電氣工程及其自動化專業(yè)英語復(fù)習(xí)資料

1、-. z.1.目前，煤仍然是凝汽式電廠最長用的能源。At present coal is the most mon food of a steam power plant.2.為防止人畜觸電，高壓電一般采用架空線輸送。High voltage current is usually carried by overhead wire system so as to prevent living things being electrocuted.3.這座由電子計算機控制的核電站將向全市供電。This nuclear power plant which is puter-controlled wil

2、l serve the entire city.4.電學(xué)與電子學(xué)實際上是唯一難以分開的，二者相互滲透，相互聯(lián)系。Electricity and electronics are really indivisible, each forming part of the other.5.元件技術(shù)中起主要作用的是半導(dǎo)體元件。The major contributors in ponent technology have been in the sosemiconductor ponents.6.電壓，電流和電阻這三個因素是相互關(guān)聯(lián)的。The factors, voltage, current and

3、resistance , are related to each other .7.電動機與發(fā)電機就是以磁和電這二者之間的關(guān)系為根底的Based upon the relationship between magnetism and electricity are motors and generators8，隨著電氣工程學(xué)的開展，電力能被輸送到非常遙遠的地方去。With the development of electrical engineering , power can be transmitted over long distance.9每時每刻，能量都在由一種形式變成另一種形式。E

4、very moment of every day, energy is being transformed from one form into another.10.只要知道電壓和電流，就能測定電阻。The resistance can be determined provided that the voltage and current are known.11.已經(jīng)證明，能量是不可能消滅的，只能轉(zhuǎn)換成其他形式。It has been proved that energy cant be destroyed , it can only be changed into other forms

5、.12?？梢姶判圆牧蠌V泛用于現(xiàn)在電子設(shè)備中。It can be seen that magnetic materials are used in a wide range of modern electronic equipment.13.在熱電廠燃燒的化學(xué)能并未全部轉(zhuǎn)變成熱能。In a thermal power plant , all the chemical energy of the fuel is not converted into heat .14.電流過導(dǎo)線就像水流過管子一樣。The flowing of electricity through a wire is not un

6、like that of water through a pipe.15.沒有檢查好儀表，切勿開場做實驗。Never start to do the e*periment before you have checked the meter-. z.16同性電荷相斥，異性電荷相吸-. z.Like charges repel each other while opposite charges attract。17開展經(jīng)濟必須注意環(huán)境保護Attention must be paid to environmental protection in developing economy18nothing

7、 in the world moves faster than light19自動化能幫助我們提高產(chǎn)量30%Automation will help us to raise the output of production by thirty percent20只要知道電壓、電流、就能測定電阻The resistance can be determined provided that the voltage and current are known1.(A temperature transducer ) is a device that a voltage or a current pro

8、portional to the actual temperature.2.when the speed of the rotor is zero,the ship of induction machine is (1.0).3.copper losses are(resistive) losses in the primary and secondary windings of the transformer core.4.residential and mercial customers are supplied by the secondary distribution feeders

9、of (220/380v).5.the frequency of a power system is determined mainly by (active power generation and consumption).1.many electrical signals derived from physical systems are obtained from devices called (transducers).2.the air-blast circuit breaker makes use the arc-quenching properties of (dry and

10、clean pressed air).3.in a puter,most processing take place in a puter called the (CPU).1.the difference between a potential transformer and a power transformer is that potential transformer is designed to handle only a very small current.電壓互感器與電力變壓器的區(qū)別在于電壓互感器被設(shè)計為只能處理很小的電流。1.可是盡管電壓表與電流表之間有這些類似之處，但還有假

11、設(shè)干重要的差異。However,in spite of all this similarity between a voltmeter and an ammeter there are also important difference.2.在電壓一樣的情況下，導(dǎo)線的電阻越大，流過的電流就越小。The greater the resistance of a wire,the less electric current will pass through it under the same pressure.3.利用發(fā)電機，可將機械能再轉(zhuǎn)變成電能。The mechanical energy ca

12、n be changed back into electrical energy by means of a generator.4、如果實用變壓器，低電壓的電力就能抓轉(zhuǎn)換成高電壓的電力Using a transformer ，power at low voltage can be transformed into power at high voltage1. It is conventional to take the current flow as the movement of (positive charges)2. Electric current is the time rate

13、 of charge, measured in (amperes).3. The energy required to move a unit charge through an element is (voltage).4. The plus (+) and minus (-) signs in an electric circuit diagram are used to define (voltage polarity).5. According to the passive sign convention, if the power has a plus sign, power is

14、(absorbed) by the element.1. An independent voltage source is a (two-terminal element), which maintains a specified voltage between its terminals.2. Resistors are (passive) elements.3. An ideal dependent source is an (active) element in which the source quantity is controlled by another voltage or c

15、urrent.4. There are (four) possible types of dependent sources.5. For a voltage source, its terminal voltage is known but its (current) must be determined by the e*ternal circuit connecting with it1. The voltage produced by a thermocouple pair is (an analog) signal.2. ON-OFF information can be repre

16、sented by (a digital) signal.3. A device that can convert an analog signal to the corresponding digital form is called (A/D)for short.4. The thermocouple pair converts temperature difference to a(voltage).5. A D/A is a device that can convert a digital signal to the equivalent (analog form).1. The p

17、rocess of quantizing the continuous values into a binary scale is called (analog-to-digital conversion).2. (A temperature transducer)is a device that produces a voltage or a current proportional to the actual temperature.3. The precision and the speed of an ADC are essentially (inpatible).4. The pre

18、cision of ADC is determined by (the number of binary bits).5. In Fig.2-4the amplifier performs (two) functions.1. The thumb is in the direction of (the relative motion of conductor)in Flemings right-hand rule.2. In induction motors the speed of the rotating rotor (never reaches)the speed of the rota

19、ting magnetic field.3. When the speed of the rotor is zero, the slip of induction machine is (1.0).4. Form-wound coils are widely used for (large AC) motors.4-4(P84)1. A transformer is a device that can converter one ac voltage to another ac voltage through the action of (a magnetic field).2. The pr

20、imary winding is connected to (the power source).3. The core construction consisting of a three-legged laminated core with the windings wrapped around the centre leg is called (shell form).4. The transformer that takes the distribution voltage and steps it down to the final voltage at which the powe

21、r is actually used is called a (distribution transformer).5. Copper losses are (resistive) losses in the primary and secondary windings of the transformer core.5-1(P89)1. A puter works automatically according to (a series of stored instructions)2. A keyboard or a mouse is (an input) device.3. The pu

22、ter network for a university is usually described as (a local area network).4. A puter that requests data from a server is called as (client).5. A hard disk is referred to as (a storage) device.5-4(P108)1. (A support module) can be used in conjunction with the main software program to provide an au*

23、iliary set instructions.2. A puters microprocessor only understands (machine language).3. Delphi belongs to (high-level programming language).4. An operating system is considered as (system software).5. (The file management system) allocates and manages secondary storage space and translates file re

24、quests from their name-based form into specific I/O requests.6-1(P118)1. The first plete power system was built in (1882), it was (a DC) power system.2. The first three-phase AC transmission line in North America was put into operation in (1893).3. Power system interconnections are usually formed at

25、 the (transmission system) level.4. In North American (60Hz) is adopted as standard frequency in electric power system.5. (The HVDC transmission) can provide an asynchronous link between two ac electric power systems with different nominal frequencies.6-2(P122)1. In power plants (prime movers) conve

26、rt the primary energy to mechanical energy, and (synchronous generators) convert mechanical energy to electric energy.2. The generator voltages are usually stepped up to the transmission voltage level by (step-up transformers)3. Residential and mercial customers are supplied by the secondary distrib

27、ution feeders at (220/380V).4. In USA, the voltages of the transmission system are typically (230kV and above)6-3(P130)1. The objective of the optimal economic operation of power systems is (to minimize the total production cost).2. The frequency of a power system is determined mainly by (active pow

28、er generation and consumption).3. The voltage levels at the terminals of generators are controlled mainly by (automatic voltage regulators).4. When the system frequency is changed away from the rating, (active power) must be regulated.5. Regulation of the generators speed governor can change its (ac

29、tive power) output.7-2(P148)1. At the fault point in electrical equipment, there may be (all of the above).2. Among the following faults on a transmission line, the most severe one is usually the (3-0 fault).3. Among the following faults on a transmission line, the most mon one is the (single line to ground fault).4. The most mon fault in the generators stator winding is (phase to ground fault).5. If generator overspeed occurs in a thermal power plant, the action most p