三相感應電動機的鐵損(定子?轉子?)問題 - 考試
By James
at 2023-06-18T17:38
at 2023-06-18T17:38
Table of Contents
我是聽陳澤的TKB
他的講法是 直接給Rc的當定子鐵損看
直接給瓦特數值的當轉子鐵損看
(補充 轉部的旋轉損含機械損和轉子鐵損)
他書本裡的寫法也是這樣 例如:105年的關務四等
題目如下
https://i.imgur.com/ifQkBZl.jpg
他的解答
https://i.imgur.com/BKceqcR.jpg
要算氣隙功率Pag
是Pag=PIN-Pc1
也就是輸入功率 - 定子銅損
沒有減鐵損 所以是把題目1.2KW的鐵損視為轉子鐵損
=============================
但我看公職網上的109年普考 解答
https://i.imgur.com/T1uzrDE.jpg
鐵損1800W,解答算Pag時,是有減鐵損的
也就是把1800W 當定子鐵損算
另外 在網路上看到感應電動機的功率分布
大部分都是這樣
https://i.imgur.com/TlSdaC4.jpg
https://i.imgur.com/QhVscMZ.jpg
都只寫定子側有鐵損
然後我在YT找到一個教學影片
也有舉和109年普考的類似題
https://i.imgur.com/Zm1te0Q.jpg
一樣是把1800W當定子鐵損
================================
想問到底哪個觀念才是正確的?
考試時該怎麼寫?
畢竟這算基本題分數應該要拿到
但鐵損擺錯地方 會很慘
難道要兩種看法都寫嗎??
--
他的講法是 直接給Rc的當定子鐵損看
直接給瓦特數值的當轉子鐵損看
(補充 轉部的旋轉損含機械損和轉子鐵損)
他書本裡的寫法也是這樣 例如:105年的關務四等
題目如下
https://i.imgur.com/ifQkBZl.jpg
他的解答
https://i.imgur.com/BKceqcR.jpg
要算氣隙功率Pag
是Pag=PIN-Pc1
也就是輸入功率 - 定子銅損
沒有減鐵損 所以是把題目1.2KW的鐵損視為轉子鐵損
=============================
但我看公職網上的109年普考 解答
https://i.imgur.com/T1uzrDE.jpg
鐵損1800W,解答算Pag時,是有減鐵損的
也就是把1800W 當定子鐵損算
另外 在網路上看到感應電動機的功率分布
大部分都是這樣
https://i.imgur.com/TlSdaC4.jpg
https://i.imgur.com/QhVscMZ.jpg
都只寫定子側有鐵損
然後我在YT找到一個教學影片
也有舉和109年普考的類似題
https://i.imgur.com/Zm1te0Q.jpg
一樣是把1800W當定子鐵損
================================
想問到底哪個觀念才是正確的?
考試時該怎麼寫?
畢竟這算基本題分數應該要拿到
但鐵損擺錯地方 會很慘
難道要兩種看法都寫嗎??
--
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