This document provides information on transformers. It begins with an introduction that explains transformers are used to transfer electrical energy between AC circuits by changing the voltage and current levels. It then discusses the basic components and principles of how transformers work, including that an alternating current in the primary winding induces a voltage in the secondary winding via electromagnetic induction without a direct electrical connection. The document also covers different types of transformers like step-up, step-down, variable and autotransformers as well as their functions and uses. It concludes by explaining how laminating the iron core reduces eddy current losses.
A transformer is a passive electrical device that transfers electrical energy from one electrical circuit to another, or multiple circuits. A varying current in any one coil of the transformer produces a varying magnetic flux in the transformer's core
A transformer is a passive electrical device that transfers electrical energy from one electrical circuit to another, or multiple circuits. A varying current in any one coil of the transformer produces a varying magnetic flux in the transformer's core
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.
Courier management system project report.pdfKamal Acharya
It is now-a-days very important for the people to send or receive articles like imported furniture, electronic items, gifts, business goods and the like. People depend vastly on different transport systems which mostly use the manual way of receiving and delivering the articles. There is no way to track the articles till they are received and there is no way to let the customer know what happened in transit, once he booked some articles. In such a situation, we need a system which completely computerizes the cargo activities including time to time tracking of the articles sent. This need is fulfilled by Courier Management System software which is online software for the cargo management people that enables them to receive the goods from a source and send them to a required destination and track their status from time to time.
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.
Immunizing Image Classifiers Against Localized Adversary Attacksgerogepatton
This paper addresses the vulnerability of deep learning models, particularly convolutional neural networks
(CNN)s, to adversarial attacks and presents a proactive training technique designed to counter them. We
introduce a novel volumization algorithm, which transforms 2D images into 3D volumetric representations.
When combined with 3D convolution and deep curriculum learning optimization (CLO), itsignificantly improves
the immunity of models against localized universal attacks by up to 40%. We evaluate our proposed approach
using contemporary CNN architectures and the modified Canadian Institute for Advanced Research (CIFAR-10
and CIFAR-100) and ImageNet Large Scale Visual Recognition Challenge (ILSVRC12) datasets, showcasing
accuracy improvements over previous techniques. The results indicate that the combination of the volumetric
input and curriculum learning holds significant promise for mitigating adversarial attacks without necessitating
adversary training.
TECHNICAL TRAINING MANUAL GENERAL FAMILIARIZATION COURSEDuvanRamosGarzon1
AIRCRAFT GENERAL
The Single Aisle is the most advanced family aircraft in service today, with fly-by-wire flight controls.
The A318, A319, A320 and A321 are twin-engine subsonic medium range aircraft.
The family offers a choice of engines
NO1 Uk best vashikaran specialist in delhi vashikaran baba near me online vas...Amil Baba Dawood bangali
Contact with Dawood Bhai Just call on +92322-6382012 and we'll help you. We'll solve all your problems within 12 to 24 hours and with 101% guarantee and with astrology systematic. If you want to take any personal or professional advice then also you can call us on +92322-6382012 , ONLINE LOVE PROBLEM & Other all types of Daily Life Problem's.Then CALL or WHATSAPP us on +92322-6382012 and Get all these problems solutions here by Amil Baba DAWOOD BANGALI
#vashikaranspecialist #astrologer #palmistry #amliyaat #taweez #manpasandshadi #horoscope #spiritual #lovelife #lovespell #marriagespell#aamilbabainpakistan #amilbabainkarachi #powerfullblackmagicspell #kalajadumantarspecialist #realamilbaba #AmilbabainPakistan #astrologerincanada #astrologerindubai #lovespellsmaster #kalajaduspecialist #lovespellsthatwork #aamilbabainlahore#blackmagicformarriage #aamilbaba #kalajadu #kalailam #taweez #wazifaexpert #jadumantar #vashikaranspecialist #astrologer #palmistry #amliyaat #taweez #manpasandshadi #horoscope #spiritual #lovelife #lovespell #marriagespell#aamilbabainpakistan #amilbabainkarachi #powerfullblackmagicspell #kalajadumantarspecialist #realamilbaba #AmilbabainPakistan #astrologerincanada #astrologerindubai #lovespellsmaster #kalajaduspecialist #lovespellsthatwork #aamilbabainlahore #blackmagicforlove #blackmagicformarriage #aamilbaba #kalajadu #kalailam #taweez #wazifaexpert #jadumantar #vashikaranspecialist #astrologer #palmistry #amliyaat #taweez #manpasandshadi #horoscope #spiritual #lovelife #lovespell #marriagespell#aamilbabainpakistan #amilbabainkarachi #powerfullblackmagicspell #kalajadumantarspecialist #realamilbaba #AmilbabainPakistan #astrologerincanada #astrologerindubai #lovespellsmaster #kalajaduspecialist #lovespellsthatwork #aamilbabainlahore #Amilbabainuk #amilbabainspain #amilbabaindubai #Amilbabainnorway #amilbabainkrachi #amilbabainlahore #amilbabaingujranwalan #amilbabainislamabad
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.
2. INTRODUCTION
The transformer is a static device which is used to transfer electrical energy
from one ac circuit to another ac circuit.
Input to a transformer and output from a transformer both are alternating
quantities (AC).
Electrical energy is generated and transmitted at an extremely high voltages.
The voltage is to be then reduced to a lower value for its domestic and industrial
use.
This is done by using a transformer.
3. The power transmission system using transformers is shown in figure.
When the transformer changes the voltage level, it changes the current level
also.
4. The primary winding is connected to the ac supply, an ac current starts
flowing through it.
5. The ac primary current produces an alternating flux (Ф) in the core.
Most of this changing flux gets linked with the secondary winding through
the core.
The varying flux will induce voltage into the secondary winding according
to the faraday’s laws of electromagnetic induction.
There is no electrical contact between the two winding, an electrical energy
gets transferred from primary to the secondary.
6. A simple transformer consists of two electrical conductors called the
primary winding and the secondary winding.
Energy is coupled between the windings by the time varying magnetic flux
that passes through( links) both primary and secondary windings.
7. The transformer action does not take place with a direct current of constant
magnitude.
Because with a DC primary current, the flux produced in the core is not
alternating but it is of constant value.
As there is no change in the flux linkage with the secondary winding, the
induced emf in the secondary is zero.
8. If DC is applied to the primary then there is a possibility of transformer
core saturation.
If core saturates the primary will draw excessively large current. Therefore
application of DC should be avoided.
9. The transformer are of different types-
a) Static transformer
b) Variable transformer
c) Autotransformer
The magnetic core is a stack of thin silicon-steel laminations. In order to
reduce the eddy current losses, these laminations are insulated from one
another.
10.
11.
12. PRINCIPLE
A transformer is based on the principle of mutual induction, i.e. whenever the
amount of magnetic flux linked with the coil changes, an emf is induced in the
neighbouring coil.
13. CONSTRUCTION
It consists of two coils of insulated wire, the primary and the secondary coils,
wound on a laminated soft iron core. The coils are completely insulated from
each other and one usually contains more turns of wire than the other. The
frame is often rectangular in shape and the coils may be wound on opposite bars
of the frame or one on top of the other on a central bar.
14. STATIC TRANSFORMER
The static transformer is based on the principles of electromagnetic induction
and is used to alter voltage of an alternating current and to render the current
earth free.
15. An alternating current is passed through the primary coil and sets up a varying
magnetic field, which cuts the secondary coil and induces an EMF in it. It is
essential that the primary current varies in intensity; otherwise, there is no
movement of the magnetic field relative to the conductor and no EMF is induced
in the secondary coil. There is no electrical conduction between the primary and
the secondary coils, the energy being transmitted from one to the other by
electromagnetic induction. The core serves to concentrate the magnetic field and is
made of soft iron, as this material is easily magnetized and demagnetized. It is
laminated to prevent eddy currents.
WORKING OF THE STATIC TRANSFORMER
16. FUNCTIONS OF THE STATIC TRANSFORMER
Alters the voltage of an alternating current: The EMF induced in the secondary
coil depends upon the number of turns of wire it has, relative to the primary coil.
Depending on this number of turns, the transformers can be classified as:
Step-up transformer- If the number of turns in the secondary is more than that
of the primary, the voltage developed in the secondary will be increased or
stepped up. Such a device is called a step-up transformer.
17.
18. Step-down transformer- If the secondary coil has fewer turns than the primary,
then the EMF, or voltage in the secondary will be less than in the primary, i.e. it
is stepped down. Such an arrangement produces a step-down transformer.
19. Even ratio transformer- If the number of turns in the primary and secondary
coils is the same, the voltage in the primary is the same as that of the secondary.
Such a device is called an even ratio transformer.
20. Renders a current earth free: If an accidental connection is made between live
wire and earth, current will flow to earth as short-circuited current. If this
connection were made through persons, they would then receive earth shock, as
the current flows through them to earth. The static transformer reduces this
danger by using electromagnetic induction, to transfer the electrical energy into
the secondary coil, where earth plays no part in the circuit. The effect on the
secondary coil of the magnetic field around the primary is to cause electrons to
move around the secondary circuit, but not to leave it. Earth plays no part in the
secondary circuit, because, even if an earth connection is made with it, electrons
will not leave the circuit, but will continue to flow around it. This is an important
safety factor and that all currents applied to patients are rendered earth free by
using a static transformer.
21. VARIABLE TRANSFORMER
This consists of a primary and a secondary coil and is made so that one of them can
be altered in length. The primary coil has a number of tappings and a movable
contact can be placed on any one of these by turning a knobs. There is a step up
voltage in the secondary coil. In this way, a very crude control of voltage is
obtained.
22.
23. AUTOTRANSFORMER
It consists of a single coil of wire with four contact points coming from it. It works
on the principles of electromagnetic induction, but it has the disadvantage that it
allows only a small step up and does not render the current earth free.
24. USES OF TRANSFORMER
A transformer is used in almost all a.c. operations, e.g.
In voltage regulators of TV, refrigerator, computer, air conditioner, etc.
In the induction furnaces
A step down transformer is used for welding purposes.
In the transmission of a.c. over long distances.
25. Eddy currents are created through a process called electromagnetic induction.
When alternating current is applied to the conductor, such as copper wire, a
magnetic field develops in and around the conductor.
EDDY CURRENTS
26. Eddy currents are induced electrical currents that flow in a circular path. They
get their name from “eddies” that are formed when a liquid or gas flows in a
circular path.
27. When an alternating magnetic field is applied to a magnetic material, an emf is
induced in the material itself according to Faraday’s Law of Electromagnetic
induction. Since the magnetic material is a conducting material, these EMFs
circulate current within the body of the material.
These circulating currents are called Eddy Currents. They will occur when the
conductor experiences a changing magnetic field.
As these currents are not responsible for doing any useful work, and it produces
a loss in the magnetic material known as an Eddy Current Loss. Eddy current
loss increases the temperature of the magnetic material.
Eddy currents are used to produce heat in the patient’s tissue, in the
inductothermy method of SWD.
28.
29. If the core is made up of solid iron of larger cross-sectional area, the magnitude
of current will be very large and hence losses will be high. The magnitude of
the current can be reduced by splitting the solid core into thin sheets called
laminations. By laminating the core, the area of each section is reduced and
hence the induced emf also reduces.