An Auto Transformer is a transformer with only one winding wound on a laminated core. An auto transformer is similar to a two winding transformer but differ in the way the primary and secondary winding are interrelated. A part of the winding is common to both primary and secondary sides.
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This presentation explains in brief about the auto-transformers, their concept, math and applications.
An Auto Transformer is a transformer with only one winding wound on a laminated core. An auto transformer is similar to a two winding transformer but differ in the way the primary and secondary winding are interrelated. A part of the winding is common to both primary and secondary sides.
Thank you very much for checking out my presentation.
If you are a student or a faculty of an engineering college and need to create a presentation, you can contact me. Check out my profile to know how.
This presentation explains in brief about the auto-transformers, their concept, math and applications.
TYPES OF TRANSFORMER ,COMPARISON BETWEEN CORE AND SHELL |DAY4||IN HINDI|BASIC...Prasant Kumar
#TYPES_OF_TRANSFORMER
#COMPARISON_CORE_SHELL_TYPE_TRANSFORMER
#CLASSIFICATION_OF_TRANSFORMER
#COMPARISON BETWEEN CORE AND SHELL TYPE TRANSFORMER
#CORE TYPE TRANSFORMER
#SHELL TYPE TRANSFORMER
#BASIC ELECTRICAL ENGINEERING
#SINGLE PHASE TRANSFORMER
#Topic - ELECTRICAL TRANSFORMER
~ Link of all sessions are.
DAY 1 (Need/Definition)
https://youtu.be/BvaykFJ_NoE
DAY 2 (Working principle and Construction)
https://youtu.be/06rgxocihaM
DAY 3 (EMF equation and Turns Ratio)
https://youtu.be/g7e5xBPmv3Y
DAY 4 (Classification of Transformer)
https://youtu.be/6NP5L4MlvY4
This Presentation Of Classes Of Amplifiers which is based on class a b ab and c amplifier by Arsalan Qureshi student of Dawood University Roll no: D-16-TE-09.
It is based on current transformer description
It's working and applications are present in it ,it also includes videos of it's windings and it's inrush ability of transformer, and also about instrument transformer and it's working with applications.Current transformers are used-in measuring high currents and connected with it in parallel to it
Transformer-History,Type And More DetailAdeel Rasheed
On these Slides I describe History, Introduction, Construction, Working and Principle, Types of Transformer, Ideal Transformer and Uses of Transformer.
Description of Auto-Transformer working principle,Constructional features of Auto transformer,Advantages of Auto transformer,Inductional law in Auto transformer,copper saving advantage in Auto transformer,Types of Auto transformer,Conversion of two-winding transformet to Auto transformer,Disadvantages of Auto transformer,Applications of Auto transformer,Limitations of Auto transformer.
TYPES OF TRANSFORMER ,COMPARISON BETWEEN CORE AND SHELL |DAY4||IN HINDI|BASIC...Prasant Kumar
#TYPES_OF_TRANSFORMER
#COMPARISON_CORE_SHELL_TYPE_TRANSFORMER
#CLASSIFICATION_OF_TRANSFORMER
#COMPARISON BETWEEN CORE AND SHELL TYPE TRANSFORMER
#CORE TYPE TRANSFORMER
#SHELL TYPE TRANSFORMER
#BASIC ELECTRICAL ENGINEERING
#SINGLE PHASE TRANSFORMER
#Topic - ELECTRICAL TRANSFORMER
~ Link of all sessions are.
DAY 1 (Need/Definition)
https://youtu.be/BvaykFJ_NoE
DAY 2 (Working principle and Construction)
https://youtu.be/06rgxocihaM
DAY 3 (EMF equation and Turns Ratio)
https://youtu.be/g7e5xBPmv3Y
DAY 4 (Classification of Transformer)
https://youtu.be/6NP5L4MlvY4
This Presentation Of Classes Of Amplifiers which is based on class a b ab and c amplifier by Arsalan Qureshi student of Dawood University Roll no: D-16-TE-09.
It is based on current transformer description
It's working and applications are present in it ,it also includes videos of it's windings and it's inrush ability of transformer, and also about instrument transformer and it's working with applications.Current transformers are used-in measuring high currents and connected with it in parallel to it
Transformer-History,Type And More DetailAdeel Rasheed
On these Slides I describe History, Introduction, Construction, Working and Principle, Types of Transformer, Ideal Transformer and Uses of Transformer.
Description of Auto-Transformer working principle,Constructional features of Auto transformer,Advantages of Auto transformer,Inductional law in Auto transformer,copper saving advantage in Auto transformer,Types of Auto transformer,Conversion of two-winding transformet to Auto transformer,Disadvantages of Auto transformer,Applications of Auto transformer,Limitations of Auto transformer.
CT, PT And CVT
It help in measurement of high voltage And current.
* It provide low voltage and current to the electrical device.
* It’s measure application is in the protection system where relay is work on low amount of voltage and current.
physics non working investigatory project tranformerakashgauravr
investigatory project work physics for transformer 100%non working and ensurance of gettin ful marks in practicle in investigatory projesct ,hopeful u enjoy....
Class 12 Investigatory project, Presentation, Class 12 Physics Project presentation, Class 12 physics Project,CBSE Class 12 physics project, Transformers
Step-down transformer Physics project Class 12 CBSE FinalMuhammad Jassim
FULL MARK WITH THIS. EASY NO WORY. QUESTIONS FOR VIVA WILL ALSO BE EASY SINCE THE PROJECT IS EASY.
Step-down transformer Physics project Class 12 CBSE Final
An autotransformer is
an electrical transformer
with only one winding.
In an autotransformer portion
of the same winding act as
both primary and secondary
sides of the transformer.
CT and PT Instrument transformer | basic information with some most asked que...AkhileshDeshmukh5
This ppt contains all basic information about instrument transformer le CT and PT which is explained in baase manner. In this ppt, you will also get to learn about questions which are asked in the interview about CT and PT.
Industrial Training at Shahjalal Fertilizer Company Limited (SFCL)MdTanvirMahtab2
This presentation is about the working procedure of Shahjalal Fertilizer Company Limited (SFCL). A Govt. owned Company of Bangladesh Chemical Industries Corporation under Ministry of Industries.
Student information management system project report ii.pdfKamal Acharya
Our project explains about the student management. This project mainly explains the various actions related to student details. This project shows some ease in adding, editing and deleting the student details. It also provides a less time consuming process for viewing, adding, editing and deleting the marks of the students.
Sachpazis:Terzaghi Bearing Capacity Estimation in simple terms with Calculati...Dr.Costas Sachpazis
Terzaghi's soil bearing capacity theory, developed by Karl Terzaghi, is a fundamental principle in geotechnical engineering used to determine the bearing capacity of shallow foundations. This theory provides a method to calculate the ultimate bearing capacity of soil, which is the maximum load per unit area that the soil can support without undergoing shear failure. The Calculation HTML Code included.
Saudi Arabia stands as a titan in the global energy landscape, renowned for its abundant oil and gas resources. It's the largest exporter of petroleum and holds some of the world's most significant reserves. Let's delve into the top 10 oil and gas projects shaping Saudi Arabia's energy future in 2024.
Welcome to WIPAC Monthly the magazine brought to you by the LinkedIn Group Water Industry Process Automation & Control.
In this month's edition, along with this month's industry news to celebrate the 13 years since the group was created we have articles including
A case study of the used of Advanced Process Control at the Wastewater Treatment works at Lleida in Spain
A look back on an article on smart wastewater networks in order to see how the industry has measured up in the interim around the adoption of Digital Transformation in the Water Industry.
About
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
Technical Specifications
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
Key Features
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface
• Compatible with MAFI CCR system
• Copatiable with IDM8000 CCR
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
Application
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
Cosmetic shop management system project report.pdfKamal Acharya
Buying new cosmetic products is difficult. It can even be scary for those who have sensitive skin and are prone to skin trouble. The information needed to alleviate this problem is on the back of each product, but it's thought to interpret those ingredient lists unless you have a background in chemistry.
Instead of buying and hoping for the best, we can use data science to help us predict which products may be good fits for us. It includes various function programs to do the above mentioned tasks.
Data file handling has been effectively used in the program.
The automated cosmetic shop management system should deal with the automation of general workflow and administration process of the shop. The main processes of the system focus on customer's request where the system is able to search the most appropriate products and deliver it to the customers. It should help the employees to quickly identify the list of cosmetic product that have reached the minimum quantity and also keep a track of expired date for each cosmetic product. It should help the employees to find the rack number in which the product is placed.It is also Faster and more efficient way.
2. What is Transformer ??What is Transformer ??
A transformer is aA transformer is a
static device which isstatic device which is
use to convert highuse to convert high
alternatic voltage toalternatic voltage to
a low alternatica low alternatic
voltage and vicevoltage and vice
versa, keeping theversa, keeping the
frequency same.frequency same.
3. Principle Of OperationPrinciple Of Operation
Transformer works on theTransformer works on the
principle of mutualprinciple of mutual
induction of two coils.induction of two coils.
When current in theWhen current in the
primary coil is changed theprimary coil is changed the
flux linked to the secondaryflux linked to the secondary
coil also changes.coil also changes.
Consequently an EMF isConsequently an EMF is
induced in the secondaryinduced in the secondary
coil.coil.
4. What is Induction law ??What is Induction law ??
Faraday’s law states that:Faraday’s law states that:
Vs=Ns.dVs=Ns.dΦΦ/dt/dt
wherewhere VSVS is the instantaneous secondryis the instantaneous secondry
winding voltage.winding voltage.
NSNS is the number of turns in the secondaryis the number of turns in the secondary
coil.coil.
5. Construction of TransformerConstruction of Transformer
Mainly Transformers haveMainly Transformers have
two types oftwo types of
construction….construction….
CORE typeCORE type
constructionconstruction
SHELL typeSHELL type
constructionconstruction
6. A wide variety of transformer designs are usedA wide variety of transformer designs are used
for different applications.for different applications.
Auto-transformer
Poly-phase transformerPoly-phase transformer
Leakage transformerLeakage transformer
Resonant transformerResonant transformer
Instrument transformersInstrument transformers
China autotransformer
7. AUTO-TRANSFORMERSAUTO-TRANSFORMERS
AnAn autotransformerautotransformer
(sometimes called(sometimes called autoauto
step downstep down
transformertransformer)is an)is an
electricalelectrical transformertransformer
with only onewith only one windingwinding..
The "The "autoauto" (Greek for" (Greek for
"self") prefix refers to"self") prefix refers to
the single coil acting onthe single coil acting on
itself and not to anyitself and not to any
kind ofkind of automaticautomatic
mechanismmechanism..
8. N1=primary turn(1-3)N1=primary turn(1-3)
N2=secondary turn(2-3)N2=secondary turn(2-3)
I1=primary currentI1=primary current
I2=secondary currentI2=secondary current
V1=primary voltageV1=primary voltage
V2=secondary votageV2=secondary votage
Theory of AutotransformerTheory of Autotransformer
From the above fig. We get
9. (I/P=O/P)
OUT PUT
The primary and secondary windings of an
autotransformer are
Connected magnetically as well as electrically.
So the power transferred primary to secondary
inductively as well as conductively.
10. Copper saving in Auto transformerCopper saving in Auto transformer
The same output and voltageThe same output and voltage
transformation ratio antransformation ratio an
autotransformer requires less copperautotransformer requires less copper
than the 2-winding transformerthan the 2-winding transformer
11.
12. Types of AUTOTransformerTypes of AUTOTransformer
Step UP TransformerStep UP Transformer ::
A transformer inA transformer in
which Ns>Np iswhich Ns>Np is
called a step upcalled a step up
transformer. A steptransformer. A step
up transformer is aup transformer is a
transformer whichtransformer which
converts lowconverts low
alternatic voltage toalternatic voltage to
high alternatichigh alternatic
voltagevoltage..
13. Step DOWNTransformerStep DOWNTransformer ::
A transformer in whichA transformer in which
Np>Ns is called a stepNp>Ns is called a step
down transformer. A stepdown transformer. A step
down transformer is adown transformer is a
transformer whichtransformer which
converts high alternatingconverts high alternating
voltage to low alternatingvoltage to low alternating
voltage.voltage.
15. In this case common current flow towards theIn this case common current flow towards the
common terminalcommon terminal
ADDITIVE POLARITYADDITIVE POLARITY
17. In this case common current flow awayIn this case common current flow away
from common terminalfrom common terminal
18. AdvantagesAdvantages
An autotransformer requires less Cu than a two-An autotransformer requires less Cu than a two-
winding transformer of similar rating.winding transformer of similar rating.
An autotransformer operates at a higher efficiencyAn autotransformer operates at a higher efficiency
than a two-winding transformer of similar rating.than a two-winding transformer of similar rating.
An autotransformer has better voltage regulationAn autotransformer has better voltage regulation
than a two-windingtransformer of the same rating.than a two-windingtransformer of the same rating.
An autotransformer has smaller size than a two-An autotransformer has smaller size than a two-
winding transformer of the same rating.winding transformer of the same rating.
An autotransformer requires smaller excitingAn autotransformer requires smaller exciting
current than a two-windingtransformer of the samecurrent than a two-windingtransformer of the same
rating.rating.
19. DISADVANTAGES
There is a direct connection between theThere is a direct connection between the
primary and secondary. Therefore, the outputprimary and secondary. Therefore, the output
is no longer d.c. isolated from the input.is no longer d.c. isolated from the input.
An autotransformer is not safe for steppingAn autotransformer is not safe for stepping
down a high voltage to a low voltage. As andown a high voltage to a low voltage. As an
illustration.illustration.
20. If an open circuit develops in the common portionIf an open circuit develops in the common portion
of the winding, then full-primary voltage willof the winding, then full-primary voltage will
appear across the load. In such a case, any oneappear across the load. In such a case, any one
coming in contact with the secondary is subjectedcoming in contact with the secondary is subjected
to high voltage. This could be dangerous to bothto high voltage. This could be dangerous to both
the persons and equipment. For this reason,the persons and equipment. For this reason,
autotransformers are prohibited for general use.autotransformers are prohibited for general use.
The short-circuit current is much larger than for theThe short-circuit current is much larger than for the
two-winding transformer of the same rating. Sotwo-winding transformer of the same rating. So
that a short-circuited secondary causes part of thethat a short-circuited secondary causes part of the
primary also to be short-circuited. This reduces theprimary also to be short-circuited. This reduces the
effective resistance and reactance.effective resistance and reactance.
21. APPLICATIONAPPLICATION
Autotransformers are used to compensate forAutotransformers are used to compensate for
voltage drops in transmission andvoltage drops in transmission and
distribution lines. When used for thisdistribution lines. When used for this
purpose, they are known as boosterpurpose, they are known as booster
transformers.transformers.
Autotransformers are used for reducing theAutotransformers are used for reducing the
voltage supplied to a.c.motors during thevoltage supplied to a.c.motors during the
starting period.starting period.
Autotransformers are used for continuouslyAutotransformers are used for continuously
variable supply.variable supply.
22. On long rural power distribution lines,On long rural power distribution lines,
special autotransformers with automatic tap-special autotransformers with automatic tap-
changing equipment are inserted as voltagechanging equipment are inserted as voltage
regulators, so that customers at the far endregulators, so that customers at the far end
of the line receive the same average voltageof the line receive the same average voltage
as those closer to the source. The variableas those closer to the source. The variable
ratio of the autotransformer compensates forratio of the autotransformer compensates for
thethe voltage dropvoltage drop along the line.along the line.
In control equipment for 1-phase and 3-In control equipment for 1-phase and 3-
phase electrical locomotives.phase electrical locomotives.
23. LIMITATIONLIMITATION
Because it requires both fewer windings and a smaller core,Because it requires both fewer windings and a smaller core,
an autotransformer for power applications is typicallyan autotransformer for power applications is typically
lighter and less costly than a two-winding transformer, uplighter and less costly than a two-winding transformer, up
to a voltage ratio of about 3:1; beyond that range, a two-to a voltage ratio of about 3:1; beyond that range, a two-
winding transformer is usually more economical.winding transformer is usually more economical.
Like multiple-winding transformers, autotransformersLike multiple-winding transformers, autotransformers
operate on time-varyingoperate on time-varying magnetic fieldsmagnetic fields and so will notand so will not
function with DC.function with DC.
A failure of the insulation of the windings of anA failure of the insulation of the windings of an
autotransformer can result in full inputautotransformer can result in full input voltagevoltage applied toapplied to
the output. Also, a break in the part of the winding that isthe output. Also, a break in the part of the winding that is
used as both primary and secondary will result in theused as both primary and secondary will result in the
transformer acting as an inductor in series with the load .transformer acting as an inductor in series with the load .
24. CONCLUSION
TO ABOVE STUDY WE CONCLUDE THAT
AUTOTRANSFORMER HAVE LESS AMOUNT
OF CU. LOSS REQUIRED.HIGH
EFFICIENCY,POSSIBLE TO GET SMOOTH
AND CONTINUOES VARIATION VOLTAGE.
25. REFARENCEREFARENCE
PRICIPLES OF ELECTRICALPRICIPLES OF ELECTRICAL
MACHINE(V.KMEHETA ,ROHITMACHINE(V.KMEHETA ,ROHIT
MEHETA)MEHETA)
ELECTRICAL TOCNOLOGY(VOI-2)ELECTRICAL TOCNOLOGY(VOI-2)
(B.L THERAJA,A.K THERAJA)(B.L THERAJA,A.K THERAJA)
www.scribd.comwww.scribd.com
My.safaribooksonline.comMy.safaribooksonline.com
Autotransformer WikipediaAutotransformer Wikipedia
26.
27. CautionCaution
Transformer must not be connected to a direct source. If theTransformer must not be connected to a direct source. If the
primary winding of a transformer is connected to a dc supplyprimary winding of a transformer is connected to a dc supply
mains, the flux produced will not vary but remain constant inmains, the flux produced will not vary but remain constant in
magnitude and therefore no emf will be induced in themagnitude and therefore no emf will be induced in the
secondary winding except at the moment of switching on.secondary winding except at the moment of switching on.
Thus the transformer can not be employed for raising orThus the transformer can not be employed for raising or
lowering the dc voltage. Also there will be no back inducedlowering the dc voltage. Also there will be no back induced
emf in the primary winding and therefore a heavy currentemf in the primary winding and therefore a heavy current
will be drawn from the supply mains which may result in thewill be drawn from the supply mains which may result in the
burning out of the winding.burning out of the winding.