transformer.pptx
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Transformers are devices that increase or decrease the voltage of alternating current by using two coils of wire wrapped around an iron core. They work by inducing a changing magnetic field in one coil to generate a current in the other coil. The ratio of turns of wire in the primary coil to the secondary coil determines whether the transformer is a step-up transformer, increasing voltage, or a step-down transformer, decreasing voltage. Transformers are used to efficiently match electrical loads that require different voltages like powering electronics or appliances from main power supplies.
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Autotransformer.pptx
An autotransformer has a single winding that acts as both the primary and secondary winding. It uses a tapping mechanism to vary the number of turns for the secondary, which varies the output voltage while keeping it proportional to the input voltage. Autotransformers are more economical than two-winding transformers since they require less winding and core material. They are used for applications requiring a variable output voltage close to the input voltage, such as voltage regulation or motor starting. However, the load is not electrically isolated from the source like it is in a two-winding transformer.
Electromagnetic induction
1. Electromagnetic induction occurs when a changing magnetic field induces a current in a conductor. This can be generated by moving a magnet near a coil or changing the current in a neighboring circuit.
2. Faraday's law states that an electromotive force (EMF) is induced in a conductor whenever the magnetic flux through the conductor changes. The magnitude of the induced EMF is proportional to the rate of change of flux.
3. Transformers use electromagnetic induction to change the voltage of alternating current. A step-up transformer increases voltage by having fewer turns in the primary coil, while a step-down transformer decreases voltage with more turns in the primary coil.
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Transformers work by transferring electrical energy from one coil to another through electromagnetic induction. They increase or decrease voltage by changing the ratio of coil turns between the primary and secondary windings. Higher voltages allow power to be transmitted over long distances more efficiently before being stepped down for safe distribution and use. Transformers maintain the same frequency but change the voltage and current according to their turns ratio.
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Transformers are electrical devices that increase or decrease alternating current (AC) voltages through the principle of electromagnetic induction. They consist of two coils - a primary coil and secondary coil - wrapped around an iron core. When an alternating current flows through the primary coil, it induces an alternating voltage in the secondary coil. The ratio of the number of turns in the primary coil to the number of turns in the secondary coil determines the ratio of the voltages. Transformers are used to efficiently transfer electrical power from one circuit to another while isolating the two circuits. Common transformer types include isolation transformers and autotransformers.
Mod_1_Transformers1.ppt
Transformers are electrical devices that increase or decrease alternating current (AC) voltages through the principle of electromagnetic induction. They consist of two coils - a primary coil and secondary coil - wrapped around an iron core. When an alternating current flows through the primary coil, it induces an alternating voltage in the secondary coil. The ratio of the number of turns in the primary coil to the number of turns in the secondary coil determines the ratio of the voltages. Transformers are used to efficiently transfer electrical power from one circuit to another while isolating the two circuits. Common transformer types include isolation transformers and autotransformers.
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This document summarizes key concepts about transformers:
1) Transformers transfer electrical energy from one voltage level to another through a magnetic field without changing frequency. They have a primary and secondary winding wound around an iron core.
2) An AC voltage applied to the primary induces a voltage in the secondary according to Faraday's Law of induction. The ratio of voltages is determined by the ratio of turns in the windings.
3) Real transformers have losses that are modeled in an equivalent circuit including resistances of the windings and core and a magnetizing reactance. Impedances can be transferred between windings using the turns ratio.
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An autotransformer has a single winding that acts as both the primary and secondary winding. It uses a tapping mechanism to vary the number of turns for the secondary, which varies the output voltage while keeping it proportional to the input voltage. Autotransformers are more economical than two-winding transformers since they require less winding and core material. They are used for applications requiring a variable output voltage close to the input voltage, such as voltage regulation or motor starting. However, the load is not electrically isolated from the source like it is in a two-winding transformer.
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2. Faraday's law states that an electromotive force (EMF) is induced in a conductor whenever the magnetic flux through the conductor changes. The magnitude of the induced EMF is proportional to the rate of change of flux.
3. Transformers use electromagnetic induction to change the voltage of alternating current. A step-up transformer increases voltage by having fewer turns in the primary coil, while a step-down transformer decreases voltage with more turns in the primary coil.
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Transformers work by transferring electrical energy from one coil to another through electromagnetic induction. They increase or decrease voltage by changing the ratio of coil turns between the primary and secondary windings. Higher voltages allow power to be transmitted over long distances more efficiently before being stepped down for safe distribution and use. Transformers maintain the same frequency but change the voltage and current according to their turns ratio.
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Transformers are electrical devices that increase or decrease alternating current (AC) voltages through the principle of electromagnetic induction. They consist of two coils - a primary coil and secondary coil - wrapped around an iron core. When an alternating current flows through the primary coil, it induces an alternating voltage in the secondary coil. The ratio of the number of turns in the primary coil to the number of turns in the secondary coil determines the ratio of the voltages. Transformers are used to efficiently transfer electrical power from one circuit to another while isolating the two circuits. Common transformer types include isolation transformers and autotransformers.
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Transformers are electrical devices that increase or decrease alternating current (AC) voltages through the principle of electromagnetic induction. They consist of two coils - a primary coil and secondary coil - wrapped around an iron core. When an alternating current flows through the primary coil, it induces an alternating voltage in the secondary coil. The ratio of the number of turns in the primary coil to the number of turns in the secondary coil determines the ratio of the voltages. Transformers are used to efficiently transfer electrical power from one circuit to another while isolating the two circuits. Common transformer types include isolation transformers and autotransformers.
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This document summarizes key concepts about transformers:
1) Transformers transfer electrical energy from one voltage level to another through a magnetic field without changing frequency. They have a primary and secondary winding wound around an iron core.
2) An AC voltage applied to the primary induces a voltage in the secondary according to Faraday's Law of induction. The ratio of voltages is determined by the ratio of turns in the windings.
3) Real transformers have losses that are modeled in an equivalent circuit including resistances of the windings and core and a magnetizing reactance. Impedances can be transferred between windings using the turns ratio.
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This document summarizes key concepts about transformers:
1) Transformers transfer electrical energy from one voltage level to another through magnetic coupling between primary and secondary coils. They do not directly convert electrical to mechanical energy.
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The document discusses transformers, including their construction, principle of operation, types (step-up and step-down), applications, and history. A transformer is a device that changes alternating current voltages through inductive coupling between two coils. It consists of a primary coil, secondary coil, and iron core. The principle is based on Faraday's law of induction. Transformers are used to increase or decrease voltages for power transmission or electronic devices and were an important development in the history of electricity.
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Here are the solutions to the transformer problems:
1. A transformer has 100 turns on coil 1 and 200 turns on coil 2.
i. If the voltage on coil 1 is 10 volts, the voltage on coil 2 will be 20 volts (Voltage on coil 2 = Voltage on coil 1 x Turns on coil 2/Turns on coil 1 = 10V x 200/100 = 20V)
ii. If the voltage on coil 1 is 200 volts, the voltage on coil 2 will be 400 volts (Voltage on coil 2 = Voltage on coil 1 x Turns on coil 2/Turns on coil 1 = 200V x 200/100 = 400V)
iii.
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- The main types of transformers including step-up, step-down, auto, poly-phase, leakage, resonant, and instrument transformers.
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Transformers change one voltage to another through electromagnetic induction between two coils. They work by using a changing current in the primary coil to induce a current in the secondary coil via a shared magnetic field in an iron core. The ratio of voltages between the coils equals the ratio of turns of wire. Proper design with laminated cores and thin wire improves efficiency by reducing eddy currents and resistance. Transformers allow efficient transmission of power over long distances at high voltages before stepping voltages back down for end use.
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This document provides an overview of transformer principles and operation. It discusses how transformers work by using mutual induction between two coils to change voltage levels. Key points covered include transformer components, turns ratio, step-up and step-down functions, efficiency losses, tap changing, and three-phase configurations. Transformer types like power, distribution, instrument and phase shifting transformers are also summarized.
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2. Transformers operate on the principle of mutual induction, where an emf is induced in one coil by a change in current in a neighboring coil.
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Transformers are static devices that change alternating current (AC) voltages from one level to another through magnetic induction. They consist of two coils wrapped around an iron core, and work by electromagnetic induction. Transformers can step voltages up or down, depending on the number of turns in the primary and secondary coils. Common applications of transformers include power transmission, electronics coupling, and providing different voltages for loads.
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This document summarizes key concepts about transformers:
1) Transformers transfer electrical energy from one voltage level to another through magnetic coupling between primary and secondary coils. They do not directly convert electrical to mechanical energy.
2) An ideal transformer transfers power without losses, but real transformers have resistive losses in their coils and core that reduce efficiency.
3) The voltage and current ratios between primary and secondary coils are determined by their relative turn ratios; this relationship allows impedances to be transferred between sides.
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Transformers work on the principle of mutual induction to transform electrical energy from one circuit to another without a direct electrical connection. They consist of two coils wound around an iron core, with the primary coil connected to an alternating current source. As the current changes in the primary coil, it induces a changing magnetic field in the core which in turn induces an alternating current in the secondary coil. Transformers can step up or step down voltages depending on the ratio of turns in the primary and secondary coils. They are widely used in power distribution and electronics applications to efficiently transfer power or match voltages. However, some energy is lost through heat in the core and coils.
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The document discusses transformers, including their construction, principle of operation, types (step-up and step-down), applications, and history. A transformer is a device that changes alternating current voltages through inductive coupling between two coils. It consists of a primary coil, secondary coil, and iron core. The principle is based on Faraday's law of induction. Transformers are used to increase or decrease voltages for power transmission or electronic devices and were an important development in the history of electricity.
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The Principle, Constructions, Working, Ideal Transformer, Leakages, Efficiency, Cores, Related Solved Problems. etc. are readily available in this power-point.
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- It works on the principle of mutual induction between two coils - an alternating current in the primary coil induces an alternating voltage in the secondary coil.
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Transfomer
Here are the solutions to the transformer problems:
1. A transformer has 100 turns on coil 1 and 200 turns on coil 2.
i. If the voltage on coil 1 is 10 volts, the voltage on coil 2 will be 20 volts (Voltage on coil 2 = Voltage on coil 1 x Turns on coil 2/Turns on coil 1 = 10V x 200/100 = 20V)
ii. If the voltage on coil 1 is 200 volts, the voltage on coil 2 will be 400 volts (Voltage on coil 2 = Voltage on coil 1 x Turns on coil 2/Turns on coil 1 = 200V x 200/100 = 400V)
iii.
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An x-ray generator uses a transformer assembly and control panel to supply electric power to the x-ray tube. The transformer assembly contains components like transformers, a rectifier, and capacitors that modify incoming alternating current into high voltage direct current needed by the x-ray tube. It increases the voltage using step-up transformers by factors of 600 or more. The control panel contains components that allow adjusting and monitoring of exposure parameters like kVp and mA, as well as buttons to initiate and terminate x-ray exposures. Modern x-ray generators use advanced rectification and switching circuits to provide stable, ripple-free power for short exposures like in angiography and fluoroscopy.
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- How a transformer works using mutual induction to change the voltage of alternating current between a primary and secondary coil.
- The basic construction of a transformer with an iron core and two insulated coils.
- The main types of transformers including step-up, step-down, auto, poly-phase, leakage, resonant, and instrument transformers.
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Transformers change one voltage to another through electromagnetic induction between two coils. They work by using a changing current in the primary coil to induce a current in the secondary coil via a shared magnetic field in an iron core. The ratio of voltages between the coils equals the ratio of turns of wire. Proper design with laminated cores and thin wire improves efficiency by reducing eddy currents and resistance. Transformers allow efficient transmission of power over long distances at high voltages before stepping voltages back down for end use.
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This document provides an overview of transformer principles and operation. It discusses how transformers work by using mutual induction between two coils to change voltage levels. Key points covered include transformer components, turns ratio, step-up and step-down functions, efficiency losses, tap changing, and three-phase configurations. Transformer types like power, distribution, instrument and phase shifting transformers are also summarized.
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A transformer is a device that transfers electrical energy between two circuits through electromagnetic induction. It consists of two coils wound around an iron core. The primary coil is connected to a power source and the secondary coil is connected to a load. An alternating current in the primary coil induces a magnetic field that links to the secondary coil, inducing voltage in it. There are step-up transformers, which increase voltage, and step-down transformers, which decrease voltage. Transformers are used efficiently in the national power grid to transmit electricity over long distances at high voltages to reduce energy loss, before stepping voltages back down for safe distribution to homes.
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The document provides information about transformers, including:
1. Transformers are AC devices that change high voltage low current into low voltage high current and vice versa without changing frequency through electromagnetic induction between two electric circuits.
2. Transformers operate on the principle of mutual induction, where an emf is induced in one coil by a change in current in a neighboring coil.
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This document discusses alternating current (AC) and how it is generated, transmitted, and used. It explains that in an AC generator, the direction of the output current reverses each time the coil passes the vertical position. Transformers are used to increase or decrease AC voltages by using two coils with a different number of turns. Common devices like homes, offices, and large appliances use AC power from the electric grid, while devices like flashlights and laptops run on direct current from batteries.
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Transformers are static devices that change alternating current (AC) voltages from one level to another through magnetic induction. They consist of two coils wrapped around an iron core, and work by electromagnetic induction. Transformers can step voltages up or down, depending on the number of turns in the primary and secondary coils. Common applications of transformers include power transmission, electronics coupling, and providing different voltages for loads.
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The event will cover the following::
Walmart Business + (https://business.walmart.com/plus) is a new shopping experience for nonprofits, schools, and local business customers that connects an exclusive online shopping experience to stores. Benefits include free delivery and shipping, a 'Spend Analytics” feature, special discounts, deals and tax-exempt shopping.
Special TechSoup offer for a free 180 days membership, and up to $150 in discounts on eligible orders.
Spark Good (walmart.com/sparkgood) is a charitable platform that enables nonprofits to receive donations directly from customers and associates.
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Date: May 29, 2024
Tags: Information Security, ISO/IEC 27001, ISO/IEC 42001, Artificial Intelligence, GDPR
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Find out more about ISO training and certification services
Training: ISO/IEC 27001 Information Security Management System - EN | PECB
ISO/IEC 42001 Artificial Intelligence Management System - EN | PECB
General Data Protection Regulation (GDPR) - Training Courses - EN | PECB
Webinars: https://pecb.com/webinars
Article: https://pecb.com/article
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www.StokeNewingtonHistory.com
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- 2. WHAT IS A TRANSFORMER? - it is a device that is used to raise or lower down the potential difference of an alternating current.
- 4. Symbol of A Transformer
- 7. Step Up and Down Transformer
- 8. Machine Tool Control Transformer
- 10. Chint Series HB Ring Transformers - used for controlling power supply in electronic instruments, household appliances and machine tool equipments with the circuit
- 13. Television Set (>1k V) Door Bell (6V) Step-Up Transformer Step-Down Transformer Main Supply (240V) Example:
- 14. ~ Supply ~ Electrical Load Primary Coil Secondary Coil Soft Iron Core Primary Coil - Connected to electrical supply (eg. battery, switch) Secondary Coil - Connected to electrical load (eg. Lamp, door bell, television set) The structure of transformer:
- 15. Transformers are grouped as: Primary Coil Secondary Coil Load Supply Secondary Coil Primary Coil Load Supply • Step-Up Transformer - Lesser coil in primary • Step-Down Transformer - Lesser coil in Secondary
- 16. Working principle When the switch is closed: •Current in primary coil increases •Creates increasing magnetic field in primary coil •Induces current in secondary coil •Lamp lights up Primary Coil Secondary Coil Soft Iron Core
- 17. When current in primary coil becomes steady: • No more changes in the magnetic field in primary coil • No more current induced in secondary coil • Lamp goes off When switch is opened: • Current in primary coil decreases to zero • Creates decreasing magnetic field in primary coil • Induces current in opposite direction in secondary coil • Lamp lights up again
- 18. The transformer equation relates the number of turns of wire to the difference in voltage between the primary and secondary coils. Vp/Vs = Np/Ns Where : Vp = is the voltage in the primary coil. Vs = is the voltage in the secondary coil. Np = is the number of turns of wire on the primary coil. Ns = is the number of turns of wire on the secondary coil.
- 19. Improving the efficiency of transformer: 1. Design of the core: • Use effective soft magnetic material • Laminated core to reduce the flow of eddy currents • Ensure that the magnetic field produced by the primary coil is linked completely to the secondary coil 2. Use low-resistance copper wires to reduce losing energy in the form of heat