扇形轉子 的英文怎麼說
中文拼音 [shānxíngzhuǎnzi]
扇形轉子
英文
segmental rotor-
A device for converting energy form one form to another. in relation to computers, the term is applied to a read / write head, to detector of sector marks in a magnetic disc system, and to electronic / sonic pulse converters of delay line memory
把能量從一種形式轉換成另一種形式的裝置。在與計算機有關時，這個術語用在磁盤系統中的讀寫磁頭、扇面標記的檢測上，以及用在延遲線存儲器的電子或聲波脈沖變換器上。In seeking the door, i turned an angle : there shot out the friendly gleam again, from the lozenged panes of a very small latticed window, within a foot of the ground, made still smaller by the growth of ivy or some other creeping plant, whose leaves clustered thick over the portion of the house wall in which it was set
我轉了一個角度去找門，那裡又閃起了友好的燈光，是從一尺之內一扇格子小窗的菱形玻璃上射出來的，那扇窗因為長青藤或是滿墻的爬藤類植物的葉子，顯得更小了。Firstly, this paper introduces the asynchronous motor model, and compares it with the dc motor ’ s. then the paper studies the principle of vector control, and proposes an improved current model of rotor flux observer. this paper also studies the three - level inverter ’ s topology, working principle, the neutral - potential unbalance mechanism and its controlling strategy. the paper especially studies the svpwm in details. the interface between the vector control and the three - level inverter is studied in details, including the generation of reference voltage vector, its judging of the sector and triangular regions, and the working mechanism after it sent into three - level inverter. when synthesizing the reference voltage vector, select the vector which only includes p and o states as the starting vector, thus eliminate the vector shift problem when sector changes. this paper fully takes advantages of the powerful functions of matlab / simulink to set up the simulation model. this construction is very explicit. the simulation results verify the inverter voltage output is correct, the rotor flux is steady, the asynchronous motor ’ s dynamic and steady state performances and speed modulation are excellent
本文首先介紹了異步電機的數學模型，在此基礎上將異步電機的數學模型與直流電機的數學模型進行了比較;然後介紹了矢量控制的基本原理，採用了一種改進的轉子磁鏈電流型觀測模型;對三電平逆變器的電路拓撲、工作原理、中點電位不平衡的機理及控制方法進行了介紹，詳細分析了空間矢量脈寬調制策略。本文對異步電機的矢量控制與三電平逆變器之間的介面進行了詳細的研究，包括:參考電壓矢量的形成、所落扇區與具體小三角形區域的判斷、送入逆變器之後的工作機理。在參考電壓矢量的合成時，選擇只包含p 、 o狀態的空間電壓矢量作為起始矢量，解決了扇區切換時的矢量突變問題。
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