![解析：如何為開關電源選擇適合的電感]( "解析：如何為開關電源選擇適合的電感")
電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)感(gan)(gan)(gan)(gan)(gan)是開關(guan)(guan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源中常用(yong)的(de)(de)(de)(de)元件，由(you)于(yu)它(ta)的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)、電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓相位不(bu)同，所以理論上(shang)(shang)損(sun)耗為(wei)零。電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)感(gan)(gan)(gan)(gan)(gan)常為(wei)儲(chu)能(neng)(neng)元件，也常與(yu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)一(yi)(yi)(yi)(yi)起用(yong)在(zai)輸(shu)入濾(lv)波和(he)輸(shu)出濾(lv)波電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路上(shang)(shang)， 用(yong)來(lai)平(ping)滑電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)。電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)感(gan)(gan)(gan)(gan)(gan)也被稱為(wei)扼流(liu)(liu)(liu)(liu)圈，特(te)(te)(te)點(dian)是流(liu)(liu)(liu)(liu)過(guo)其上(shang)(shang)的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)有(you)“很(hen)大(da)的(de)(de)(de)(de)慣性(xing)(xing)(xing)”。換句話說，由(you)于(yu)磁通(tong)連(lian)續特(te)(te)(te)性(xing)(xing)(xing)，電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)感(gan)(gan)(gan)(gan)(gan)上(shang)(shang)的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)必須(xu)是連(lian)續的(de)(de)(de)(de)，否(fou)則(ze)將(jiang)會產生很(hen)大(da)的(de)(de)(de)(de) 電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓尖峰。 電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)感(gan)(gan)(gan)(gan)(gan)為(wei)磁性(xing)(xing)(xing)元件，自然有(you)磁飽(bao)和(he)的(de)(de)(de)(de)問題。有(you)的(de)(de)(de)(de)應(ying)用(yong)允許(xu)(xu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)感(gan)(gan)(gan)(gan)(gan)飽(bao)和(he)，有(you)的(de)(de)(de)(de)應(ying)用(yong)允許(xu)(xu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)感(gan)(gan)(gan)(gan)(gan)從(cong)一(yi)(yi)(yi)(yi)定電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)值(zhi)開始進入飽(bao)和(he)， 也有(you)的(de)(de)(de)(de)應(ying)用(yong)不(bu)允許(xu)(xu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)感(gan)(gan)(gan)(gan)(gan)出現(xian)飽(bao)和(he)，這要求在(zai)具體線(xian)路中進行(xing)區分(fen)。大(da)多數情況(kuang)下，電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)感(gan)(gan)(gan)(gan)(gan)工(gong)(gong)作在(zai)“線(xian)性(xing)(xing)(xing)區”，此時電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)感(gan)(gan)(gan)(gan)(gan)值(zhi)為(wei)一(yi)(yi)(yi)(yi)常數，不(bu)隨著端(duan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓與(yu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)而變化。但 是，開關(guan)(guan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源存(cun)在(zai)一(yi)(yi)(yi)(yi)個(ge)(ge)不(bu)可(ke)忽視(shi)的(de)(de)(de)(de)問題，即電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)感(gan)(gan)(gan)(gan)(gan)的(de)(de)(de)(de)繞(rao)線(xian)將(jiang)導(dao)致(zhi)兩個(ge)(ge)分(fen)布參(can)數(或寄生參(can)數)，一(yi)(yi)(yi)(yi)個(ge)(ge)是不(bu)可(ke)避免的(de)(de)(de)(de)繞(rao)線(xian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻，另(ling)一(yi)(yi)(yi)(yi)個(ge)(ge)是與(yu)繞(rao)制工(gong)(gong)藝、材料(liao)有(you)關(guan)(guan)的(de)(de)(de)(de)分(fen)布式 雜散電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)。雜散電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)在(zai)低頻(pin)時影響不(bu)大(da)，但隨頻(pin)率的(de)(de)(de)(de)提高(gao)而漸顯出來(lai)，當(dang)頻(pin)率高(gao)到某個(ge)(ge)值(zhi)以上(shang)(shang)時，電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)感(gan)(gan)(gan)(gan)(gan)也許(xu)(xu)變成電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)特(te)(te)(te)性(xing)(xing)(xing)了。如果(guo)將(jiang)雜散電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)“集中”為(wei)一(yi)(yi)(yi)(yi)個(ge)(ge)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)， 則(ze)從(cong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)感(gan)(gan)(gan)(gan)(gan)的(de)(de)(de)(de)等效電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路可(ke)以看(kan)出在(zai)某一(yi)(yi)(yi)(yi)頻(pin)率后所呈現(xian)的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)特(te)(te)(te)性(xing)(xing)(xing)。 當(dang)分(fen)析電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)感(gan)(gan)(gan)(gan)(gan)在(zai)線(xian)路中的(de)(de)(de)(de)工(gong)(gong)作狀況(kuang)或者繪制電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)波形圖(tu)時，不(bu)妨考慮下面(mian)幾(ji)個(ge)(ge)特(te)(te)(te)點(dian)： 1. 當(dang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)感(gan)(gan)(gan)(gan)(gan)L中有(you)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)I流(liu)(liu)(liu)(liu)過(guo)時，電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)感(gan)(gan)(gan)(gan)(gan)儲(chu)存(cun)的(de)(de)(de)(de)能(neng)(neng)量為(wei)： E=0.5×L×I2 (1) 2. 在(zai)一(yi)(yi)(yi)(yi)個(ge)(ge)開關(guan)(guan)周期中，電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)感(gan)(gan)(gan)(gan)(gan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)的(de)(de)(de)(de)變化(紋波電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)峰峰值(zhi))與(yu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)感(gan)(gan)(gan)(gan)(gan)兩端(duan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓的(de)(de)(de)(de)關(guan)(guan)系為(wei)： V=(L×di)/dt...
發布時間:
2013
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12
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11
瀏(liu)覽(lan)次(ci)數(shu)：210
![新產品-充電機]( "新產品-充電機")
友誼電(dian)(dian)(dian)(dian)源(yuan)為儲能(neng)項目(mu)(mu)開(kai)發了(le)新產品-充(chong)(chong)電(dian)(dian)(dian)(dian)機，可以運用(yong)于(yu)電(dian)(dian)(dian)(dian)動(dong)(dong)(dong)(dong)汽車(che)(che)(che)，叉車(che)(che)(che)，高爾夫代(dai)步車(che)(che)(che)等(deng)。電(dian)(dian)(dian)(dian)動(dong)(dong)(dong)(dong)汽車(che)(che)(che)作為綠色(se)交通工具(ju)，給人(ren)類社會帶來了(le)巨大(da)的(de)變(bian)化，是目(mu)(mu)前世界上(shang)唯一能(neng)到(dao)零(ling)排放的(de)機動(dong)(dong)(dong)(dong)車(che)(che)(che)，電(dian)(dian)(dian)(dian)動(dong)(dong)(dong)(dong)汽車(che)(che)(che)產能(neng)的(de)擴大(da)，對(dui)于(yu)電(dian)(dian)(dian)(dian)動(dong)(dong)(dong)(dong)汽車(che)(che)(che)用(yong)電(dian)(dian)(dian)(dian)池充(chong)(chong)電(dian)(dian)(dian)(dian)器(qi)有(you)了(le)一定的(de)需要。而友誼電(dian)(dian)(dian)(dian)源(yuan)此次開(kai)發的(de)電(dian)(dian)(dian)(dian)動(dong)(dong)(dong)(dong)車(che)(che)(che)充(chong)(chong)電(dian)(dian)(dian)(dian)機具(ju)有(you)如下特點指示功能(neng)：狀態指示：包括電(dian)(dian)(dian)(dian)池電(dian)(dian)(dian)(dian)壓(ya)(ya)不(bu)足、正(zheng)在充(chong)(chong)電(dian)(dian)(dian)(dian)充(chong)(chong)電(dian)(dian)(dian)(dian)結束；故障指示：直(zhi)流(liu)輸(shu)(shu)(shu)出(chu)(chu)測過(guo)(guo)(guo)電(dian)(dian)(dian)(dian)壓(ya)(ya)及欠(qian)電(dian)(dian)(dian)(dian)壓(ya)(ya)，溫(wen)度(du)(du)異常，主斷(duan)路器(qi)斷(duan)開(kai)，蓄電(dian)(dian)(dian)(dian)池溫(wen)度(du)(du)異常。保(bao)護(hu)(hu)(hu)(hu)功能(neng)：輸(shu)(shu)(shu)入(ru)過(guo)(guo)(guo)/欠(qian)壓(ya)(ya)保(bao)護(hu)(hu)(hu)(hu)：模(mo)塊(kuai)(kuai)具(ju)有(you)輸(shu)(shu)(shu)入(ru)過(guo)(guo)(guo)/欠(qian)壓(ya)(ya)保(bao)護(hu)(hu)(hu)(hu)功能(neng)。當(dang)(dang)輸(shu)(shu)(shu)入(ru)電(dian)(dian)(dian)(dian)壓(ya)(ya)小于(yu)313±10Vac或(huo)者大(da)于(yu)485±10Vac，模(mo)塊(kuai)(kuai)保(bao)護(hu)(hu)(hu)(hu)，無(wu)直(zhi)流(liu)輸(shu)(shu)(shu)出(chu)(chu)，保(bao)護(hu)(hu)(hu)(hu)指示燈(deng)（黃(huang)色(se)）亮(liang)。電(dian)(dian)(dian)(dian)壓(ya)(ya)恢(hui)復(fu)(fu)到(dao)335±10Vac～460±15Vac之間后(hou)，模(mo)塊(kuai)(kuai)自(zi)動(dong)(dong)(dong)(dong)恢(hui)復(fu)(fu)工作。輸(shu)(shu)(shu)出(chu)(chu)過(guo)(guo)(guo)壓(ya)(ya)保(bao)護(hu)(hu)(hu)(hu)/欠(qian)壓(ya)(ya)告警：模(mo)塊(kuai)(kuai)具(ju)有(you)輸(shu)(shu)(shu)出(chu)(chu)過(guo)(guo)(guo)壓(ya)(ya)保(bao)護(hu)(hu)(hu)(hu)欠(qian)壓(ya)(ya)告警功能(neng)。當(dang)(dang)輸(shu)(shu)(shu)出(chu)(chu)電(dian)(dian)(dian)(dian)壓(ya)(ya)大(da)于(yu)293±6Vdc時，模(mo)塊(kuai)(kuai)保(bao)護(hu)(hu)(hu)(hu)，無(wu)直(zhi)流(liu)輸(shu)(shu)(shu)出(chu)(chu)，保(bao)護(hu)(hu)(hu)(hu)指示燈(deng)（黃(huang)色(se)）亮(liang)。模(mo)塊(kuai)(kuai)不(bu)能(neng)自(zi)動(dong)(dong)(dong)(dong)恢(hui)復(fu)(fu)，必須將模(mo)塊(kuai)(kuai)斷(duan)電(dian)(dian)(dian)(dian)后(hou)重新上(shang)電(dian)(dian)(dian)(dian)。當(dang)(dang)輸(shu)(shu)(shu)出(chu)(chu)電(dian)(dian)(dian)(dian)壓(ya)(ya)小于(yu)198±1Vdc時，模(mo)塊(kuai)(kuai)告警，有(you)直(zhi)流(liu)輸(shu)(shu)(shu)出(chu)(chu)，保(bao)護(hu)(hu)(hu)(hu)指示燈(deng)（黃(huang)色(se)）亮(liang)。電(dian)(dian)(dian)(dian)壓(ya)(ya)恢(hui)復(fu)(fu)后(hou)，模(mo)塊(kuai)(kuai)輸(shu)(shu)(shu)出(chu)(chu)欠(qian)壓(ya)(ya)告警消失。短(duan)路回縮: 當(dang)(dang)模(mo)塊(kuai)(kuai)輸(shu)(shu)(shu)出(chu)(chu)短(duan)路時，輸(shu)(shu)(shu)出(chu)(chu)電(dian)(dian)(dian)(dian)流(liu)不(bu)大(da)于(yu)40%額定電(dian)(dian)(dian)(dian)流(liu)。短(duan)路因素排除后(hou)，模(mo)塊(kuai)(kuai)自(zi)動(dong)(dong)(dong)(dong)恢(hui)復(fu)(fu)正(zheng)常輸(shu)(shu)(shu)出(chu)(chu)。過(guo)(guo)(guo)溫(wen)保(bao)護(hu)(hu)(hu)(hu): 模(mo)塊(kuai)(kuai)的(de)進風口(kou)被堵住或(huo)環境溫(wen)度(du)(du)過(guo)(guo)(guo)高導致模(mo)塊(kuai)(kuai)內(nei)部的(de)溫(wen)度(du)(du)超(chao)過(guo)(guo)(guo)設(she)定值時，模(mo)塊(kuai)(kuai)會過(guo)(guo)(guo)溫(wen)保(bao)護(hu)(hu)(hu)(hu)，模(mo)塊(kuai)(kuai)面板的(de)保(bao)護(hu)(hu)(hu)(hu)...
發布時間(jian):
2013
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11
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29
瀏覽次數(shu)：740
![中國重塑全球led產業格局的機會來了]( "中國重塑全球led產業格局的機會來了")
——海(hai)外并購受阻(zu),品(pin)牌和(he)(he)銷售渠道(dao)拓展整合難(nan)度大(da)。“我(wo)(wo)們本計(ji)劃以晶能(neng)光(guang)電(dian)作為收(shou)購lumileds的(de)(de)(de)(de)產(chan)(chan)業(ye)(ye)(ye)(ye)承接平臺,這將(jiang)(jiang)大(da)幅提升(sheng)(sheng)國(guo)內(nei)led行(xing)業(ye)(ye)(ye)(ye)的(de)(de)(de)(de)技(ji)術(shu)及制(zhi)造能(neng)力(li),甚至(zhi)可(ke)能(neng)重塑(su)(su)全球led產(chan)(chan)業(ye)(ye)(ye)(ye)格局。”金沙江創(chuang)投聯合創(chuang)始人兼董事總(zong)經(jing)理伍伸俊(jun)說。——國(guo)際巨頭(tou)追(zhui)趕步伐加快(kuai),維持(chi)技(ji)術(shu)領先優(you)勢(shi)(shi)難(nan)度大(da)。“我(wo)(wo)國(guo)硅(gui)襯(chen)(chen)(chen)底(di)(di)led技(ji)術(shu)的(de)(de)(de)(de)先發(fa)優(you)勢(shi)(shi)面臨挑戰(zhan)。”晶能(neng)光(guang)電(dian)ceo王(wang)敏博士說,美(mei)(mei)(mei)國(guo)普瑞(rui)光(guang)、韓國(guo)三星、lg、劍橋大(da)學等(deng)(deng)一(yi)大(da)批(pi)led巨頭(tou)和(he)(he)研究機構也(ye)已紛紛“進軍”硅(gui)襯(chen)(chen)(chen)底(di)(di)led技(ji)術(shu)。2012年(nian)東芝公司(si)投入巨資并收(shou)購了美(mei)(mei)(mei)國(guo)的(de)(de)(de)(de)普瑞(rui)公司(si)的(de)(de)(de)(de)硅(gui)技(ji)術(shu)部門,曾三次發(fa)布硅(gui)襯(chen)(chen)(chen)底(di)(di)led芯(xin)片量產(chan)(chan)消息。“南(nan)昌光(guang)谷”需加大(da)支(zhi)(zhi)持(chi)led照明(ming)被公認(ren)為最具(ju)發(fa)展前景的(de)(de)(de)(de)高新(xin)技(ji)術(shu)之一(yi)。目(mu)前,全球80%的(de)(de)(de)(de)led產(chan)(chan)品(pin)在中(zhong)國(guo)制(zhi)造,但核(he)心技(ji)術(shu)掌握在日(ri)(ri)本的(de)(de)(de)(de)日(ri)(ri)亞和(he)(he)豐田(tian)合成、美(mei)(mei)(mei)國(guo)的(de)(de)(de)(de)科(ke)銳、歐(ou)洲(zhou)的(de)(de)(de)(de)飛利(li)(li)(li)浦和(he)(he)歐(ou)司(si)朗(lang)等(deng)(deng)五大(da)led廠(chang)商(shang)手中(zhong)。伍伸俊(jun)介紹說,“這五大(da)廠(chang)商(shang)之間交叉授權(quan),形成了牢固的(de)(de)(de)(de)專(zhuan)利(li)(li)(li)聯盟,我(wo)(wo)國(guo)led企業(ye)(ye)(ye)(ye)難(nan)以繞開其專(zhuan)利(li)(li)(li)鉗制(zhi)。”2015年(nian),我(wo)(wo)國(guo)半導(dao)體照明(ming)產(chan)(chan)業(ye)(ye)(ye)(ye)整體規(gui)模達到4245億元,但國(guo)內(nei)led企業(ye)(ye)(ye)(ye)普遍缺少核(he)心技(ji)術(shu)與品(pin)牌,多為代工廠(chang),受全球經(jing)濟下行(xing)影響,有上千家企業(ye)(ye)(ye)(ye)倒閉(bi)。業(ye)(ye)(ye)(ye)內(nei)人士認(ren)為,將(jiang)(jiang)獲得國(guo)家技(ji)術(shu)發(fa)明(ming)獎一(yi)等(deng)(deng)獎的(de)(de)(de)(de)硅(gui)襯(chen)(chen)(chen)底(di)(di)led技(ji)術(shu)產(chan)(chan)業(ye)(ye)(ye)(ye)發(fa)展上升(sheng)(sheng)為國(guo)家戰(zhan)略,支(zhi)(zhi)持(chi)擁有自主知識產(chan)(chan)權(quan)的(de)(de)(de)(de)硅(gui)襯(chen)(chen)(chen)底(di)(di)led技(ji)術(shu)升(sheng)(sheng)級和(he)(he)產(chan)(chan)業(ye)(ye)(ye)(ye)做(zuo)強,才能(neng)徹底(di)(di)改(gai)變我(wo)(wo)國(guo)led產(chan)(chan)業(ye)(ye)(ye)(ye)現狀、重塑(su)(su)全球led產(chan)(chan)業(ye)(ye)(ye)(ye)格局。——將(jiang)(jiang)硅(gui)襯(chen)(chen)(chen)底(di)(di)led...
發布時間:
2016
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11
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22
瀏覽(lan)次數：122