Презентация, доклад к учебному занятию по английскому языку по теме Transformers

Презентация к учебному занятию по английскому языку по теме Transformers, предмет презентации: Английский язык. Этот материал в формате pptx (PowerPoint) содержит 30 слайдов, для просмотра воспользуйтесь проигрывателем. Презентацию на заданную тему можно скачать внизу страницы, поделившись ссылкой в социальных сетях!

Слайды и текст этой презентации

Слайд 1
Текст слайда:

The Topic: Electrical Machines

The most prime governing thing that holds for the existence of mankind and the universe and beyond is Energy. From the dark ages, Humans have been trying to develop means and methods to produce energy and then to transform it into another usable form. Even today, our lives are based on Energy. Energy today is now available in many forms for different uses. The most significant type of Energy that has affected our lives in a huge way is the electrical energy. Just turn around your face and you will see electrical devices everywhere around you. Electricity or the popular name for electrical energy as we call it has transformed our lives in a significant way; it has made our lives quite easy and comfortable. 

HOW IS ELECTRICITY PRODUCED?
Electricity (the inevitable thing) is produced by different types of Electric Machines and that too in different forms. The electricity that reaches our home is not a novice task; many genius minds and lots of complex and bulky electric machines are involved behind it. Then an electric machine is not only used for generation purpose it can also be used as a source of mechanical energy that is motor may it be a juicer mixer in your kitchen or the conveyer belt system in large manufacturing plants. So in the next section we will try to explain briefly about basic principle of electric machines and their types.


Слайд 2
Текст слайда:

The Topic: Electrical Machines

What is an electrical machine?
What are their principles of operation, construction?
What are they used for?
What are their types?


Слайд 3
Текст слайда:

What is an electrical machine?

An electrical machine converts energy from one category into another. Thereby at least one energy category
features as electric power.

An electrical machine is an energy converter in which two electric circuits have been coupled by means of a magnetic circuit.

They all comprise two electric circuits which have been coupled through a magnetic circuit.


Слайд 4
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Going through the basic fundamentals about principle, construction and operation of electric machines

Figure: Tasks of electrical machines in power flow


Слайд 5
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What are the principals of operation of electrical machines?

Magnetic fields are the fundamental mechanism by which energy is converted from one form to another in motors, generators and transformers.
Two related physical principles underline the operation of generators and motors.







The electromagnetic induction

The electromagnetic reaction

discovered by Michael Faraday
in 1831

If a conductor is moved through a magnetic field, or if the strength of a stationary conducting loop is made to vary, a current is set up or induced in the conductor.

If a current is passed through a conductor located in a magnetic field, the field exerts a mechanical force on it.

discovered by André’ Ampere
in 1820


Слайд 6
Текст слайда:

Functional block diagram of electromechanical energy conversion devices as (A) motor, and (B) generator


Слайд 7
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Vocabulary:

feature – особенность, характерная черта
converter – преобразователь, конвертер
commutator – коллектор
armature – якорь
to suggest – предлагать, предложить
ring – кольцо, фланец, хомут
bar – полоса (металла)
to pull – тянуть, притягивать
to switch – включать, выключать, переключать
drive – передача, привод
design – конструкция, чертёж, план,
to power – снабжать энергией,
to differ – различаться, отличаться
to rotate – 1. вращаться; 2. чередоваться
to create – творить, создавать



Слайд 8
Текст слайда:

Motors and generators’ structure


Слайд 9
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A simple electromagnet consisting of a coil of insulated wire wrapped around an iron core

The Armature  from a small DC fan motor


Слайд 10
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Electrical Machines











Bearers of electric circuits to one another

rigid

flexible

Stationary electrical machines

Rotating electrical machines

synchronous

asynchronous

commutators

transformers

DC Machines

Single-phase

Three-phase


Слайд 11
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What are these?


Слайд 12
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The subject: Transformers

Lesson Tasks:
To check up our homework;

To get information about transformers;
to find out what is a transformer;
to learn about it’s construction;
to know about the types of transformers;




Слайд 13
Текст слайда:

Warming-up


Слайд 14
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Checking-up the h/w / Giving marks


Слайд 15
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Checking-up the Home work / Keys


Слайд 16
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Checking-up the h/w / Giving marks


Слайд 17
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Text working “Transformers”

Vocabulary:



Слайд 18
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Transformers’ Types

What types of transformers are described in the text?


Слайд 19
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What is the work principle of a step-up transformer ?


Слайд 20
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What is the work principle of a step-down transformer ?


Слайд 21
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What is the work principle of an air-core transformer ?


Слайд 22
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What is the work principle of an iron-core transformer ?


Слайд 23
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The subject: Transformers

Lesson Tasks:
To check up our homework;

To get information about transformers;
to find out what is a transformer;
to learn about it’s construction;
to know about the types of transformers;




Слайд 24
Текст слайда:

Transformers’ Application

1. Distribution transformers are generally used in power distribution and transmission systems.
2. Power transformers are used in electronic circuits and come in many different types and applications.
3. Control transformers are generally used in circuits that require constant voltage or constant current with a low power or volt-amp rating.
4. Auto transformers are generally used in low power applications where a variable voltage is required.
5. Isolation transformers are normally low power transformers used to isolate noise from or to ground electronic circuits.
6. Instrument potential and instrument current transformers are used for operation of instruments such as ammeters, voltmeters, watt meters, and relays used for various protective purposes.


Слайд 25
Текст слайда:

Transformers’ Application


Слайд 26
Текст слайда:

Complex Object

The Subject

The Predicate

The Object (a Noun or a Pronoun in an Object case)

The Infinitive
(with or
without to)

The Rest Part of the Sentence

Complex Object

We

consider

a transformer

to be

an electrical machine.

She

wants

him

to study

English .


Слайд 27
Текст слайда:

Complex Object

После глаголов: желания
(wish, want, like, would like), предположения (expect, seem, consider, appear, suppose, believe), сообщения/информации (know, think, claim, report, declare, show, find)

После глаголов  физическое восприятия и ощущения 
(notice, see, watch, hear, listen to, observe, feel, ),
а также make и let

The Subject

The Object (a Noun or
a Pronoun
in an Object case)

to +
The Infinitive

The Infinitive

The Object (a Noun or
a Pronoun
in an Object case)


Слайд 28
Текст слайда:

Complex Subject

The Subject

The Predicate

The Infinitive

The Rest Part of the Sentence

Complex Subject

The current

Is known

to consist

of moving electrons.

She

Is supposed

to work

at this plant.


Слайд 29
Текст слайда:

Complex Subject

Сказуемое-глагол в пассивном залоге: to say, to report, to announce, to believe, to suppose, to think, to state, to expect, to know, to consider, to see, to hear

Сказуемое в активном залоге: to seem, to appear, to prove, to turn out, to happen, to chance.

3) Сказуемое-глагол to be в выражениях:
to be likely, to be unlikely, to be certain, to be sure

The Subject

to +
The Infinitive


Слайд 30
Текст слайда:

Complex Object / Complex Subject

We

suppose

him

at this plant.

Complex Subject

He

Is supposed

to work

at this plant.

to work

Complex Object


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