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1、成绩南京工程学院期末考查报告书电气工程专业外语B 院（系、部、中心） 电力工程学院 专 业 班 级 学 生 姓 名 学 号 任 课 教 师 年 月 南 京Page1.The Production of Electrical Energy（电能生产）1 English textFrom reference 1 Electricity is a form of energy. Electricity is the flow of electrons. All matter is made up of atoms. and an atom has a center, called a nucleus
2、. The nucleus contains positively charged particles called protons and uncharged particles called neutrons. The nucleus of an atom is surrounded by negatively charged particles called electrons. The negative charge of an electron is equal to the positive charge of a proton, and the number of electro
3、ns in an atom is usually equal to the number of protons. When the balancing force between protons and electrons is upset by an outside force, an atom may gain or lose an electron. When electrons are lost from an atom, the free movement of these electrons constitutes an electric current. Electricity
4、is a basic part of nature and it is one of our most widely used forms of energy. We get electricity, which is a secondary energy source, from the conversion of other sources of energy, like coal, natural gas, oil, nuclear power and other natural sources, which are called primary sources. many cities
5、 and towns were built alongside waterfalls (a primary source of mechanical energy)that turned water wheels to perform work. Before electricity generation began slightly over 100 years ago, houses were lit with kerosene lamps, food was cooled in iceboxes, and rooms were warmed by wood-burning or coal
6、-burning stoves. Beginning with Benjamin Franklins experiment with a kite one stormy night in Philadelphia, the Philadelphia, the principles of electricity gradually became understood, in the mid-1800.Thomas Edison changed everyones life-he perfected his invention-the electric light bulb. Prior to 1
7、879, electricity had been used in arc lights for outdoor lighting. Edisons invention used electricity to bring in door lighting to our homes.Keywords：proton neutron electron2 中文翻译及分析出自文献1：电是能量的一种形式，是电子流。所有物质都是有原子构成，原子油一个中心，叫做核。核子内有些带正电荷的粒子，称为质子；不带电荷的分子称为中子。原子的核子被带负电荷的粒子包围，称为电子。电子的负电荷与质子的正电荷相等。一个原子力的
8、电子数量通常与质子的数量相等。当外力使质子和电子之间的平衡力遭到破坏时，原子就会增加或减少一个电子，当电子从原子中消失时这种电子的自由移动就形成了电流。 电是大自然中最基本的一部分，也是我们最广泛使用能量的一种形式。一次能源，如煤、天然气、油、核能以及其它自然能源，转变后可以产生电，一种二次能源，许多城镇是依着瀑布（一次机械能）而建立的，这些瀑布可以带动水轮进行工作。大约100年前，人类还没有开始发电，家庭照明用的是煤油灯，食物放在冰盒里冷却，房屋取暖靠的是烧柴或燃煤灶，自本杰明.富兰克林于一个雷电交加的晚上在费城做风筝试验之后，电的原理渐被人知。1800年中期，托马斯.爱迪生改变了每一个人的
9、生活他完成了他的发明电灯泡。1879年之前，用电仅限于户外照明的电弧灯，爱迪生的发明将照明带给我们每一个家庭。关键字：质子 中子 电子3 长难句分析及专业词汇a)、When the balancing force between protons and electrons is upset by an outside force, an atom may gain or lose an electron. When electrons are lost from an atom, the free movement of these electrons constitutes an elect
10、ric current.“electric current”:电流。这两句话具有因果关系，应加以联系，在加以进行翻译：当外力使质子和电子之间的平衡力遭到破坏时，原子就会增加或减少一个电子，当电子从原子中消失时这种电子的自由移动就形成了电流。4 中心思想 讲述什么是电，介绍电流的形成、电能的产生。5 列出文献景志华，孙石 实用电力英语丛书发电分册 中国电力出版社 2004年 325页Page13.Generators and Motors(发电机和电动机)1 English textFrom reference 1An electric generator is a device used to
11、 convert mechanical energy into electrical energy. The operation of generator is based on the principle of “electromagnetic induction” moving the wire through the magnetic field causes electric current to flow in the wire. Large generators are used by electrical utilities to generate the power to th
12、e mains power grid. When you need power on places where normal electrical distribution grids do not reach, motor powered generators are convenient sources of mains power. The generator itself in those motor powered generators is rotated by a suitable motor (usually diesel motor).When selecting a gen
13、erator, go for a generator with a rating higher than you need, so that you dont run it at full load (not good for fuel efficiency),or risk tripping the thing out or stalling it(motor generators can not generally take much overload).The power factor needs to be taken into account when driving inducti
14、ve loads (be sure you have enough watts and Vas).Generally take the total KW load of the load, add at least 20%30% as safety margin, When selecting generator you will need to know roughly how many hours per day the generator will be running, and rough load estimates of those hours, When renting a ge
15、nerator, tell the rental company those numbers, and ask them for their recommendations, Power (KW) ratings of an AC generator are based on the ability of the prime mover to overcome generator losses and the ability of the machine to dissipate the internally generated heat. Typical name plate data for an AC generator includes: manufacturer name, serial number of phases, and maximum temperature output voltage, armature and field current per phase; and maximum temperature rise. Generators are perfectly safe provi
