

開關橋是(shi)由(you)四(si)只高速(su)開(kai)關二極管作橋式連接,有四個引出(chu)(chu)腳。兩只二極管負極的(de)連接(jie)點是全橋直流輸出(chu)(chu)端(duan)的(de)“正(zheng)極”,兩只二極管(guan)正(zheng)極的連接點是全橋直流(liu)輸(shu)出端的“負極”,外用絕緣塑(su)封而成。

開關橋是利用二極(ji)管單(dan)向導電(dian)(dian)(dian)(dian)性,把(ba)交(jiao)流電(dian)(dian)(dian)(dian)變換成直流電(dian)(dian)(dian)(dian),通過檢(jian)測直流電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)壓,從(cong)而達到監測主線電(dian)(dian)(dian)(dian)壓與電(dian)(dian)(dian)(dian)流目的。