請問一題全波整流電路考題:Realtime－線上遊戲排行榜2013/2014,進擊的巨人線上看,candy crush saga外掛,正妹寫真三圍

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請問一題全波整流電路考題

Dec 7th 2014, 13:22

120sin(120πt)v代表的意思是?

A：原始交流電壓式為：Vm sin(wt)= Vm sin(2πft)

120 為Vm(電壓最大值)
Sin (或cos) 是交流弦波(交流電)
120πt=2πft=wt 是週期時間。頻率f為60Hz

P 是Pi(π)的縮寫，π為圓周率=3.1415……
Vav=Vdc=(2/π)Vm=0.636 Vm 全波整流平均值公式

所以12 sin(120πt)的Vav為
12x(2/π)=24/π=24/Pi

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