一、dcdc電源模塊原理是什么
dcdc電(dian)(dian)(dian)(dian)源模塊原理:假設Q為(wei)(wei)開(kai)(kai)關管,L為(wei)(wei)儲能電(dian)(dian)(dian)(dian)感,D為(wei)(wei)整(zheng)流(liu)管,C為(wei)(wei)濾波電(dian)(dian)(dian)(dian)容,RL為(wei)(wei)負載。當煽動脈沖為(wei)(wei)高(gao)電(dian)(dian)(dian)(dian)往常,開(kai)(kai)關管Q豐滿導通,整(zheng)流(liu)管D截(jie)止,輸(shu)入電(dian)(dian)(dian)(dian)壓加在電(dian)(dian)(dian)(dian)感L上,電(dian)(dian)(dian)(dian)感L以磁能辦法存儲能量,當Q截(jie)止時期,整(zheng)流(liu)管D導通,電(dian)(dian)(dian)(dian)感L貯存的(de)能量經D開(kai)(kai)釋,在電(dian)(dian)(dian)(dian)容C兩頭發作直流(liu)電(dian)(dian)(dian)(dian)壓,然后為(wei)(wei)負載RL供應供電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)源。在給(gei)定條件下,輸(shu)出端電(dian)(dian)(dian)(dian)壓的(de)凹凸由Q的(de)豐滿導通時刻(ke)長短挑選(xuan),即由基極(ji)所加煽動電(dian)(dian)(dian)(dian)壓的(de)脈沖寬(kuan)度挑選(xuan)。
二、dcdc電源模塊的優點有哪些
1、采用隔離式設計,可以有效(xiao)的(de)隔離來(lai)自一(yi)次側設備(bei)帶(dai)來(lai)的(de)共(gong)模干擾對系統的(de)影響,使負載(zai)能夠穩定的(de)工作(zuo)。
2、可以進(jin)行電壓(ya)轉換,不(bu)(bu)同的(de)(de)負(fu)載(zai)需(xu)要(yao)(yao)不(bu)(bu)同的(de)(de)供電電壓(ya),例如控(kong)制IC需(xu)要(yao)(yao)5V、3.3V、1.8V等;信號(hao)采集用的(de)(de)運放則需(xu)要(yao)(yao)±15V;繼(ji)電器(qi)則需(xu)要(yao)(yao)12V,24V。而母(mu)線(xian)電壓(ya)多為(wei)24V,因此需(xu)要(yao)(yao)進(jin)行電壓(ya)轉換。
3、輸出(chu)穩(wen)定、母線(xian)電壓(ya)在長距離傳輸過程中(zhong)會存在線(xian)損(sun),故到(dao)PCB板級(ji)時電壓(ya)較低,而負載需要穩(wen)定的(de)電壓(ya),因(yin)此需要寬壓(ya)輸入,穩(wen)壓(ya)輸出(chu)。
4、具備保護功能,電源需要在(zai)異(yi)常情況下,保護系統的負載和本(ben)身不壞(huai)。