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新聞資訊

大功率電源概述用途

大功率電源概述用途
  1。交流電源輸入經整流濾波成直流;
  2。通過高頻PWM(脈沖寬度調制)信號控制開關管,將那個直流加到開關變壓器初級上;
  3。開關變壓器次級感應出高頻電壓,經整流濾波供給負載;
  4。大功率電源輸出部分通過一定的電路反饋給控制電路,控制PWM占空比,以達到穩定輸出的目的。
  5。交流電源輸入時一般要經過厄流圈一類的東西,過濾掉電網上的干擾,同時也過濾掉電源對電網的干擾;
  6。在功率相同時,開關頻率越高,開關變壓器的體積就越小,但對開關管的要求就越高;
  7。開關變壓器的次級可以有多個繞組或一個繞組有多個抽頭,以得到需要的輸出;
  8。大功率電源一般還應該增加一些保護電路,比如空載、短路等保護,否則可能會燒毀開關電源

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