基本電學 RLC串並聯電路 - 考試
By Andy
at 2013-01-22T00:48
at 2013-01-22T00:48
Table of Contents
※ 引述《dokeo (鏡)》之銘言:
: http://ppt.cc/pxMz
: 求該負載之P
: 不知道是不是解答有問題,算了好久都不對orz
此題的觀念,有兩種方法
法一:硬幹法
請將元件並聯處化簡為串聯
再將之算出電流
最後利用
P = I^2 * R = 1600 W
Q = I^2 * Xc = 200 VAR
法二:速解法
這題考的是利用串聯轉並聯
Rs^2 + Xs^2
Rp = --------------
Rs
Rs^2 + Xs^2
Xp = --------------
Xs
-------------------------------------
| | | | |
| | | | |
| | | | |
| | | | |
100 V 50/3 12.5j 10 -10j
| | | | |
| | | | |
| | | | |
| | | | |
-------------------------------------
在轉換化的更簡如下
--------------------
| | |
| | |
| | |
| | |
100 V 25/4 -50j
| | |
| | |
| | |
| | |
-------------------
Pr = V^2 / R = 1600 W (電阻所消耗功率)
Pc = V^2 / Xc = 200 VAR (電容所消耗之虛功率)
故解答上的答案是正確的
想想看您有哪邊觀念沒念通的~
Parents
--
: http://ppt.cc/pxMz
: 求該負載之P
: 不知道是不是解答有問題,算了好久都不對orz
此題的觀念,有兩種方法
法一:硬幹法
請將元件並聯處化簡為串聯
再將之算出電流
最後利用
P = I^2 * R = 1600 W
Q = I^2 * Xc = 200 VAR
法二:速解法
這題考的是利用串聯轉並聯
Rs^2 + Xs^2
Rp = --------------
Rs
Rs^2 + Xs^2
Xp = --------------
Xs
-------------------------------------
| | | | |
| | | | |
| | | | |
| | | | |
100 V 50/3 12.5j 10 -10j
| | | | |
| | | | |
| | | | |
| | | | |
-------------------------------------
在轉換化的更簡如下
--------------------
| | |
| | |
| | |
| | |
100 V 25/4 -50j
| | |
| | |
| | |
| | |
-------------------
Pr = V^2 / R = 1600 W (電阻所消耗功率)
Pc = V^2 / Xc = 200 VAR (電容所消耗之虛功率)
故解答上的答案是正確的
想想看您有哪邊觀念沒念通的~
Parents
--
Tags:
考試
All Comments
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at 2013-01-26T18:03
at 2013-01-26T18:03
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at 2013-01-29T13:08
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