基本電學和電工機械 - 考試
By David
at 2015-07-31T22:42
at 2015-07-31T22:42
Table of Contents
題目很多
1.
http://imgur.com/Ad2b2KE
這題我t不知道要代多少下去算?
2.http://imgur.com/QZS2gVo
轉差率我算出來,但最大轉矩我照下面那個公式算不出來
題目說忽略定子阻抗,那R1、X1到底要不要計算?
還是能用P=T.w,w有轉差率能算出轉子轉速。
3.http://imgur.com/KZPEm5y
http://imgur.com/AYCRE4B
這一題我有算接近,不知道是不是正確算法?
我的問題是If=3A時,電樞電流80A是他的短路電流?
因為短路試驗的電流不是額定電流嗎?那不是22k/(1.732*220) 嗎?
4.http://imgur.com/6Q6qNWL
不知道為什麼圖轉向了?sorry
正確答案是0.707A角80度
我算0.353A角80度
求救TAT
5.http://imgur.com/74g4L8W
觀念題,我知道ABC都錯,但串激式V-Il曲線不是更低嗎?
而且他到飽和點後會崩潰一直往下掉不是嗎?
那怎麼V>E?
很多題,請大大幫忙,謝謝。
--
1.
http://imgur.com/Ad2b2KE
這題我t不知道要代多少下去算?
2.http://imgur.com/QZS2gVo
轉差率我算出來,但最大轉矩我照下面那個公式算不出來
題目說忽略定子阻抗,那R1、X1到底要不要計算?
還是能用P=T.w,w有轉差率能算出轉子轉速。
3.http://imgur.com/KZPEm5y
http://imgur.com/AYCRE4B
這一題我有算接近,不知道是不是正確算法?
我的問題是If=3A時,電樞電流80A是他的短路電流?
因為短路試驗的電流不是額定電流嗎?那不是22k/(1.732*220) 嗎?
4.http://imgur.com/6Q6qNWL
不知道為什麼圖轉向了?sorry
正確答案是0.707A角80度
我算0.353A角80度
求救TAT
5.http://imgur.com/74g4L8W
觀念題,我知道ABC都錯,但串激式V-Il曲線不是更低嗎?
而且他到飽和點後會崩潰一直往下掉不是嗎?
那怎麼V>E?
很多題,請大大幫忙,謝謝。
--
Tags:
考試
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