電氣類畢業(yè)設計外文翻譯

1、<p>　　附錄1 中文參考資料</p><p>　　1．變壓器是變換交流電壓、電流和阻抗的器件，當初級線圈中通有交流電流時，鐵芯（或磁芯）中便產生交流磁通，使次級線圈中感應出電壓（或電流）。變壓器由鐵芯（或磁芯）和線圈組成，線圈有兩個或兩個以上的繞組，其中接電源的繞組叫初級線圈，其余的繞組叫次級線圈。 </p><p>　　2. 理想變壓器 不計一次、二次繞組的電阻和鐵耗，其間

2、耦合系數(shù)K=1 的變壓器稱之為理想變壓器 描述理想變壓器的電動勢平衡方程式為e1(t) =-N1dφ/dt、e2(t)=-N2dφ/dt若一次、二次繞組的電壓、電動勢的瞬時值均按正弦規(guī)律變化，則有不計鐵心損失，根據(jù)能量守恒原理可得由此得出一次、二次繞組電壓和電流有效值的關系令K=N1/N2，稱為匝比（亦稱電壓比）。</p><p>　　3. 變壓器的結構簡介（1）鐵心是變壓器中主要的磁路部分。通常由含硅量較高，厚

3、度分別為0.35 mm\0.3mm\0.27 mm，表面涂有絕緣漆的熱軋或冷軋硅鋼片疊裝而成鐵心分為鐵心柱和橫片倆部分，鐵心柱套有繞組；橫片是閉合磁路之用鐵心結構的基本形式有心式和殼式兩種（2）繞組是變壓器的電路部分，它是用雙絲包絕緣扁線或漆包圓線繞成變壓器的基本原理是電磁感應原理，現(xiàn)以單相雙繞組變壓器為例說明其基本工作原理:當一次側繞組上加上電壓&Uacute;1時，流過電流&Iacute;1，在鐵芯中就產生交變磁通&

4、amp;Oslash;1，這些磁通稱為主磁通，在它作用下，兩側繞組分別感應電勢&Eacute;1，&Eacute;2，感應電勢公式為：E=4.44fN&Oslash;m 式中：E--感應電勢有效值，f--頻率，N--匝數(shù)，&Oslash;m--主磁通最大值，由于二次繞組與一次繞組匝數(shù)不同，感應電勢E1和E2大小也不同，當略去內阻抗壓降后，電壓&Uacute;1和&Uacute;2大小也就不

5、同。當變壓器二次側空載時，一次側僅流過主磁通的電流（&Iacute;0），這個電流稱為激磁電流。當二次側加負載流過</p><p>　　4. LM324系列器件為價格便宜的帶有真差動輸入的四運算放大器。與單電源應用場合的標準運算放大器相比，它們有一些顯著優(yōu)點。該四放大器可以工作在低到3.0伏或者高到32伏的電源下，靜態(tài)電流為MC1741的靜態(tài)電流的五分之一。共模輸入范圍包括負電源，因而消除了在許多應用場合

6、中采用外部偏置元件的必要性。每一組運算放大器，它有5個引出腳，其中“+”、“-”為兩個信號輸入端，“V+”、“V-”為正、負電源端，“Vo”為輸出端。兩個信號輸入端中，Vi-（-）為反相輸入端，表示運放輸出端Vo的信號與該輸入端的位相反；Vi+（+）為同相輸入端，表示運放輸出端Vo的信號與該輸入端的相位相同。LM324的特點：</p><p><b>　　1.短跑保護輸出</b></p

7、><p><b>　　2.真差動輸入級</b></p><p>　　3.可單電源工作：3V-32V</p><p>　　4.低偏置電流：最大100nA</p><p>　　5.每封裝含四個運算放大器。</p><p>　　6.具有內部補償?shù)墓δ堋?lt;/p><p>　　7.共模范

8、圍擴展到負電源</p><p>　　8.行業(yè)標準的引腳排列</p><p>　　9.輸入端具有靜電保護功能</p><p>　　附錄2 英文參考資料</p><p>　　1. Transformer is to transform AC voltage, current and impedance of the device, when th

9、e primary coil with alternating current, the core (or cores) will be generated in the exchange of flux, the secondary coil induces a voltage (or current). Transformer from the core (or core) and the coils, there are two

10、or more coil windings, in which power supply is called the primary coil winding, and the rest is called the secondary coil winding.</p><p>　　2. Ideal transformer, excluding primary and secondary winding resi

11、stance and iron loss, during which the coupling coefficient K = 1 of the transformer is called an ideal description of the ideal transformer transformer electromotive force balance equation for the e1 (t) =-N1 d φ / dt e

12、2 ( t) =-N2 d φ / dt if the primary and secondary winding voltage, electromotive force according to the instantaneous value of the sine rule changes, there is not total core losses, the energy conservation principl</p

13、><p>　　3. transformer structure Introduction 1. core transformer core is part of the main magnetic circuit. Silicon content is usually higher, respectively, the thickness of 0.35 mm \ 0.3mm \ 0.27 mm, coated wi

14、th insulating paint hot or cold-rolled silicon steel lamination core columns made of iron core is divided into two parts and horizontal slices, core columns sets are winding; horizontal slice is a closed circuit of the b

15、asic form with the core structure determined to 2-and shell-and-two. winding </p><p>　　4. LM324 series devices are cheap with a true differential input of four operational amplifiers. Single-supply applicati

16、ons with the standard operational amplifiers, they have some significant advantages. The four amplifiers can operate at low or high to 3.0 volts to 32 volts of power, the quiescent current for the MC1741 one-fifth of qui

17、escent current. Common mode input range includes the negative supply, thereby eliminating the use in many applications the need for external bias components. Op</p><p>　　1. Sprint to protect the output</p

18、><p>　　2. True differential input stage</p><p>　　3. Can be a single-supply operation: 3V-32V</p><p>　　4. Low Bias Current: 100nA</p><p>　　5. Each package contains four ope

19、rational amplifiers.</p><p>　　6. With internal compensation feature.</p><p>　　7. Common-mode range extends to negative supply</p><p>　　8. Industry-standard pinout</p><p&g