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逆(ni)變(bian)(bian)器總成(cheng)逆(ni)變(bian)(bian)器作用就(jiu)是把(ba)直流(liu)(liu)電變(bian)(bian)換(huan)為交流(liu)(liu)電，逆(ni)變(bian)(bian)器主流(liu)(liu)有2種(zhong)連接方式：
1、直接連(lian)在汽車電瓶上，功率(lv)較高，可(ke)以(yi)為更(geng)多大(da)功率(lv)用電器使用，缺點(dian)是風險比較大(da)；
2、通過點煙(yan)器(qi)(qi)(qi)電(dian)源轉(zhuan)換(huan)，輸(shu)(shu)出功(gong)(gong)率(lv)比較(jiao)小(xiao)，但(dan)也(ye)(ye)足夠(gou)大多數小(xiao)型電(dian)器(qi)(qi)(qi)使用(yong)。逆(ni)變(bian)(bian)(bian)器(qi)(qi)(qi)是把(ba)直流(liu)電(dian)能（電(dian)池、蓄電(dian)瓶）轉(zhuan)變(bian)(bian)(bian)成交流(liu)電(dian)（一般為220V，50Hz正弦波），其由逆(ni)變(bian)(bian)(bian)橋、控制邏輯和濾波電(dian)路(lu)組成。逆(ni)變(bian)(bian)(bian)器(qi)(qi)(qi)在工作時其本(ben)身也(ye)(ye)要(yao)消耗一部分電(dian)力，因此輸(shu)(shu)入(ru)功(gong)(gong)率(lv)要(yao)大于其輸(shu)(shu)出功(gong)(gong)率(lv)。逆(ni)變(bian)(bian)(bian)器(qi)(qi)(qi)的效率(lv)即是逆(ni)變(bian)(bian)(bian)器(qi)(qi)(qi)輸(shu)(shu)出功(gong)(gong)率(lv)與輸(shu)(shu)入(ru)功(gong)(gong)率(lv)之比，即逆(ni)變(bian)(bian)(bian)器(qi)(qi)(qi)效率(lv)為輸(shu)(shu)出功(gong)(gong)率(lv)比上輸(shu)(shu)入(ru)功(gong)(gong)率(lv)。
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