Т.Ю.Кущ, М.С.ВоловникАнглийский язык для судовых электромехаников. ENGLISH FOR MARINE ELECTRICAL ENGINEERS. 1986

Eric: Er . . . well, not quite. I’m too old for that. Now I want the computer to work for me and so does my father. I mean to say he wants the com* puter to do all the housework for him. You see he may not like his pub acquaintances to see he’s under his wife’s thumb... Now I’ve just got a job in the Intelligence Department as an expert on ciphers and codes and I am expected to solve the most ingenious intricacies of the most complicated systems ever made by man.

Alf: But suppose the electronic computer goes wrong, what' then?

Eric: It doesn’t matter. Most of the messages are written in either a single code or a double code system.

Alf: What’s the difference?

Eric: When the single code system is used the message is understood by the chap who sends it but isn’t understood by the chap who receives it. Now, in the case of a double code the message isn’t understood either by the chap who sends it or the one who receives it.

Alf: Then what’s the computer for?!

Eric: Er . .. well, you see, my good fellow, they all think I’m an ass, and I am not surprised for 1 look rather silly. Now, if they didn’t hear the rattle of the electronic computer once in a while I might lose my job.. . Alf: I can see there’s' a lot to be seen, more to be heard, and plenty to imagine! I have never thought much of electronics, but now I begin to think it’s the science of the future.

Eric: Precisely.

42

20

Home exercise. Give a written account of the text.

A-C Electric Equipment of Ship’s Deck Machinery. Introduction

Modern electric equipment of ship’s deck machinery comprises electric motors and electric apparatuses of specially developed series and individual designs.

The fact that this machinery has to operate on weather decks predetermines special environmental conditions of the electric equipment: ambient temperatures ranging from —40 to +50° C, high humidity up to due fall with frequent cyclic variations, pitching and rolling, strong vibration, periodic splashing with sea water, high dynamic overloads and a large number of on-load startings.

The electric equipment of deck machinery meeting all specific requirements of marine service is noted for a high electrical strength and mechanical robustness. With regular maintenance and timely replacement of worn parts the service life of the electric equipment is as long as 15—20 years.

Utilized construction of the electric equipment used in deck machinery makes it possible to provide for any operating conditions in the course of its service.

To improve its reliability and efficiency the electric equipment is being constantly developed through the use of new structural materials and new switching and control systems and through a detailed study and overall improvement of the interaction between the electric drives of the deck machinery and other ship’s equipment.

Hometask: Ex. 41, 42.

Key

6 —behikno; 7— abcfgjmnqrvwy a' b' d'; 9 — 2, 5, 6; 11 — 1 acfh, 2 bdgi; 12 — 1 bchi, 2 adeg; 13 — 1. Мы, старики, стараемся понять, почему мы не можем оценить новое искусство.

2. Было очевидно, что он не мог составить мнение о ней, не мог раскусить ее. 3. К примеру, возьмем меня. Я говорю о себе, потому что, в конце концов, о себе я знаю больше всего.

4. Результат математически выражен дробью. 5. Эта песенка один из самых популярных номеров в наши дни. 6. Должен сказать вам, что часы его сочтены. Нужно заменить его как можно скорее. 17— 1, 2, 5, 7; 18— 1, определение; 2. обстоятельство; 3. причастный оборот с предлогом with выражает обстоятельство; 4. причастный оборот с предлогом with в функции определения; 21 — 3. В таблице приведены технические данные типовых комплектов электрооборудования; 26 — current transformer; 30—lb, 2h, 3e, 4a, 5c, 6g, 7f, 8d; 37 — la, 2c, 3b.

section з (3+1+3)

Automatic Voltage Regulators

The first class period

Review of “Synchronous up/down Counters”. 12

Topical content: Automatic voltage regulators (AVR). v10

Grammar item: Infinitive Constructions.

Text

Automatic Voltage Regulators

of the following parts: voltage measuring circuit, amplifier, frequency measuring circuit, synchronizing and triggering circuit, stabilized power supply.

11

8

J

Fig. 5. Automaic voltage regulator. Block diagram: 1 — ciirrent transformer; 2 — fuses; 3 — excitation switch; 4 — AVR unit; 5 — voltage adjuster; 6 — voltage build-up circuit; 7 — thyristor bridge; 8 — compounding transformer; 9 ■—rotating diode bridge; 10 — compounding circuit; 11 — supply transformer

All the above mentioned circuits are mounted on a printed board.

8. The alternator voltage is transformed before it is fed to the printed circuit board via terminals. The voltage is rectified and a proportional voltage is fed to an operational amplifier where it is compared to the reference voltage. The difference voltage is amplified and controls, via a triggering circuit, the firing angle of the thyristors and thereby the exciter current.

9. In case of alternator voltage change, the regulator generates a signal which changes the firing angle of the thyristors until the desired voltage is obtained. A stabilizing filter ensures stable and alternator voltage.

Exercises

1

6

Read the text and write out names of the AVR circuits parts.

2

6

Looking through the text find and read the passages containing the information:

а) о принципе работы регулятора;

б) о заданном и разностном напряжениях;

в) о работе регулятора в случае изменения напряжения генератора переменного тока;

г) о работе цепи измерения частоты.

Read the text paying attention to Gerund.

4 6

Repeat the words after the teacher. Then read them by yourself paying attention to their Russian equivalents.

power factor block diagram

autonomous alternator system

is fed to the AVR unit fuse