自動化專業(yè)英語ppt課件-資料下載頁
2025-05-03 03:42本頁面
【正文】 can be excited by two field windings, a shunt field winding and a series field winding. The shunt winding has a large number of turns and takes only s small current (less than 5% of the rated armature current). This winding can be connected across the armature (., parallel with it), hence the name shunt winding. The series winding has fewer turns but carries a large current. It is connected in series with the armature, hence the name series winding. If both shunt and series winding are present, the series winding is wound on top of the shunt winding. 第7段 The varies connections of the field circuit and armature circuit are shown in Fig. 2. In the separately excited dc machine (), the field winding is excited from a separate source. In the selfexcited dc machine, the field winding can be connected in three different ways. The field winding may be connected in series with the armature (), resulting in a series dc machine。 it may be connected across the armature (., in shunt), resulting in a shunt machine ()。 or both shunt and series windings may be used (), resulting in a pound machine. 作業(yè) 為本文寫一篇 100— 150單詞的英文摘要，并選關鍵詞。 Translate the following into Chinese. 1. Most types of electrical motors can be made to rotate in either direction by some simple modifications of their winding connections. 2. The diagram is modified by replacing the shunt field coils with the run windings and the armature with the start windings. 3. A control circuit for threephase inductionmotor reversing is shown in Figure 1. 作業(yè)（續(xù)） Translate the following into Chinese. 4. Since only measurable parameters can be dealt with, the processing of the electrical signals is posed solely of arithmetical or logical operation. 5. The Application of CAN Bus in the Fuel Cell Car Drive System. 6. An adaptive Current Controller for Permanent Mag Synchronous Motor Drivers Based on DSP Technology. 作業(yè)（續(xù)） Translate the following into English. 1. 小一些的繞組稱為串聯繞組，因為它與公共繞組串聯聯接。 2. 采用能耗制動可以克服電機的慣性，使電機快速停下來。 3. 利用發(fā)電機可將機械能轉化為電能。 4. 本文簡單介紹了基于神經網絡 (neural work)預測控制 (predictive control)的基本原理。并且根據神經網絡所采用網絡模型的不同對預測模型進行了分類以及按照求解最優(yōu)控制作用方式的不同介紹了幾種常用的優(yōu)化算法。 5. 本文研究了無 UVW位置信號檢測的永磁同步電機控制方法。電極啟動過程分析表明，轉子的初始位置確定是問題的關鍵。本文提出了兩種不同負載類型傳動系統(tǒng)的電機轉子初始位置確定方法，并在一類實際系統(tǒng)中得到實現。結果表明本方法是可行的。
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