Generators Ppt

7/24/2019 Generators Ppt

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Introduction toGenerators

Lecture # 29-32

Mujahid Mehdi Abro IndusUniversity


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Introduction to Generators

The device which converts mechanicalenergy to electrical energy is called

generator

GENERATOR

ELECTRICAL ENERGYMEHANICAL ENERGY


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rinci!le o" #or$ing%

In generators mechanical energy istrans"ormed into electrical energy&

The !rinci!le o" all o" the generators issame' although the detail o"construction may (e di)er somewhat&

A generator has two main !arts% Coil

Magnet


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#or$ing%

Generator wor$s on*araday+s law o"electromagnetic

induction& #hen coil isrotated in a magnetic,eld (y somemechanical meansmagnetic -u. ischanged through thecoil and conse/uently

EM* is induced in the


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Classi,cation o" Generators%Generators are classi,ed in various ways'

li$e %

According to wor$ing%

Electrostatic generators

Electromagnetic generators According to out0!ut%

Ac generators

1C generators

According to mechanical wor$ in0!ut%

Engine generators'

Human !owered generators'

Tur(ine generator'#ind mill enerators


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Electrostatic Generators%

2e"ore the connection(etween electricityand magnetism was

discoveredElectrostaticgenerators were

invented& They were never used

"or commercial !ower

generation and were


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rinci!le o" electromagnetic

induction% The scienti,c !rinci!le on which modern

generators wor$ was discovered (y

Michel *araday' he gave ,rst electricaldemonstration o" electromagneticinduction in august 4564&

Then he created world+s ,rst electricalgenerator caller 7*araday+s dis$8


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9tand(y Generators% These are large' o"ten

!ermanent units o"tenstationed outside a(uilding and li$e to

!rovide (ac$u! !owerin case the inelectricity switches

o)& They can sense when

a !ower interru!tionhas occurred andautomaticall start to


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orta(le Generators%

These generators aredesigned to (etrans!orted whether on

cart trailer or (y handwhere there is no utilityo" !ower&

They are ca!a(le o"!roviding u! to 4:::$ilowatts o" !ower&

They use either diesel


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Commercial Generators%

In areas where!ower su!!ly isintermittent orlac$ing as in THIR1#;RL1 !rovincialareas' generators

can also (e set u! to!rovide additional!ower&


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Generators Ppt

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