繼電器觸點防護方案及TVS管選型選用
更新(xin)時間:2023-04-11來源:wnjkaiwei.cn
新老(lao)電(dian)(dian)(dian)(dian)(dian)子工程師都知道(dao),繼電(dian)(dian)(dian)(dian)(dian)器的(de)觸(chu)(chu)點保護要(yao)比Mosfet更加殘酷(ku),一般繼電(dian)(dian)(dian)(dian)(dian)器的(de)負載要(yao)比Mosfet大(da)很多。常見的(de)直(zhi)流(liu)大(da)的(de)負荷直(zhi)流(liu)電(dian)(dian)(dian)(dian)(dian)動機,直(zhi)流(liu)離合器和直(zhi)流(liu)電(dian)(dian)(dian)(dian)(dian)磁閥,這些感性負載開關(guan)關(guan)閉,數百(bai)甚至(zhi)幾千伏的(de)反電(dian)(dian)(dian)(dian)(dian)動勢造成的(de)浪(lang)湧會把觸(chu)(chu)點壽命(ming)降低甚至(zhi)徹底損壞。當然(ran)如(ru)果電(dian)(dian)(dian)(dian)(dian)流(liu)較(jiao)小,比如(ru)在1A附(fu)近的(de)時(shi)候,反電(dian)(dian)(dian)(dian)(dian)動勢會造成電(dian)(dian)(dian)(dian)(dian)弧(hu)放(fang)(fang)電(dian)(dian)(dian)(dian)(dian),放(fang)(fang)電(dian)(dian)(dian)(dian)(dian)會導(dao)致金屬氧化物(wu)汙染(ran)觸(chu)(chu)點,導(dao)致觸(chu)(chu)點失(shi)效,接觸(chu)(chu)電(dian)(dian)(dian)(dian)(dian)阻變大(da)。
這裏(li)要提(ti)一(yi)下,繼電(dian)器(qi)始(shi)終是會失效的(de),我們做保護(hu),主要是希望延長繼電(dian)器(qi)的(de)使用(yong)時(shi)間。那(nei)麼,如何(he)選用(yong)保護(hu)器(qi)件來延長繼電(dian)器(qi)壽命(ming)呢(ni)?專業電(dian)路保護(hu)器(qi)件廠家及保護(hu)方案(an)服務商東沃電(dian)子(zi)(DOWOSEMI)技術針對繼電(dian)器(qi)使用(yong)壽命(ming)問(wen)題,設計了一(yi)個防護(hu)方案(an),如下圖所示(shi):
從繼電(dian)器觸點防護方案圖可以(yi)看出(chu),東沃電(dian)子技術(shu)推(tui)薦選用(yong)KA系列(lie)高功率藍寶(bao)寶(bao)TVS二(er)極管(guan),其可提供浪湧1KA、3KA、6KA、10KA、15KA的通流能(neng)力,能(neng)夠保護瞬間幾KV的過壓(ya)電(dian)弧(hu),並鉗位電(dian)壓(ya),延長繼電(dian)器的使(shi)用(yong)壽命(ming)。東沃電(dian)子KA系列(lie)浪湧保護器件(jian),繼電(dian)器用(yong)TVS二(er)極管(guan),型號齊全:K1076、KA012、KA015、KA020、KA025、KA030、KA042、KA058、KA066、KA076、KA170、KA380、KA430、KB030、KB058、KB066、KB076、KB170、KB190、KB240、KB380、KB430、KC030、KC058、KC066、KC076、KC170、KC190、KC240、KC380、KC430、KD012、KD042、KD058、KD076。
東沃電子用KA系列TVS二極管全面量產、交期穩定、價格美麗、服務優質。同時,東沃電子擁有專業的應用實驗室,免費提供相關產品EMC測試服務,免費方案設計或整改優化,歡迎廣大新老客戶前來咨詢!想了解更多,可咨詢東沃電子產品工程師:137 5773 6996(微信同號)余工