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AO204/SI
AO204/SI 價格:800  元(人民幣) 產地:德國
最少起訂量:1 發貨地:福建廈門
上架時間:2018-09-07 16:30:46 瀏覽量:467
廈門光沃自動化設備有限公司  
經營模式:經銷商 公司類型:其他有限責任公司
所屬行業:PLC控制系統 主要客戶:全國市場
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AO204/SI

AO204/SI

AO204/SI

《聯系人;歐先生》
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從工業領域到建筑工程,簡單易用的開關模式電源非常常見。直流電壓隨后被緩沖至電池,成為隨時可用的安全電力供給。事實如此簡單嗎?

工頻電源工作總是離不開變壓器。輸出的直流電,不管是調節的還是未調節的,都是首先在次級產生的。相比之下,開關電源是首先在初級進行整流,然后產生的直流電壓被分割為高頻,并通過一個小的高頻變壓器被傳送到次級(圖2)。開關電源允許寬范圍的輸入,還允許負載電流在0-100%的額定范圍內連續工作。

圖2: 無輸入濾波器的開關電源原理圖

在思考開關電源的輸入電路原理時,首先注意到的就是整流器。如果輸入不是交流電,而是直流電,將會發生什么?假設所有模塊都能“準確”運行,那么幾乎所有開關電源都可以直流電或者交流電輸入。然而,當發生故障,一臺不適用于直流電輸入的開關電源,很有可能導致火災,因為處理高壓直流電比起處理交流電要危險得多。

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