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虛數並聯如何運算

Apr 22nd 2014, 15:24

最近在算基本電學,學到RLC並聯!
但是前幾章都是教虛數不好做乘除,故需轉為極座標!

但我看一些參考書都有辦法直接做運算!

例如 -j10*j20 / -j10+j20 = -j20

還有實數跟虛數並聯 ,例如

15*j20 / 15+j20 = j300(15-j20) / 625 = 9.6+ j7.2

我完全看不懂這種運算試是如何做計算的!
有人可否指點一下嗎?

對於RLC串並聯還有混和的串並聯要算F還有Q跟BW之類的看到有點眼花撩亂了!
很多算式都被公式,然後套值進去,公式差都一點點而已!
好不容易套對公式,套進去後又有計算不出來的問題!
實在有給他困擾到~"~

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