)(yao)分(fen)(fen)(fen)為(wei)(wei)交(jiao)流輸入(ru)AC-DC模(mo)(mo)塊(kuai)(kuai)(kuai)電(dian)源(yuan)(yuan)(yuan)和直流輸入(ru)DC-DC模(mo)(mo)塊(kuai)(kuai)(kuai)電(dian)源(yuan)(yuan)(yuan)，以及DC-AC逆(ni)變電(dian)源(yuan)(yuan)(yuan)。2、按輸出功(gong)(gong)率(lv)(lv)分(fen)(fen)(fen)：AC-DC模(mo)(mo)塊(kuai)(kuai)(kuai)電(dian)源(yuan)(yuan)(yuan)主要(yao)(yao)分(fen)(fen)(fen)為(wei)(wei)小功(gong)(gong)率(lv)(lv)(3W~36W)、中率(lv)(lv)(50W~200W)、大(da)功(gong)(gong)率(lv)(lv)(>200W)。DC-DC模(mo)(mo)塊(kuai)(kuai)(kuai)電(dian)源(yuan)(yuan)(yuan)主要(yao)(yao)分(fen)(fen)(fen)為(wei)(wei)微功(gong)(gong)率(lv)(lv)電(dian)源(yuan)(yuan)(yuan)模(mo)(mo)塊(kuai)(kuai)(kuai)(0.1W~3W)、小功(gong)(gong)率(lv)(lv)電(dian)源(yuan)(yuan)(yuan)模(mo)(mo)塊(kuai)(kuai)(kuai)(1W~30W)、中率(lv)(lv)電(dian)源(yuan)(yuan)(yuan)模(mo)(mo)塊(kuai)(kuai)(kuai)(50W~200W)、大(da)功(gong)(gong)率(lv)(lv)電(dian)源(yuan)(yuan)(yuan)模(mo)(mo)塊(kuai)(kuai)(kuai)(>200W)。黃浦區ACDC電(dian)源(yuan)(yuan)(yuan)模(mo)(mo)塊(kuai)(kuai)(kuai)咨詢(xun)電(dian)話

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