基本電學 - 特考
By Daniel
at 2013-05-05T13:25
at 2013-05-05T13:25
Table of Contents
考題:98鐵路特考(員級)第四題
題目網址:http://ppt.cc/dtaW
想法:
我看題目的意思是兩組Y行的三相連接
題目給了第一相的電壓,為何不是先把左邊的相電壓轉成線電壓再轉成右邊的相電壓?
所以右邊的相電壓應該也是100
然後再利用P=3VpIpcos@=3*100*[100/(18+j13)]*cos@
正解是直接求Z=Zs+ZL=2+j2+18+j13=25+j15
想不透@@
這樣會少算一個Zs進去
謝謝.
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特考
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