使用大功率直流電源，要點需注意

大功率直流電源，是維持電(dian)路中形成穩恒電(dian)壓(ya)電(dian)流的裝置(zhi)。如干(gan)電(dian)池(chi)(chi)、蓄電(dian)池(chi)(chi)、直流發電(dian)機等都需要用到直流電(dian)源。有如下(xia)使用要點。

可編程直流電(dian)源的使用常識：

1，電池負載應用

當大功率直流電(dian)源供(gong)應(ying)(ying)(ying)器(qi)對(dui)電(dian)池(chi)(chi)類負(fu)載充電(dian)應(ying)(ying)(ying)用時，為(wei)了防(fang)止誤接(jie)電(dian)池(chi)(chi)的極性導致電(dian)源供(gong)應(ying)(ying)(ying)器(qi)的損壞，應(ying)(ying)(ying)在電(dian)源供(gong)應(ying)(ying)(ying)器(qi)與電(dian)池(chi)(chi)之間串接(jie)二極管，以保護(hu)大功率直流穩壓(ya)電(dian)源供(gong)應(ying)(ying)(ying)器(qi)的安全使(shi)用。

2,電感負載應用

當大功(gong)率直流(liu)電(dian)源供(gong)應(ying)器(qi)(qi)時(shi)(shi)或者(zhe)改變輸出電(dian)壓時(shi)(shi)，電(dian)感(gan)(gan)性負(fu)載會產生反(fan)方向感(gan)(gan)應(ying)電(dian)動勢影響可編(bian)程(cheng)直流(liu)電(dian)源供(gong)應(ying)器(qi)(qi)的(de)(de)工作，甚至會導致可編(bian)程(cheng)直流(liu)電(dian)源供(gong)應(ying)器(qi)(qi)的(de)(de)損壞，此時(shi)(shi)，在大功(gong)率直流(liu)電(dian)源供(gong)應(ying)器(qi)(qi)的(de)(de)輸出端與負(fu)載之間串聯一(yi)只(zhi)(zhi)二極管(guan)，并且在負(fu)載端并聯一(yi)只(zhi)(zhi)功(gong)率電(dian)阻和(he)一(yi)只(zhi)(zhi)電(dian)容器(qi)(qi)組(zu)成的(de)(de)RC 吸(xi)收(shou)電(dian)路，能夠(gou)有效保護可編(bian)程(cheng)直流(liu)電(dian)源供(gong)應(ying)器(qi)(qi);

3,脈沖負載應用

脈(mo)沖類負(fu)載的(de)電(dian)(dian)(dian)(dian)流峰值即使在(zai)大(da)(da)功(gong)率(lv)直流電(dian)(dian)(dian)(dian)源(yuan)(yuan)供(gong)應器(qi)(qi)(qi)輸出(chu)額(e)定(ding)電(dian)(dian)(dian)(dian)流值范圍(wei)內，或(huo)者脈(mo)沖類電(dian)(dian)(dian)(dian)路或(huo)電(dian)(dian)(dian)(dian)動(dong)機驅動(dong)電(dian)(dian)(dian)(dian)路負(fu)載電(dian)(dian)(dian)(dian)流波形，在(zai)計量設(she)備所指示的(de)標(biao)稱值(平均值)內。電(dian)(dian)(dian)(dian)流也會達(da)到可編(bian)程直流電(dian)(dian)(dian)(dian)源(yuan)(yuan)供(gong)應器(qi)(qi)(qi)額(e)定(ding)電(dian)(dian)(dian)(dian)流區域，從而使輸出(chu)電(dian)(dian)(dian)(dian)壓下(xia)降(jiang)或(huo)者顯(xian)得不穩定(ding)。解(jie)決方法是在(zai)電(dian)(dian)(dian)(dian)源(yuan)(yuan)供(gong)應器(qi)(qi)(qi)與(yu)負(fu)載之間串接電(dian)(dian)(dian)(dian)感器(qi)(qi)(qi)，或(huo)者選擇輸出(chu)電(dian)(dian)(dian)(dian)流更大(da)(da)的(de)可編(bian)程直流電(dian)(dian)(dian)(dian)源(yuan)(yuan)供(gong)應器(qi)(qi)(qi)。

4,反向電流的負載應用

當連接在大功率直流(liu)電(dian)源(yuan)供應器輸(shu)出端(duan)的(de)(de)電(dian)機(ji)突(tu)然(ran)剎車時(shi)，會產(chan)生(sheng)很(hen)大的(de)(de)反向(xiang)電(dian)流(liu)，由于大功率直流(liu)電(dian)源(yuan)供應器不能吸(xi)(xi)收從負載(zai)端(duan)產(chan)生(sheng)的(de)(de)反向(xiang)電(dian)流(liu)，因而輸(shu)出電(dian)壓會上升(sheng)。解(jie)決方法(fa)是在可編(bian)程直流(liu)電(dian)源(yuan)供應器的(de)(de)輸(shu)出端(duan)與負載(zai)之間(jian)串聯(lian)一(yi)只二極管(guan)，并在負載(zai)端(duan)并接一(yi)瀉放(fang)電(dian)阻來吸(xi)(xi)收反向(xiang)電(dian)流(liu)。當反向(xiang)電(dian)流(liu)為一(yi)尖峰(feng)突(tu)波時(shi)，請在負載(zai)兩端(duan)并接一(yi)個大容(rong)量電(dian)解(jie)電(dian)容(rong)。