PSU的12V的意義代表什麼?? - 3C
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By Erin
at 2020-04-24T16:06
at 2020-04-24T16:06
Table of Contents
※ 引述《shinaka (活寶歷險記)》之銘言:
: 爬了很多國內外評測網站
: 幾乎都有在講12V紋波越小表示產品越利害...
: 求解真是這樣嗎?
: 12V 紋波次數多跟少 又差在哪裡?
: 傳說中的死人心電圖又代表什麼意思?
: 為什麼 都討論12V 不討論3.3V跟5V
推文已經解答主要討論12V的原因了
這邊大概講一下紋波
如果講錯還請各位大力鞭 小弟我會改正
首先 一般家庭的插座是110V交流電
波形大概長這樣
https://imgur.com/PmWtkbl.jpg
但是 電腦想要用的是直流電
理想的直流電是一直線沒有起伏的
(這裡以12V為例)
https://imgur.com/vsRjfXq.jpg
電源供應器的工作就是將交流電轉換成直流電
但是沒有電供是完美的
轉換後還是會有交流電的痕跡
另外將波形放大後會發現
裡面還會有很多細小的雜訊
圖中由紅色的"I"標示出的起伏都是電腦不想要的
https://imgur.com/wtXVjHq.jpg
因此電供的製造商必須想辦法
設計電路或用更好的材料來降低這些多餘的波紋
而主機板的製造商也得弄個保護機制
讓主機板可以"忍受"這些電壓起伏 而不至於被電壞
16:35編輯
再補充一個雜訊來源:震盪
簡單來說
電供在拉交流電不讓他亂跳的時候 有時會拉過頭(上面有解釋)
然後電供就會大喊:"幹! 過頭了"
為了要補救 會把電壓推回去 但是又會推過頭
在這樣不斷又推又拉的震盪中慢慢接近理想的電壓
把這個現象加進上面第三張圖片 畫誇張一點會長這樣
https://imgur.com/668ZE9H.jpg
--
: 爬了很多國內外評測網站
: 幾乎都有在講12V紋波越小表示產品越利害...
: 求解真是這樣嗎?
: 12V 紋波次數多跟少 又差在哪裡?
: 傳說中的死人心電圖又代表什麼意思?
: 為什麼 都討論12V 不討論3.3V跟5V
推文已經解答主要討論12V的原因了
這邊大概講一下紋波
如果講錯還請各位大力鞭 小弟我會改正
首先 一般家庭的插座是110V交流電
波形大概長這樣
https://imgur.com/PmWtkbl.jpg
但是 電腦想要用的是直流電
理想的直流電是一直線沒有起伏的
(這裡以12V為例)
https://imgur.com/vsRjfXq.jpg
電源供應器的工作就是將交流電轉換成直流電
但是沒有電供是完美的
轉換後還是會有交流電的痕跡
另外將波形放大後會發現
裡面還會有很多細小的雜訊
圖中由紅色的"I"標示出的起伏都是電腦不想要的
https://imgur.com/wtXVjHq.jpg
因此電供的製造商必須想辦法
設計電路或用更好的材料來降低這些多餘的波紋
而主機板的製造商也得弄個保護機制
讓主機板可以"忍受"這些電壓起伏 而不至於被電壞
16:35編輯
再補充一個雜訊來源:震盪
簡單來說
電供在拉交流電不讓他亂跳的時候 有時會拉過頭(上面有解釋)
然後電供就會大喊:"幹! 過頭了"
為了要補救 會把電壓推回去 但是又會推過頭
在這樣不斷又推又拉的震盪中慢慢接近理想的電壓
把這個現象加進上面第三張圖片 畫誇張一點會長這樣
https://imgur.com/668ZE9H.jpg
--
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By Barb Cronin
at 2020-10-27T00:42
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at 2020-10-28T04:20
at 2020-10-28T04:20
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at 2020-10-29T05:40
at 2020-10-29T05:40
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By Catherine
at 2020-11-02T03:18
at 2020-11-02T03:18
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