Re: [問題] 電表量測問題
※ 引述《Maddulin (what else do u focus?)》之銘言:
: 所以任一訊號在定義下是不可能既為 AC 又為 DC
: 亦即AC/DC由定義, 本該為互斥, 這是定義下必然的邏輯, 有很難理解嗎?
AC <--------------> DC
有互斥嗎?兩者不是互斥關係吧...
當AC的頻率->0時,就是DC了。對於純直流,只是其函數沒有常數項。
例如 V(t) = VDC + VAC*sin(2*pi*60Hz+phi)
110V市電VAC = 110/1.414 ,VDC = 0
不過在電表上,VDC是量平均值 Vout = 0
VAC是量RMS值,Vout = 110
在電力系統,看到的比較多是DC或是純AC。但是在電子電路,通常
兩者是同時純在。
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