定電壓模式與定電流模式的基本定義所謂定電壓模式是指負載的電流值在額定范圍內變化, 直流穩壓電源的輸出電壓保持穩定的工作模式, 即當(dang)負載改變(bian)而導致(zhi)輸出電流變(bian)化時,輸出電壓(ya)仍維持(chi)在設定的電壓(ya)值并保持(chi)不(bu)變(bian)。
定(ding)電(dian)(dian)(dian)流模式是指直流負載的(de)(de)電(dian)(dian)(dian)阻值在(zai)額(e)定(ding)范圍內變(bian)化,而直流電(dian)(dian)(dian)源供應(ying)器的(de)(de)輸出電(dian)(dian)(dian)流保持(chi)穩定(ding)的(de)(de)工(gong)作模式, 即當負載(zai)的(de)電阻值(zhi)改(gai)變(bian)而(er)導致輸出(chu)電壓變(bian)化時,輸出(chu)電流仍維持在設定的(de)電流值(zhi)并(bing)保持不變(bian)。
具有定電(dian)壓 / 定(ding)(ding)電(dian)(dian)(dian)流(liu)(liu)模(mo)式(shi)的(de)直流(liu)(liu)電(dian)(dian)(dian)源(yuan)供應器工(gong)作(zuo)時的(de)工(gong)作(zuo)模(mo)式(shi)狀(zhuang)態,應該根據負(fu)(fu)(fu)載(zai)性質決(jue)定(ding)(ding)。一般情(qing)況下,負(fu)(fu)(fu)載(zai)加載(zai)額定(ding)(ding)電(dian)(dian)(dian)壓,當(dang)實際負(fu)(fu)(fu)載(zai)電(dian)(dian)(dian)流(liu)(liu)值小于設定(ding)(ding)電(dian)(dian)(dian)流(liu)(liu)值時,直流(liu)(liu)電(dian)(dian)(dian)源(yuan)供應器工(gong)作(zuo)于定(ding)(ding)電(dian)(dian)(dian)壓模(mo)式(shi);而當(dang)實際負(fu)(fu)(fu)載(zai)電(dian)(dian)(dian)流(liu)(liu)值大于設定(ding)(ding)電(dian)(dian)(dian)流(liu)(liu)值時,直流(liu)(liu)電(dian)(dian)(dian)源(yuan)供應器工(gong)作(zuo)于定(ding)(ding)電(dian)(dian)(dian)流(liu)(liu)模(mo)式(shi)。
定電壓模式與定電流模式的狀態是互補存在的,即直流電源供應器要么工作于定電壓模式,要么就工作于定電流模式。因此,使用者在操作前,首先應根據負載的使用性質和負載的電阻值,正確設定所需的電壓或電流值,選擇滿足負載要求的使用模式。
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