[課業] 101養成班點工機械第5,6題

看板Examination作者 (帥哥)時間10年前 (2015/06/11 10:13), 編輯推噓4(4推 0噓 17→)
留言21則, 3人參與, 最新討論串1/1
http://i.imgur.com/aNW9GjO.jpg
第5題我是先算電流I=2A,然後算電壓整率3%。可是解答是6%。第6題是相關題也一起錯。 不知道算錯在那............ -- Sent from my Android -- ※ 發信站: 批踢踢實業坊(ptt.cc), 來自: 223.139.65.48 ※ 文章網址: https://www.ptt.cc/bbs/Examination/M.1433988812.A.C4B.html
推
06/11 11:21, , 1F
我也算3%
06/11 11:21, 1F
→
06/11 11:39, , 2F
解答錯?
06/11 11:39, 2F
推
06/11 11:59, , 3F
I=6000/3000=2
06/11 11:59, 3F
→
06/11 11:59, , 4F
p%=2*45/3000=3%
06/11 11:59, 4F
→
06/11 11:59, , 5F
q%=2*60/3000=4%
06/11 11:59, 5F
→
06/11 11:59, , 6F
最大電壓調整率=0.03+j0.04=0.05
06/11 11:59, 6F
→
06/11 11:59, , 7F
功率因素=0.03/0.05=0.06
06/11 11:59, 7F
推
06/11 12:46, , 8F
上面那是套用簡化後的公式
06/11 12:46, 8F
→
06/11 12:46, , 9F
另外用通用的電壓調整率公式去算
06/11 12:46, 9F
→
06/11 12:46, , 10F
第六題有電阻有電抗便可得公因0.6
06/11 12:46, 10F
→
06/11 12:46, , 11F
二次側電流為30
06/11 12:46, 11F
→
06/11 12:46, , 12F
換算到二次側電阻0.2電抗0.2666
06/11 12:46, 12F
→
06/11 12:46, , 13F
電壓實部：200*0.6+30*0.2
06/11 12:46, 13F
→
06/11 12:46, , 14F
電壓虛部：200*0.8+30*0.2666
06/11 12:46, 14F
→
06/11 12:46, , 15F
可得到無載二次電壓為210
06/11 12:46, 15F
→
06/11 12:46, , 16F
調整率：（210-200）/200=0.05
06/11 12:46, 16F
→
06/11 12:46, , 17F
然後上面那個另一個算法的公因不小心多打一個0去了
06/11 12:46, 17F
→
06/11 14:46, , 18F
實部虛部要分開算？？
06/11 14:46, 18F
→
06/11 14:47, , 19F
我是合在一起算
06/11 14:47, 19F
→
06/11 14:48, , 20F
功因我是用他給的阻抗算的
06/11 14:48, 20F
推
06/11 15:04, , 21F
06/11 15:04, 21F
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