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直流稳压装置原理及使用方法是什么？

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直流稳压装置原理及使用方法是什么？

浏览：46次 | 提问时间： 06-26 05:13

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我的言词掉落在地上 06-26 05:14

直流稳压电源是一种将220V工频交流电转换成稳压输出的直流电压的装置,它需要变压、整流、滤波、稳压四个环节才能完成。　　其中:　　(1)电源变压器:是降压变压器,它将电网220V交流电压变换成符合需要的交流电压,并送给整流电路,变压器的变比由变压器的副边电压确定。　　(2)整流电路:利用单向导电元件,把50Hz的正弦交流电变换成脉动的直流电。　　(3)滤波电路:可以将整流电路输出电压中的交流成分大部分加以滤除,从而得到比较平滑的直流电压。　　(4)稳压电路:稳压电路的功能是使输出的直流电压稳定,不随交流电网电压和负载的变化而变化。　　整流电路常采用二极管单相全波整流电路,即整流桥。u2的正半周内,二极管D1、D2导通,D3、D4截止;u2的负半周内,D3、D4导通,D1、D2截止。正负半周内部都有电流流过的负载电阻RL,且方向是一致的。

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