A transformer is a device that converts low voltage, high current into high voltage, low current (and vice versa) using the principle of electromagnetic induction. It consists of two coils wound around an iron core, and works by inducing an alternating voltage in the secondary coil through a changing magnetic field generated in the primary coil. Transformers range in size from small units in microphones to large, heavy units connecting power grids, and are essential for high voltage transmission of electricity over long distances.
types of transformers,seminar on transformers,
What is Transformer,
Working principle,
Types of transformers,
Ideal and practical transformer,
Applications of transformers.
types of transformers,seminar on transformers,
What is Transformer,
Working principle,
Types of transformers,
Ideal and practical transformer,
Applications of transformers.
WHAT IS TRANSFORMER, DEFINE TRANSFORMER, TYPES OF TRANSFORMER, RATINGS OF TRANSFORMERS, MANUFACTURING PROCESS OF TRANSFORMER, PARTS OF TRANSFORMER, TESTS OF TRANSFORMER, COSTING OF COPPER.
Equivalent circuit diagram of a transformer is basically a diagram which can be resolved into an equivalent circuit in which the resistance and leakage reactance of the transformer are imagined to be external to the winding. Where, R1 = Primary Winding Resistance. R2= Secondary winding Resistance.
Generation of High Frequency AC High VoltagePratheep M
This ppt explained the generation of high frequency ac high voltage using tesla coil. Also it explains more about the tesla coil and derivation of generation of high frequency ac voltage using tesla coil.
Transformer types core, shell, toroidal. steps to design a EI core type transformer by calculating tongue width, stack height etc and two examples are given
WHAT IS TRANSFORMER, DEFINE TRANSFORMER, TYPES OF TRANSFORMER, RATINGS OF TRANSFORMERS, MANUFACTURING PROCESS OF TRANSFORMER, PARTS OF TRANSFORMER, TESTS OF TRANSFORMER, COSTING OF COPPER.
Equivalent circuit diagram of a transformer is basically a diagram which can be resolved into an equivalent circuit in which the resistance and leakage reactance of the transformer are imagined to be external to the winding. Where, R1 = Primary Winding Resistance. R2= Secondary winding Resistance.
Generation of High Frequency AC High VoltagePratheep M
This ppt explained the generation of high frequency ac high voltage using tesla coil. Also it explains more about the tesla coil and derivation of generation of high frequency ac voltage using tesla coil.
Transformer types core, shell, toroidal. steps to design a EI core type transformer by calculating tongue width, stack height etc and two examples are given
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
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
Macroeconomics- Movie Location
This will be used as part of your Personal Professional Portfolio once graded.
Objective:
Prepare a presentation or a paper using research, basic comparative analysis, data organization and application of economic information. You will make an informed assessment of an economic climate outside of the United States to accomplish an entertainment industry objective.
Operation “Blue Star” is the only event in the history of Independent India where the state went into war with its own people. Even after about 40 years it is not clear if it was culmination of states anger over people of the region, a political game of power or start of dictatorial chapter in the democratic setup.
The people of Punjab felt alienated from main stream due to denial of their just demands during a long democratic struggle since independence. As it happen all over the word, it led to militant struggle with great loss of lives of military, police and civilian personnel. Killing of Indira Gandhi and massacre of innocent Sikhs in Delhi and other India cities was also associated with this movement.
Embracing GenAI - A Strategic ImperativePeter Windle
Artificial Intelligence (AI) technologies such as Generative AI, Image Generators and Large Language Models have had a dramatic impact on teaching, learning and assessment over the past 18 months. The most immediate threat AI posed was to Academic Integrity with Higher Education Institutes (HEIs) focusing their efforts on combating the use of GenAI in assessment. Guidelines were developed for staff and students, policies put in place too. Innovative educators have forged paths in the use of Generative AI for teaching, learning and assessments leading to pockets of transformation springing up across HEIs, often with little or no top-down guidance, support or direction.
This Gasta posits a strategic approach to integrating AI into HEIs to prepare staff, students and the curriculum for an evolving world and workplace. We will highlight the advantages of working with these technologies beyond the realm of teaching, learning and assessment by considering prompt engineering skills, industry impact, curriculum changes, and the need for staff upskilling. In contrast, not engaging strategically with Generative AI poses risks, including falling behind peers, missed opportunities and failing to ensure our graduates remain employable. The rapid evolution of AI technologies necessitates a proactive and strategic approach if we are to remain relevant.
Acetabularia Information For Class 9 .docxvaibhavrinwa19
Acetabularia acetabulum is a single-celled green alga that in its vegetative state is morphologically differentiated into a basal rhizoid and an axially elongated stalk, which bears whorls of branching hairs. The single diploid nucleus resides in the rhizoid.
Biological screening of herbal drugs: Introduction and Need for
Phyto-Pharmacological Screening, New Strategies for evaluating
Natural Products, In vitro evaluation techniques for Antioxidants, Antimicrobial and Anticancer drugs. In vivo evaluation techniques
for Anti-inflammatory, Antiulcer, Anticancer, Wound healing, Antidiabetic, Hepatoprotective, Cardio protective, Diuretics and
Antifertility, Toxicity studies as per OECD guidelines
Read| The latest issue of The Challenger is here! We are thrilled to announce that our school paper has qualified for the NATIONAL SCHOOLS PRESS CONFERENCE (NSPC) 2024. Thank you for your unwavering support and trust. Dive into the stories that made us stand out!
Welcome to TechSoup New Member Orientation and Q&A (May 2024).pdfTechSoup
In this webinar you will learn how your organization can access TechSoup's wide variety of product discount and donation programs. From hardware to software, we'll give you a tour of the tools available to help your nonprofit with productivity, collaboration, financial management, donor tracking, security, and more.
2024.06.01 Introducing a competency framework for languag learning materials ...Sandy Millin
http://sandymillin.wordpress.com/iateflwebinar2024
Published classroom materials form the basis of syllabuses, drive teacher professional development, and have a potentially huge influence on learners, teachers and education systems. All teachers also create their own materials, whether a few sentences on a blackboard, a highly-structured fully-realised online course, or anything in between. Despite this, the knowledge and skills needed to create effective language learning materials are rarely part of teacher training, and are mostly learnt by trial and error.
Knowledge and skills frameworks, generally called competency frameworks, for ELT teachers, trainers and managers have existed for a few years now. However, until I created one for my MA dissertation, there wasn’t one drawing together what we need to know and do to be able to effectively produce language learning materials.
This webinar will introduce you to my framework, highlighting the key competencies I identified from my research. It will also show how anybody involved in language teaching (any language, not just English!), teacher training, managing schools or developing language learning materials can benefit from using the framework.
Introduction to AI for Nonprofits with Tapp NetworkTechSoup
Dive into the world of AI! Experts Jon Hill and Tareq Monaur will guide you through AI's role in enhancing nonprofit websites and basic marketing strategies, making it easy to understand and apply.
Model Attribute Check Company Auto PropertyCeline George
In Odoo, the multi-company feature allows you to manage multiple companies within a single Odoo database instance. Each company can have its own configurations while still sharing common resources such as products, customers, and suppliers.
Palestine last event orientationfvgnh .pptxRaedMohamed3
An EFL lesson about the current events in Palestine. It is intended to be for intermediate students who wish to increase their listening skills through a short lesson in power point.
2. INTRO A transformer is a device used for converting low alternating voltage at high current into high voltage at low current and vice-versa. It works on the principle of mutual induction i.e. if two coils are inductively coupled and when current or magnetic flux is changed through one of the two coils,then induced e.m.f is produced in the other coil. In the vast majority of transformers, the windings are coils wound around a ferromagnetic core, air-core transformers being a notable exception. Transformers range in size from a thumbnail-sized coupling transformer hidden inside a stage microphone to huge units weighing hundreds of tons used to interconnect portions of power grids. Transformers are essential for high voltage power transmission, which makes long distance transmission economically practical. 2/23/2011 2
3. DISCOVERY The phenomenon of electromagnetic induction was discovered independently by Michael Faraday and Joseph Henry in 1831. However, Faraday was the first to publish the results of his experiments and thus receive credit for the discovery.[ The relationship between electromotive force (EMF) or "voltage" and magnetic flux was formalized in an equation now referred to as "Faraday's law of induction": where is the magnitude of the EMF in volts and ΦB is the magnetic flux through the circuit (in webers). Faraday performed the first experiments on induction between coils of wire, including winding a pair of coils around an iron ring, thus creating the first toroidal closed-core transformer. 2/23/2011 3
4. CONSTRUCTION An elementary transformer consists of a soft iron or silicon steel core and two windings, placed on it. The windings are insulated from both the core and each other. The core is built up of thin soft iron or low reluctance to the magnetic flux. The winding connected to the magnetic flux. The winding connected to the supply main is called the primary and the winding connected to the load circuit is called the secondary. 2/23/2011 4
5. WORKING When the primary winding is connected to an ac supply mains, current flows through it. Since this winding links with an iron core, so current flowing through this winding produces an alternating flux in the core. Since this flux is alternating and links with the secondary winding also, so induces an emf in the secondary winding. The frequency of induced emf in secondary winding is the same as that of the flux or that of the s supply voltage. The induced emf in the secondary winding enables it to deliver current to an external load connected across it. Thus the energy is transformed from primary winding to the secondary winding by means of electro-magnetic induction without any change in frequency. The flux Ø of the iron core links not only with the secondary winding but also with the primary winding, so produces self-induced emf in the primary winding: This induced in the primary winding opposes the applied voltage and therefore sometimes it is known as back emf of the primary. In fact the induced emf in the primary winding limits the primary current in much the same way that the back emf in a dc motor limits the armature current. 2/23/2011 5
6.
7. STEP-DOWN TRANSFORMER In a step-down transformer the number of turns in seondary coil (Ns) is less than that in primary coil(Np). In a step-down transformer ,the primary coil is made of a thin wire and the secondary coil of thick wire.It converts a high voltage at low current into a low voltage at high current 2/23/2011 7
8. APPLICATIONS A step-down transformer is used for obtaining large current for electric welding. A step-down transformer is used in induction furnace for melting the metals. A step-up transformer is used for the production of X-rays. Transformers are used in voltage regulators and stabilised power supplies. 2/23/2011 8
9. ENERGY LOSSES IN A TRANSFORMER Various types of energy losses,which occur in a transformer, are as follows-: Flux losses:The coupling of primary and secondary coils is never perfect and whole of the magnetic flux produced in the primary coil never gets linked up with the secondary coil. Copper losses:Due to resistance of the windings of primary and secondary coils,some electrical energy is always converted into heat energy. Iron losses:The varying magnetic flux produces eddy currents in the iron core,which also leads to the wastage of energy in the form of heat.It is minimised using a laminated iron core. Hysteresis losses:Thea.c. current flowing through the coils magnetises and demagnetises the iron core again and again.Due to which,some energy is lost because of hysteresis.However it can be minimised by selecting the material of core which has a narrow hysteresis loop. 2/23/2011 9
10. ROLE OF TRANSFORMER IN ELECTRICITY TRANSMISSION Most of the electricity used at homes and businesses is generated at power plants; usually these power plants are located far away from metropolitan areas. Thus it becomes necessary to transmit electricity from remote locations to the cities; the traveling of electricity through long distances results in power losses. An effective solution to reduce the power losses along the way is electricity transmission at high voltages. For this purpose, the output voltage of the electric generating plants is increased using a step-up transformer. Subsequently, during transmission, the voltage is stepped-down in sub-stations and distributed to lines along city streets. Finally, transformers at street poles, step-down the voltage to 240 or 120 volts at which home appliances work. 2/23/2011 10