Re: [考題] 電機機械:－2016徵求年菜推薦網路訂購最紅的商家.年菜訂購?台北年菜外送餐廳推薦(年菜)?年菜.今年不想做年菜推薦,網路宅配哪一家好?

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批踢踢實業坊 Examination 板

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Re: [考題] 電機機械

Oct 1st 2013, 17:59, by luckyboy30

作者luckyboy30 (人生可以黑白不能迷彩)

看板Examination

標題Re: [考題] 電機機械

時間Tue Oct 1 17:59:16 2013

解答依照您解答 IL1= 200K/(√3*5K)=23.094∠-53.13°A 重點是 ∠IL1 是以 ∠Vφ 為基準 Iφ2=5000∠+30°/(150-j60)=30.95∠51.8° A IL2=√3Iφ2∠-30°=53.6∠21.8°A Is= IL1 + IL2 =63.65∠1.3 A 因為負載1說明 P.F.=0.6 lagging , θ是 ∠Vφ為基準有時候會忘了要 +30° or -30°傷腦筋類似題目建議用Y接單相分析比較簡單一些以上希望有解答到您的問題 ※ 引述《qqptt (夢想)》之銘言： : 出處:101台電 : 題目: : http://ppt.cc/-56X : 第三小題。 : 解答求三角負載電流用給定的負載線電壓 : 驉퐳。但三角接Vl=Vp,為什麼要除√3呢？ : 解答: : http://ppt.cc/Ph~H : 請幫忙解惑。感謝 -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 118.167.75.246 ※ 編輯: luckyboy30 來自: 118.167.75.246 (10/01 18:04)

推 qqptt:為什麼5000多了30度除150+j60 10/01 18:39

→ qqptt:三角的相電壓不是等於線電壓嗎？ 10/01 18:40

→ qqptt:抱歉我想了半小時了 10/01 18:40

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