不知大家對BOOST變換器的啟動問題有什么高見?
BOOST變換器剛啟動,輸出電壓還沒有建立,此時如何抑制沖擊電流?
好象對于電流源型的變換器都有啟動沖擊電流很大的問題,通常是把儲能感設計成反激型式.
不知哪位高手能解釋一下工作原理!小弟在此先謝了!
不知大家對BOOST變換器的啟動問題有什么高見?
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給大家傳一個DELL服務器電源的電路圖,並請注意D102、Q001、RT1的應用
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@zero_lee
給大家傳一個DELL服務器電源的電路圖,並請注意D102、Q001、RT1的應用[圖片]500){this.resized=true;this.width=500;this.alt='這是一張縮略圖,點擊可放大。\n按住CTRL,滾動鼠標滾輪可自由縮放';this.style.cursor='hand'}"onclick="if(!this.resized){returntrue;}else{window.open('http://u.dianyuan.com/bbs/u/0/1074499223.jpg');}"onmousewheel="returnimgzoom(this);">
D102是為了防止L101在開機瞬間飽和的.
RT1和Q001也很常見.
RT1和Q001也很常見.
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@szrg
我也為此問題困惑我也為此問題困惑呀
Boost turning-on process
D102 is to pre-charge the boost output cap before boost circuti turning-on.
RT1 is to limit the inrush current.
Q001 is turned-on after boost circuit starts to work and it will short RT1 so that there is less power loss because Q001 is a SCR.
D102 is to pre-charge the boost output cap before boost circuti turning-on.
RT1 is to limit the inrush current.
Q001 is turned-on after boost circuit starts to work and it will short RT1 so that there is less power loss because Q001 is a SCR.
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