貼片電感都是(shi)由漆(qi)包(bao)(bao)線繞(rao)(rao)制(zhi)(zhi)(zhi)(zhi),有單(dan)線繞(rao)(rao)制(zhi)(zhi)(zhi)(zhi)和雙線繞(rao)(rao)制(zhi)(zhi)(zhi)(zhi)的區別。單(dan)線繞(rao)(rao)制(zhi)(zhi)(zhi)(zhi)意(yi)思是(shi):單(dan)根漆(qi)包(bao)(bao)線繞(rao)(rao)制(zhi)(zhi)(zhi)(zhi)于磁(ci)芯(xin)骨架;雙線繞(rao)(rao)制(zhi)(zhi)(zhi)(zhi)意(yi)思是(shi):兩根漆(qi)包(bao)(bao)線同時(shi)繞(rao)(rao)制(zhi)(zhi)(zhi)(zhi)于磁(ci)芯(xin)骨架。
貼片電感的(de)漆(qi)包(bao)線(xian)都是單線(xian)繞制,在什(shen)么情況(kuang)下,會選擇雙線(xian)繞制呢?
舉個例子(zi):兩款(kuan)感(gan)(gan)(gan)值相同的GCD105KT100貼片(pian)(pian)電感(gan)(gan)(gan),A為(wei)單(dan)線(xian)繞制貼片(pian)(pian)電感(gan)(gan)(gan),漆包線(xian)線(xian)徑為(wei)0.4;B為(wei)雙線(xian)繞制貼片(pian)(pian)電感(gan)(gan)(gan),單(dan)線(xian)線(xian)徑為(wei)0.25;客戶要(yao)求(qiu)溫升電流為(wei)5A,A加載到(dao)3A時(shi),溫度(du)已經很高,B的溫升電流為(wei)5.5A。
同樣的感(gan)值,A由于單線繞(rao)制,線徑(jing)較細(xi),溫(wen)升電流就(jiu)小,B雖然單根線徑(jing)沒有A的大,但雙線一起繞(rao)制,溫(wen)升電流就(jiu)可以達到客戶的要求。
如果貼片電感使用單線(xian)(xian)線(xian)(xian)徑更大的漆包線(xian)(xian),溫升(sheng)電流會(hui)更好嗎(ma)?雙線(xian)(xian)繞制還有(you)優勢嗎(ma)?
使用(yong)單(dan)線(xian)(xian)線(xian)(xian)徑更(geng)大的漆包線(xian)(xian),可(ke)以達到增大溫升電流的效(xiao)果,但和雙線(xian)(xian)繞制的貼(tie)片電感相比(bi),還是有差異(yi)。
1、雙線(xian)(xian)繞(rao)制的貼(tie)片電(dian)感,DCR較小。溫升電(dian)流就較大(da);單線(xian)(xian)線(xian)(xian)徑更大(da)的漆包線(xian)(xian),DCR較大(da)。
2、雙線(xian)繞制的貼片電感,做工更(geng)(geng)好,在折(zhe)腳時(shi),會更(geng)(geng)平整,單線(xian)線(xian)徑更(geng)(geng)大的漆包(bao)線(xian),由于線(xian)徑大,折(zhe)腳時(shi),會出現不(bu)平整的情況,焊(han)接時(shi),不(bu)好焊(han)接。
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