[問題] 電機機械 效率與直流機(已解決)
半載效率算法應該是我寫的那樣吧?
1000*0.5=500
不過這樣算可變損是負的
二
http://i.imgur.com/cTNieps.jpg
此題的第三小題
我知道磁通量正比Ia
可是這題電阻也改了
這樣要怎麼算呢?
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※ 編輯: jiharn0611 (101.10.20.153), 04/30/2016 10:04:09