The document discusses magnetic levitation (maglev) trains. It describes how maglev trains float on a magnetic field and have no wheels, enabling speeds up to 330 mph. Maglev systems use electromagnetic forces for both levitation and propulsion via linear induction motors. The document provides a brief history of maglev development in Germany from the 1920s to present. It explains the basic principles of magnetic levitation using repulsion between electromagnets or diamagnetic materials. Maglev trains are supported, guided, and propelled entirely by electromagnetic forces, allowing very high speeds with minimal friction or pollution.
Maglev trains use magnetic levitation to float above the track and move without friction, allowing for very high speeds. There are three main types of maglev systems that differ in how they levitate and propel the train using electromagnetic or electrodynamic suspension and guidance. Maglev trains have advantages over traditional trains in that they have no contact between wheels and rails, eliminating the possibility of derailment, require little maintenance, and can travel much faster. However, maglev systems also have higher infrastructure costs and technological challenges to overcome.
The document discusses Maglev trains, which use magnetic levitation to float above the guideway and propel the train forward. Maglev trains have reached speeds over 500 km/h and have several advantages over conventional trains, such as having no friction, requiring no fuel, and being safer. However, their construction is very expensive. In conclusion, Maglev trains provide efficient high-speed travel but have high initial costs compared to traditional trains.
Maglevtrainsnew 150401040530-conversion-gate01Ashutosh Kar
ย
The document provides an overview of maglev train technology. It discusses the basic principles of magnetic levitation (maglev) including electromagnetic suspension and electrodynamic suspension. It covers how maglev trains are propelled and stabilized. The document also compares maglev trains to conventional trains and aircraft, discusses economics and existing maglev systems, and concludes with advantages and applications of maglev technology.
The document discusses electric vehicles (EVs). It defines different types of EVs, including battery electric vehicles (BEVs) which run entirely on batteries, plug-in hybrid electric vehicles (PHEVs) which can be plugged in and run partly on batteries, and hybrid electric vehicles (HEVs) which cannot be plugged in. It provides details on how each type works and its pros and cons. It also discusses the history of EVs, components of EVs like batteries and motors, EV infrastructure including charging stations, and high performance EVs like the NIO EP9 that can reach speeds up to 194 mph.
The document discusses magnetic levitation (Maglev) trains. It begins by defining Maglev as using magnetic levitation to suspend, guide, and propel trains using magnets. It then explains the basic principles of levitation, propulsion, and lateral guidance that Maglev trains use to operate at high speeds. This includes using magnets to levitate the train 10 cm above the track and linear motors in the guideway to propel the train electromagnetically. The document also discusses the technologies, merits, and demographics of existing and planned Maglev systems around the world.
Maglev trains use magnetic levitation to float above the guideway and magnetic propulsion for movement. There are two main types - electromagnetic suspension (EMS) which uses electromagnets and electrodynamic suspension (EDS) which uses superconducting magnets. EMS systems can operate at lower speeds while EDS can reach over 500km/hr. Maglev trains have advantages over conventional trains like higher speeds, less maintenance, and better efficiency. However, their initial costs are very high. Existing operational maglev systems include the Shanghai Maglev Train and Linimo train in Japan.
The document discusses high speed rail systems. It defines high speed rail as trains that travel significantly faster than traditional rail, using specialized rolling stock and dedicated tracks. It notes that while definitions vary, trains over 250 km/h are widely considered high speed. The first high speed rail system began in Japan in 1964, known as the Shinkansen or bullet train. High speed rail has since been successful in several European countries as well.
Maglev trains use magnetic levitation to float above the track and move without friction, allowing for very high speeds. There are three main types of maglev systems that differ in how they levitate and propel the train using electromagnetic or electrodynamic suspension and guidance. Maglev trains have advantages over traditional trains in that they have no contact between wheels and rails, eliminating the possibility of derailment, require little maintenance, and can travel much faster. However, maglev systems also have higher infrastructure costs and technological challenges to overcome.
The document discusses Maglev trains, which use magnetic levitation to float above the guideway and propel the train forward. Maglev trains have reached speeds over 500 km/h and have several advantages over conventional trains, such as having no friction, requiring no fuel, and being safer. However, their construction is very expensive. In conclusion, Maglev trains provide efficient high-speed travel but have high initial costs compared to traditional trains.
Maglevtrainsnew 150401040530-conversion-gate01Ashutosh Kar
ย
The document provides an overview of maglev train technology. It discusses the basic principles of magnetic levitation (maglev) including electromagnetic suspension and electrodynamic suspension. It covers how maglev trains are propelled and stabilized. The document also compares maglev trains to conventional trains and aircraft, discusses economics and existing maglev systems, and concludes with advantages and applications of maglev technology.
The document discusses electric vehicles (EVs). It defines different types of EVs, including battery electric vehicles (BEVs) which run entirely on batteries, plug-in hybrid electric vehicles (PHEVs) which can be plugged in and run partly on batteries, and hybrid electric vehicles (HEVs) which cannot be plugged in. It provides details on how each type works and its pros and cons. It also discusses the history of EVs, components of EVs like batteries and motors, EV infrastructure including charging stations, and high performance EVs like the NIO EP9 that can reach speeds up to 194 mph.
The document discusses magnetic levitation (Maglev) trains. It begins by defining Maglev as using magnetic levitation to suspend, guide, and propel trains using magnets. It then explains the basic principles of levitation, propulsion, and lateral guidance that Maglev trains use to operate at high speeds. This includes using magnets to levitate the train 10 cm above the track and linear motors in the guideway to propel the train electromagnetically. The document also discusses the technologies, merits, and demographics of existing and planned Maglev systems around the world.
Maglev trains use magnetic levitation to float above the guideway and magnetic propulsion for movement. There are two main types - electromagnetic suspension (EMS) which uses electromagnets and electrodynamic suspension (EDS) which uses superconducting magnets. EMS systems can operate at lower speeds while EDS can reach over 500km/hr. Maglev trains have advantages over conventional trains like higher speeds, less maintenance, and better efficiency. However, their initial costs are very high. Existing operational maglev systems include the Shanghai Maglev Train and Linimo train in Japan.
The document discusses high speed rail systems. It defines high speed rail as trains that travel significantly faster than traditional rail, using specialized rolling stock and dedicated tracks. It notes that while definitions vary, trains over 250 km/h are widely considered high speed. The first high speed rail system began in Japan in 1964, known as the Shinkansen or bullet train. High speed rail has since been successful in several European countries as well.
This document is a seminar report on magnetic levitation trains submitted by Anuj Bansal to partial fulfillment of a Bachelor of Technology degree in electrical engineering. The report contains an introduction to magnetic levitation technology, different types of magnetic levitation including permanent magnet, electromagnetic, and electrodynamic types. It discusses the working principles of levitation, propulsion, stability, and guidance of maglev trains and compares maglev trains to conventional aircraft and trains.
This document discusses magnetic levitation trains (Maglev trains). It describes two main types of Maglev trains: electromagnetic suspension (EMS) and electrodynamic suspension (EDS). EMS uses electromagnets to attract the train to the track for levitation and propulsion, while EDS uses superconducting magnets and repulsion for levitation. The document outlines the basic principles, pros and cons of each system and concludes that Maglev trains offer a more efficient transportation alternative with advantages like very high speeds and less environmental impact.
This document provides an overview of magnetic levitation and its applications. It discusses various methods for achieving stable magnetic levitation, including mechanical constraints, diamagnetic levitation using superconductors, and servo stabilization. Applications covered include magnetic bearings, which reduce friction in machines by levitating rotating components, and maglev trains, which use magnetic levitation for contactless high-speed transportation. The document also outlines challenges such as instability based on Earnshaw's theorem and the need for continuous power input in active magnetic bearing systems.
- The objective of this project is to make a smart solar panel which is follow the sun light. Solar panel converts sun light into electricity. It is eco-friendly and low-cost energy. But the solar panel is unable to move in front of the light source, hence solar panel not produces electricity of its full capacity. Solar panel is unable to move, it is fixed at one position. If we want full energy output from solar panel thenwe need to move manualy solar panel in front of the sun light
In this project,
This report aims to let the reader understand the project work which I have done. A brief introduction to Solar Panel and Solar Tracker is explained in the Literature Research section. Basically the Solar Tracker is divided into two main categories, hardware and software. It is further subdivided into six main functionalities: Method of Tracker Mount, Drives, Sensors, Motors, Data Acquisition/Interface Card and Power Supply of the Solar Tracker is also explained and explored. The reader would then be brief with some analysis and perceptions of the information.
This document summarizes a seminar presentation on Maglev trains. It introduces Maglev trains as trains that levitate and are propelled using magnetic fields rather than wheels. The document then covers the basic principles of Maglev train operation including levitation, propulsion and guidance. It discusses the two main types of Maglev technologies - electromagnetic suspension and electrodynamic suspension. The document also compares Maglev trains to conventional trains and discusses their economics, existing implementations and concludes with references.
This document discusses wireless charging for electric vehicles. It begins by introducing electric vehicles and the need for alternatives to traditional charging systems due to challenges like battery weight and charging time. It then discusses wireless charging, how it works using inductive coupling between transmitting and receiving pads. The document reviews the history of wireless power transmission dating back to Nikola Tesla's experiments. It also covers how wireless charging roads would be constructed and advantages like reduced operating costs and pollution. Disadvantages include high installation costs and limited range. The document concludes that wireless charging is a viable solution that could reduce energy usage and dependence on wired systems.
Ppt on project_ELECTOMAGNETIC_BRAKING_SYSTEMANUPAM SINGH
ย
This document summarizes the design and fabrication of an advanced electromagnetic braking system. The system uses electromagnetic induction and eddy currents to brake a rotating metallic wheel. When current passes through an electromagnetic coil, it produces a magnetic flux that attracts a brake shoe and applies braking force. This project aims to develop an alternative braking system that has low maintenance costs, reduces noise, and is safer than conventional friction brakes. The document outlines the methodology, working principles, design process, materials used, applications, and conclusions of the project.
This document discusses electric locomotives. It begins with an introduction defining an electric locomotive and providing a brief history of electric trains in India starting in 1925. It then describes the main traction systems used in electric locomotives including DC, single phase AC, and three phase AC systems. Key parts of an AC electric locomotive are outlined such as the pantograph, transformer, rectifier and inverter. India's first high-powered electric locomotive assembled in Bihar is highlighted with details about its horsepower, speed and IGBT-based propulsion technology. Advantages and future scope of electric locomotives in India are presented.
The document discusses an underwater windmill, which extracts power from tides. It has main parts including turbines, a gearbox, and generator. The turbines are installed on the ocean floor and convert kinetic tidal energy into electricity. As the tides cause water to flow, it makes the turbine rotor spin, which turns the generator via the gearbox to produce electricity. The electricity is transmitted via cables to land. While high initial costs and difficulty of installation are disadvantages, underwater windmills have benefits of being renewable, emissions-free, and having low maintenance costs.
Magnetic Levitation Train by Shaheen Galgali_seminar report finalshaheen galgali
ย
Magnetic levitation is a highly advanced technology which uses the principle of Electromagnetic suspension & Electrodynamics suspension technology. It has various uses, The common point in all applications is the lack of contact and no friction. This increases efficiency, reduces maintenance costs, and increases the useful life of the system. Magnetic levitation is a technique to suspend an object without any support other than that of a magnetic field. There are already many countries that are attracted to maglev system. Many system have been proposed in different parts of the worlds. Maglev can be conveniently considered as a solution for the future needs of the world. This contribution deals with magnetic levitation. An overview of types, principles and working of magnetic levitation is given with the example by train are presented.
This document discusses electric, hybrid, and fuel-cell vehicle architectures and modeling. It begins by introducing the limitations of fossil fuels and internal combustion engines, as well as the development of battery electric vehicles (BEVs), hybrid electric vehicles (HEVs), and fuel-cell vehicles (FCVs) as alternatives. It then describes the major characteristics, issues, and comparisons of BEVs, HEVs, and FCVs. The rest of the document focuses on vehicle powertrain architectures, including series, parallel, and series-parallel hybrid configurations, and methods for modeling and simulating these different vehicle types.
Magnetic levitation uses magnetic fields to levitate objects without physical contact. There are two main types of maglev trains - electromagnetic suspension (EMS) and electrodynamic suspension (EDS). EMS uses electromagnets attached to the train to attract it to the track, while EDS uses superconducting magnets on the train repelled by magnets in the track for levitation and propulsion. Maglev trains offer several advantages over conventional trains, including higher speeds, less energy usage, lower operating costs, and greater safety. Current operational maglev systems include Transrapid and the Japanese high-speed line, while future applications may include space vehicle launch and hypersonic aircraft ground testing.
The document discusses Mumbai Suburban Railways, which carries over 6.6 million passengers daily and has one of the highest passenger densities of any urban rail system. It notes strengths like being a large employer but also weaknesses like delays, overcrowding, and lack of infrastructure upgrades. It analyzes demand and capacity constraints and surveys problems reported by passengers and employees. Suggestions are made to increase frequency and capacity of trains to better meet passenger needs.
Magnetic Levitation is a method by which we can levitated an object with no support, other than magnetic field.
since it is a old theory but there still research is going on in this topic.now it is used in maglev train,maglev bearing and product display purpose.
electromagnetic braking system by Indrakumar R Padwani.pdfINDRAKUMAR PADWANI
ย
This document provides information about an electromagnetic braking system project report. It includes a title page, certificate of completion signed by faculty, an acknowledgments section thanking those who provided guidance, and an abstract summarizing the project. The project aims to create an electromagnetic braking system model capable of applying brakes without friction loss by using magnetic force and inducing eddy currents to slow rotation. It also includes sections on introduction, literature review, problem definition, block diagram, design, construction, parts, advantages/disadvantages, conclusion, and references.
This document summarizes a seminar on underwater windmills. It introduces tidal energy and how underwater windmills capture tidal energy similarly to how wind turbines capture wind energy. It discusses the history and development of tidal power projects, including early examples in France and Scotland. It describes the key components and working of underwater windmills, including horizontal and vertical axis turbine types. The document also summarizes India's tidal energy potential, particularly in Gujarat, and discusses tidal power projects planned or under development in India. It outlines some merits and challenges of tidal power, and how maintenance is performed on submerged turbines.
The document discusses plans for a bullet train project in India between Mumbai and Ahmedabad. Key points include:
1) The foundation stone for the Mumbai-Ahmedabad High Speed Railway Project was recently laid, which will introduce Japan's Shinkansen bullet train technology to India through collaboration between the two countries.
2) The bullet train will run at speeds between 250-350 km/h, covering the 505 km distance between the two cities in under 3 hours.
3) The project aims to enhance passenger connectivity and mobility while promoting Prime Minister Modi's 'Make in India' initiative through technology transfers from Japan.
This document discusses magnetic levitation (maglev) transportation systems. It describes two main types of maglev systems - electrodynamic suspension (EDS) and electromagnetic suspension (EMS). EDS uses superconducting magnets and repulsive forces, while EMS uses attractive forces between electromagnets and ferromagnetic rails. Both require levitation and propulsion systems, which are typically provided by linear induction motors or linear synchronous motors. Maglev trains can travel at very high speeds of up to 650 km/h with little friction or pollution. The document discusses the technology and considerations for maglev systems as an efficient and high-capacity mode of transportation.
This document discusses magnetic levitation (Maglev) trains. Maglev trains use magnetic fields for levitation, propulsion, and guidance instead of wheels. They can achieve very high speeds without friction. There are two main types - electromagnetic suspension which uses electromagnets, and electrodynamic suspension which uses superconductors. Current operational Maglev trains exist in Germany and Japan. Maglev trains have advantages over conventional trains like lower energy consumption, operating costs, and greater safety.
This document is a seminar report on magnetic levitation trains submitted by Anuj Bansal to partial fulfillment of a Bachelor of Technology degree in electrical engineering. The report contains an introduction to magnetic levitation technology, different types of magnetic levitation including permanent magnet, electromagnetic, and electrodynamic types. It discusses the working principles of levitation, propulsion, stability, and guidance of maglev trains and compares maglev trains to conventional aircraft and trains.
This document discusses magnetic levitation trains (Maglev trains). It describes two main types of Maglev trains: electromagnetic suspension (EMS) and electrodynamic suspension (EDS). EMS uses electromagnets to attract the train to the track for levitation and propulsion, while EDS uses superconducting magnets and repulsion for levitation. The document outlines the basic principles, pros and cons of each system and concludes that Maglev trains offer a more efficient transportation alternative with advantages like very high speeds and less environmental impact.
This document provides an overview of magnetic levitation and its applications. It discusses various methods for achieving stable magnetic levitation, including mechanical constraints, diamagnetic levitation using superconductors, and servo stabilization. Applications covered include magnetic bearings, which reduce friction in machines by levitating rotating components, and maglev trains, which use magnetic levitation for contactless high-speed transportation. The document also outlines challenges such as instability based on Earnshaw's theorem and the need for continuous power input in active magnetic bearing systems.
- The objective of this project is to make a smart solar panel which is follow the sun light. Solar panel converts sun light into electricity. It is eco-friendly and low-cost energy. But the solar panel is unable to move in front of the light source, hence solar panel not produces electricity of its full capacity. Solar panel is unable to move, it is fixed at one position. If we want full energy output from solar panel thenwe need to move manualy solar panel in front of the sun light
In this project,
This report aims to let the reader understand the project work which I have done. A brief introduction to Solar Panel and Solar Tracker is explained in the Literature Research section. Basically the Solar Tracker is divided into two main categories, hardware and software. It is further subdivided into six main functionalities: Method of Tracker Mount, Drives, Sensors, Motors, Data Acquisition/Interface Card and Power Supply of the Solar Tracker is also explained and explored. The reader would then be brief with some analysis and perceptions of the information.
This document summarizes a seminar presentation on Maglev trains. It introduces Maglev trains as trains that levitate and are propelled using magnetic fields rather than wheels. The document then covers the basic principles of Maglev train operation including levitation, propulsion and guidance. It discusses the two main types of Maglev technologies - electromagnetic suspension and electrodynamic suspension. The document also compares Maglev trains to conventional trains and discusses their economics, existing implementations and concludes with references.
This document discusses wireless charging for electric vehicles. It begins by introducing electric vehicles and the need for alternatives to traditional charging systems due to challenges like battery weight and charging time. It then discusses wireless charging, how it works using inductive coupling between transmitting and receiving pads. The document reviews the history of wireless power transmission dating back to Nikola Tesla's experiments. It also covers how wireless charging roads would be constructed and advantages like reduced operating costs and pollution. Disadvantages include high installation costs and limited range. The document concludes that wireless charging is a viable solution that could reduce energy usage and dependence on wired systems.
Ppt on project_ELECTOMAGNETIC_BRAKING_SYSTEMANUPAM SINGH
ย
This document summarizes the design and fabrication of an advanced electromagnetic braking system. The system uses electromagnetic induction and eddy currents to brake a rotating metallic wheel. When current passes through an electromagnetic coil, it produces a magnetic flux that attracts a brake shoe and applies braking force. This project aims to develop an alternative braking system that has low maintenance costs, reduces noise, and is safer than conventional friction brakes. The document outlines the methodology, working principles, design process, materials used, applications, and conclusions of the project.
This document discusses electric locomotives. It begins with an introduction defining an electric locomotive and providing a brief history of electric trains in India starting in 1925. It then describes the main traction systems used in electric locomotives including DC, single phase AC, and three phase AC systems. Key parts of an AC electric locomotive are outlined such as the pantograph, transformer, rectifier and inverter. India's first high-powered electric locomotive assembled in Bihar is highlighted with details about its horsepower, speed and IGBT-based propulsion technology. Advantages and future scope of electric locomotives in India are presented.
The document discusses an underwater windmill, which extracts power from tides. It has main parts including turbines, a gearbox, and generator. The turbines are installed on the ocean floor and convert kinetic tidal energy into electricity. As the tides cause water to flow, it makes the turbine rotor spin, which turns the generator via the gearbox to produce electricity. The electricity is transmitted via cables to land. While high initial costs and difficulty of installation are disadvantages, underwater windmills have benefits of being renewable, emissions-free, and having low maintenance costs.
Magnetic Levitation Train by Shaheen Galgali_seminar report finalshaheen galgali
ย
Magnetic levitation is a highly advanced technology which uses the principle of Electromagnetic suspension & Electrodynamics suspension technology. It has various uses, The common point in all applications is the lack of contact and no friction. This increases efficiency, reduces maintenance costs, and increases the useful life of the system. Magnetic levitation is a technique to suspend an object without any support other than that of a magnetic field. There are already many countries that are attracted to maglev system. Many system have been proposed in different parts of the worlds. Maglev can be conveniently considered as a solution for the future needs of the world. This contribution deals with magnetic levitation. An overview of types, principles and working of magnetic levitation is given with the example by train are presented.
This document discusses electric, hybrid, and fuel-cell vehicle architectures and modeling. It begins by introducing the limitations of fossil fuels and internal combustion engines, as well as the development of battery electric vehicles (BEVs), hybrid electric vehicles (HEVs), and fuel-cell vehicles (FCVs) as alternatives. It then describes the major characteristics, issues, and comparisons of BEVs, HEVs, and FCVs. The rest of the document focuses on vehicle powertrain architectures, including series, parallel, and series-parallel hybrid configurations, and methods for modeling and simulating these different vehicle types.
Magnetic levitation uses magnetic fields to levitate objects without physical contact. There are two main types of maglev trains - electromagnetic suspension (EMS) and electrodynamic suspension (EDS). EMS uses electromagnets attached to the train to attract it to the track, while EDS uses superconducting magnets on the train repelled by magnets in the track for levitation and propulsion. Maglev trains offer several advantages over conventional trains, including higher speeds, less energy usage, lower operating costs, and greater safety. Current operational maglev systems include Transrapid and the Japanese high-speed line, while future applications may include space vehicle launch and hypersonic aircraft ground testing.
The document discusses Mumbai Suburban Railways, which carries over 6.6 million passengers daily and has one of the highest passenger densities of any urban rail system. It notes strengths like being a large employer but also weaknesses like delays, overcrowding, and lack of infrastructure upgrades. It analyzes demand and capacity constraints and surveys problems reported by passengers and employees. Suggestions are made to increase frequency and capacity of trains to better meet passenger needs.
Magnetic Levitation is a method by which we can levitated an object with no support, other than magnetic field.
since it is a old theory but there still research is going on in this topic.now it is used in maglev train,maglev bearing and product display purpose.
electromagnetic braking system by Indrakumar R Padwani.pdfINDRAKUMAR PADWANI
ย
This document provides information about an electromagnetic braking system project report. It includes a title page, certificate of completion signed by faculty, an acknowledgments section thanking those who provided guidance, and an abstract summarizing the project. The project aims to create an electromagnetic braking system model capable of applying brakes without friction loss by using magnetic force and inducing eddy currents to slow rotation. It also includes sections on introduction, literature review, problem definition, block diagram, design, construction, parts, advantages/disadvantages, conclusion, and references.
This document summarizes a seminar on underwater windmills. It introduces tidal energy and how underwater windmills capture tidal energy similarly to how wind turbines capture wind energy. It discusses the history and development of tidal power projects, including early examples in France and Scotland. It describes the key components and working of underwater windmills, including horizontal and vertical axis turbine types. The document also summarizes India's tidal energy potential, particularly in Gujarat, and discusses tidal power projects planned or under development in India. It outlines some merits and challenges of tidal power, and how maintenance is performed on submerged turbines.
The document discusses plans for a bullet train project in India between Mumbai and Ahmedabad. Key points include:
1) The foundation stone for the Mumbai-Ahmedabad High Speed Railway Project was recently laid, which will introduce Japan's Shinkansen bullet train technology to India through collaboration between the two countries.
2) The bullet train will run at speeds between 250-350 km/h, covering the 505 km distance between the two cities in under 3 hours.
3) The project aims to enhance passenger connectivity and mobility while promoting Prime Minister Modi's 'Make in India' initiative through technology transfers from Japan.
This document discusses magnetic levitation (maglev) transportation systems. It describes two main types of maglev systems - electrodynamic suspension (EDS) and electromagnetic suspension (EMS). EDS uses superconducting magnets and repulsive forces, while EMS uses attractive forces between electromagnets and ferromagnetic rails. Both require levitation and propulsion systems, which are typically provided by linear induction motors or linear synchronous motors. Maglev trains can travel at very high speeds of up to 650 km/h with little friction or pollution. The document discusses the technology and considerations for maglev systems as an efficient and high-capacity mode of transportation.
This document discusses magnetic levitation (Maglev) trains. Maglev trains use magnetic fields for levitation, propulsion, and guidance instead of wheels. They can achieve very high speeds without friction. There are two main types - electromagnetic suspension which uses electromagnets, and electrodynamic suspension which uses superconductors. Current operational Maglev trains exist in Germany and Japan. Maglev trains have advantages over conventional trains like lower energy consumption, operating costs, and greater safety.
This document provides an overview of magnetic levitation (Maglev) train technology. It discusses the basic principles of Maglev trains, including electromagnetic suspension (EMS) and electrodynamic suspension (EDS). EMS uses attractive forces while EDS uses repulsive forces for levitation. Maglev trains offer advantages like high speed, low noise and friction, and reduced pollution compared to traditional trains. Current Maglev projects exist in Germany and Japan, with future projects planned in India and other applications being explored by NASA and Boeing. The conclusion discusses how Maglev trains could provide a more efficient transportation alternative with lower maintenance costs.
Brief Description regarding magnetic levitation or magnetic suspension.It is a method by which an object is suspended with no support other than magnetic fields.
Magnetic levitation uses electromagnetic forces to levitate objects without physical contact. There are two main types of maglev systems - electromagnetic suspension and electrodynamic suspension. Maglev trains employ one of these systems to levitate above a guideway using magnets on the train and track. This allows for very high speeds with less friction compared to traditional wheeled trains. However, developing large-scale maglev systems requires significant monetary investment that many countries currently cannot afford.
The document summarizes the history and development of maglev trains. It discusses how the first ideas for an electromagnetic levitation train were conceived in 1922 in Germany. The first full-scale functioning maglev train was built in 1969 by a government research project. In the late 1980s and 1990s, the Transrapid 07 maglev train was developed and set speed records, traveling over 248,000 miles by 1996. The document also describes the basic principles and differences between electromagnetic suspension (EMS) and electrodynamic suspension (EDS) systems for maglev trains.
Maglev trains use magnetic levitation to float above the track and propel itself forward, allowing it to travel at speeds over 300 mph without friction. They are nearly silent, non-polluting, and require little maintenance. The key principles are electromagnetic or electrodynamic suspension to levitate the train and superconducting magnets or linear motors for propulsion. Current systems in operation include Transrapid in Germany and the high-speed maglev in Japan. Maglev trains provide a safer, more energy efficient alternative to conventional high-speed rail.
Maglev (derived from magnetic levitation) is a transport method that uses magnetic levitation to move vehicles without touching the ground. With maglev, a vehicle travels along a guideway using magnets to create both lift and propulsion, thereby reducing friction and allowing higher speeds.Maglev trains move more smoothly and more quietly than
wheeled mass transit systems. They are relatively unaffected by
weather. The power needed for levitation is typically not a large percentage of its overall energy consumptionอพmost goes to overcome air resistance (drag), as with other highspeed transport. Maglev trains hold the speed record for rail transportation
This document discusses magnetic levitation (maglev) trains. It begins by explaining the basic principles of magnetic levitation using Faraday's Law and Lenz's Law. It then provides a brief history of maglev train development in Japan, Germany, and China. Key points include Japan building the first test track in 1975 and achieving 517 km/h, and China opening the first commercial maglev route between Shanghai airports in 2003. Advantages of maglev trains are listed as high speed, energy efficiency, lack of pollution, and less maintenance; while disadvantages include very high construction costs. The document concludes by discussing Japan's plans for a maglev train reaching 500 km/h by 2027.
This document summarizes a student project report on magnetic levitation. It describes different types of magnetic levitation systems including electromagnetic suspension and electrodynamic suspension. It discusses major applications such as maglev trains, moving metallic objects in industry, and military rail guns. The principles and mechanisms of maglev trains are explained in detail, including magnetic levitation, lateral guidance, and propulsion using electromagnetic forces.
The document discusses maglev trains, which use magnetic levitation for frictionless travel at high speeds. It describes two main types - electromagnetic suspension systems that use electromagnets for levitation and propulsion, and electrodynamic suspension systems that use superconducting magnets. Maglev trains offer advantages over conventional trains like lower energy use, operating costs, and greater safety. Current projects include operational systems in Germany and Japan, with future plans in India and other applications being explored.
This document provides a technical seminar report on Maglev trains. It discusses the two main types of magnetic levitation systems used - electromagnetic suspension and electrodynamic suspension. Electromagnetic suspension uses electromagnets on the train that are attracted to a ferromagnetic guide rail, lifting the train above the track. Electrodynamic suspension uses superconducting magnets on the train that are repelled by magnets in the track, allowing the train to float without physical contact. The document also briefly introduces a third potential system called Inductrack that is in development.
This document provides an overview of magnetic levitation technology. It discusses the history of maglev dating back to experiments in the 18th century. It describes how maglev works using magnetic fields rather than wheels to lift and propel trains, eliminating friction. This greatly improves efficiency compared to traditional trains. The document outlines the principles of electromagnetic and electrodynamic suspension used in maglev and discusses applications for high-speed ground transportation and launching space vehicles. Benefits of maglev include lower operating costs, reduced energy usage, improved safety, and less environmental impact over other modes of transport.
Maglev trains are the fastest trains in the world! Maglev is short for magnetic levitation which basic principles involve the use of magnetism to levitate an object.
Science project on Maglev Trains By Ardhenduardhendu03
ย
This document discusses a science project about maglev trains. It begins by defining maglev trains as using magnetic levitation to move vehicles along a guideway without touching the ground. It then provides details on the history and development of maglev technology, describing early patents from the 1900s and the first commercial maglev system introduced in 1984 in Birmingham, England. The document also explains the key technologies behind maglev trains, including electromagnetic and electrodynamic suspension systems as well as linear motor propulsion. It compares maglev trains to conventional trains and notes maglev's benefits like higher potential speeds, less noise, and reduced maintenance needs.
1. Magnetic levitation uses magnetic fields to levitate metallic objects and can be achieved through ferromagnetism or diamagnetism.
2. The most important application is trans-rapid magnetic levitation trains, which are propelled by electromagnetic or electrodynamic suspension.
3. Maglev trains offer advantages like very high speeds, low friction, and earthquake resistance since they levitate a few centimeters above the track. Current operational systems include ones in Germany and Japan.
Maglev, or magnetic levitation, is a transportation system that uses magnetic fields to levitate, guide and propel vehicles such as trains at high speeds without making contact with the guideway. Maglev trains can travel at speeds over 300 mph. Maglev works by using magnets to both levitate the train above the guideway and propel it using linear induction motors or linear synchronous motors. Maglev trains have benefits like very high speeds, low energy usage, nearly silent operation, very low maintenance costs and improved safety over conventional trains. Current maglev projects exist in Germany, Japan and other countries to develop this promising transportation technology.
Maglev trains use electromagnetic force to levitate above the track and propel the train forward at high speeds without friction. They have the potential to reach speeds comparable to aircraft of 500 to 580 km/h. While maglev trains offer safety and efficiency advantages over conventional trains, their construction costs are very high. Recent government funding in countries like China and Japan support expanding maglev networks, but high costs remain a challenge for widespread adoption of the technology.
The document discusses the principles and operation of maglev trains. It begins by providing a brief history of steam locomotives and their increasing speeds over time. Maglev trains levitate above tracks using magnetic fields and have no contact with the tracks. There are two main types - electromagnetic suspension (EMS) which uses attractive forces, and electrodynamic suspension (EDS) which uses repulsive forces between magnets on the train and guideway. Propulsion is provided by linear induction motors or synchronous motors that accelerate the train. Lateral guidance is achieved through the shape and positioning of levitation magnets and rails. Key advantages of maglev trains include very high speeds, low noise, minimal pollution and energy use.
MagLev trains use magnetic levitation to travel without wheels along guideways. They can reach very high speeds due to the lack of friction. The first MagLev train was developed in Japan in the 1970s and reached over 300 mph. There are two main types of magnetic levitation - electromagnetic suspension which uses attractive magnetic forces, and electrodynamic suspension which uses repulsive magnetic forces. MagLev trains have advantages over other forms of transportation in that they use less energy, have lower operating costs, and are much safer.
Philippine Edukasyong Pantahanan at Pangkabuhayan (EPP) CurriculumMJDuyan
ย
(๐๐๐ ๐๐๐) (๐๐๐ฌ๐ฌ๐จ๐ง ๐)-๐๐ซ๐๐ฅ๐ข๐ฆ๐ฌ
๐๐ข๐ฌ๐๐ฎ๐ฌ๐ฌ ๐ญ๐ก๐ ๐๐๐ ๐๐ฎ๐ซ๐ซ๐ข๐๐ฎ๐ฅ๐ฎ๐ฆ ๐ข๐ง ๐ญ๐ก๐ ๐๐ก๐ข๐ฅ๐ข๐ฉ๐ฉ๐ข๐ง๐๐ฌ:
- Understand the goals and objectives of the Edukasyong Pantahanan at Pangkabuhayan (EPP) curriculum, recognizing its importance in fostering practical life skills and values among students. Students will also be able to identify the key components and subjects covered, such as agriculture, home economics, industrial arts, and information and communication technology.
๐๐ฑ๐ฉ๐ฅ๐๐ข๐ง ๐ญ๐ก๐ ๐๐๐ญ๐ฎ๐ซ๐ ๐๐ง๐ ๐๐๐จ๐ฉ๐ ๐จ๐ ๐๐ง ๐๐ง๐ญ๐ซ๐๐ฉ๐ซ๐๐ง๐๐ฎ๐ซ:
-Define entrepreneurship, distinguishing it from general business activities by emphasizing its focus on innovation, risk-taking, and value creation. Students will describe the characteristics and traits of successful entrepreneurs, including their roles and responsibilities, and discuss the broader economic and social impacts of entrepreneurial activities on both local and global scales.
How Barcodes Can Be Leveraged Within Odoo 17Celine George
ย
In this presentation, we will explore how barcodes can be leveraged within Odoo 17 to streamline our manufacturing processes. We will cover the configuration steps, how to utilize barcodes in different manufacturing scenarios, and the overall benefits of implementing this technology.
Andreas Schleicher presents PISA 2022 Volume III - Creative Thinking - 18 Jun...EduSkills OECD
ย
Andreas Schleicher, Director of Education and Skills at the OECD presents at the launch of PISA 2022 Volume III - Creative Minds, Creative Schools on 18 June 2024.
Level 3 NCEA - NZ: A Nation In the Making 1872 - 1900 SML.pptHenry Hollis
ย
The History of NZ 1870-1900.
Making of a Nation.
From the NZ Wars to Liberals,
Richard Seddon, George Grey,
Social Laboratory, New Zealand,
Confiscations, Kotahitanga, Kingitanga, Parliament, Suffrage, Repudiation, Economic Change, Agriculture, Gold Mining, Timber, Flax, Sheep, Dairying,
This presentation was provided by Racquel Jemison, Ph.D., Christina MacLaughlin, Ph.D., and Paulomi Majumder. Ph.D., all of the American Chemical Society, for the second session of NISO's 2024 Training Series "DEIA in the Scholarly Landscape." Session Two: 'Expanding Pathways to Publishing Careers,' was held June 13, 2024.
THE SACRIFICE HOW PRO-PALESTINE PROTESTS STUDENTS ARE SACRIFICING TO CHANGE T...indexPub
ย
The recent surge in pro-Palestine student activism has prompted significant responses from universities, ranging from negotiations and divestment commitments to increased transparency about investments in companies supporting the war on Gaza. This activism has led to the cessation of student encampments but also highlighted the substantial sacrifices made by students, including academic disruptions and personal risks. The primary drivers of these protests are poor university administration, lack of transparency, and inadequate communication between officials and students. This study examines the profound emotional, psychological, and professional impacts on students engaged in pro-Palestine protests, focusing on Generation Z's (Gen-Z) activism dynamics. This paper explores the significant sacrifices made by these students and even the professors supporting the pro-Palestine movement, with a focus on recent global movements. Through an in-depth analysis of printed and electronic media, the study examines the impacts of these sacrifices on the academic and personal lives of those involved. The paper highlights examples from various universities, demonstrating student activism's long-term and short-term effects, including disciplinary actions, social backlash, and career implications. The researchers also explore the broader implications of student sacrifices. The findings reveal that these sacrifices are driven by a profound commitment to justice and human rights, and are influenced by the increasing availability of information, peer interactions, and personal convictions. The study also discusses the broader implications of this activism, comparing it to historical precedents and assessing its potential to influence policy and public opinion. The emotional and psychological toll on student activists is significant, but their sense of purpose and community support mitigates some of these challenges. However, the researchers call for acknowledging the broader Impact of these sacrifices on the future global movement of FreePalestine.
2. 2
Abstract
This paper โDriving without wheels, Flying without wingsโ deals with the present
scenario of magnetic levitation (maglev) with Linear induction motor (LIM) .The magnetically
levitated train has no wheels, but floats-- or surfs-- on an electromagnetic wave, enabling rides at
330 miles per hour. By employing no wheels, maglev eliminates the friction, and concomitant heat,
associated with conventional wheel-on-rail train configurations. There are two basic types of non-
contact Maglev systems Electro Dynamic Suspension (EDS), and Electro Magnetic Suspension
(EMS). EDS is commonly known as "Repulsive Levitation," and EMS is commonly known as
"Attractive Levitation." Each type of Maglev system requires propulsion as well as "levitation."
The various projects above use different techniques for propulsion, but they are all variations of the
Linear Induction Motor (LIM) or Linear Synchronous Motor (LSM).The conversion to a linear
geometry has a far greater effect on induction motor performance than on that of synchronous
motors. The cost of making the guideway is a high percentage of the total investment for a maglev
system. The comparison looks even better for maglev when the terrain becomes difficult. Many of
the tunnels, embankments, and cuttings necessary for roads and railroads are avoided because
maglev guideways can be easily adapted to the topography. The Maglev system requires a slightly
larger start-up capital construction cost, its operating cost-- because it deploys electricity in
electromagnets in an extraordinarily efficient manner, rather than using as a fuel source coal, gas or
oil-- can be one-half that of conventional rail. The crucial point is that maglev will set off a
transportation and broader scientific explosion.
Key words: Magnetic levitation , Levitation , Propulsion , Linear induction motor(LIM).
3. 3
Introduction:
Air flights are and will remain beyond the reach of a major section of society,
particularly in India. Moreover there are problems of wastage of time in air traffic delays and
growing safety concerns. Trends in increased mobility of large masses with changing lifestyle for
more comfort are leading to congestion on roads with automobiles. Besides, increasing pollution
levels from automobiles, depleting fuel resources, critical dependence on the fuel import and due to
a limited range of mobility of buses and cars the need for fast and reliable transportation is
increasing throughout the world. High-speed rail has been the solution for many countries. Trains
are fast, comfortable, and energy-efficient and magnetic levitation may be an even better solution.
Development of magnetic levitated transport systems is under progress in developed countries and
it is just a matter of time they make inroads to India as well. Therefore, it will be interesting to
know about the science and technology behind mass ground transport system known as "magnetic
flight".
A LITTLE HISTORY
In 1922 a German engineer named Hermann Kemper recorded his first ideas for an electromagnetic
levitation train. He received a patent in 1934 and one year later demonstrated the first functioning
model. It wasn't until 1969, however, that a government-sponsored research project built the first
full scale functioning Transrapid 01. The first passenger Maglev followed a few years later and
carried people a few thousand feet at speeds up to 50 mph. The company, Munich's KraussMaffei,
which built the first Transrapid, continued to build improved versions in a combined public-private
research effort and completed Transrapid 02 in 1971, TR 03 in 1972 and TR 04 in 1973. The
Transrapid 04 Transrapid 05 carried 50,000 visitors between parking and exhibition halls for six
months.
A test center, including a 19-mile figure "eight" test track, was erected between the years of 1979
and 1987 in North Germany. Going into service with the new test facility in 1979 was the vehicle
Transrapid 06. This vehicle reached a speed of 221mph shortly after the completion of the first 13-
mile section of track. With the completion of the track, the TR 06 eventually achieved a speed of
256 mph, traveling some 40,000miles before being retired in 1990. Through the continuous testing
and refinements on the TR 06, it became possible to build the next generation vehicle Transrapid
07, built by the Thyssen Co. in Kassel. Since 1989, the Transrapid 07 has been the workhorse
reaching the record speed of 280 mph and traveling some some 248,000 miles by the end of
1996.The most significant milestone was reached in 1991 when the Transrapid system received its
certification certification of commercial worthiness.
4. 4
Principle Of Operation:
Imagine that two bar magnets are suspended one above the other with like poles (two north poles or
two south poles) directly above and below each other. Any effort to bring these two magnets into
contact with each other will have to overcome the force of repulsion that exists between two like
magnetic poles. The strength of that force of repulsion depends, among other things, on the strength
of the magnetic field between the two bar magnets. The stronger the magnet field, the stronger the
force of repulsion.
If one were to repeat this experiment using a very small, very light bar magnet as the upper member
of the pair, one could imagine that the force of repulsion would be sufficient to hold the smaller
magnet suspendedโlevitatedโin air. This example illustrates the principle that the force of
repulsion between the two magnets is able to keep the upper object suspended in air.
In fact, the force of repulsion between two bar magnets would be too small to produce the effect
described here. In actual experiments with magnetic levitation, the phenomenon is produced by
magnetic fields obtained from electromagnets. For example, imagine that a metal ring is fitted
loosely around a cylindrical metal core attached to an external source of electrical current. When
current flows through the core, it sets up a magnetic field within the core. That magnetic field, in
turn, sets up a current in the metal ring which produces its own magnetic field. According to Lenz's
law, the two magnetic fields thus producedโone in the metal core and one in the metal ringโhave
opposing polarities. The effect one observes in such an experiment is that the metal ring rises
upward along the metal core as the two parts of the system are repelled by each other. If the current
is increased to a sufficient level, the ring can actually be caused to fly upward off the core.
Alternatively, the current can be adjusted so that the ring can be held in suspension at any given
height with relation to the core.
MAGNETIC LEVIATION:
Magnetic levitation transport, or maglev, is a form of transportation that suspends, guides and
propels vehicles via electromagnetic force. This method can be faster and more comfortable than
wheeled mass transit systems. Maglevs could potentially reach velocities comparable to turboprop
and jet aircraft (500 to 580 km/h). Since much of a Maglev's propulsion system is in the track rather
than the vehicle, Maglev trains are lighter and can ascend steeper slopes than conventional trains.
They can be supported on lightweight elevated tracks. Maglevs have operated commercially since
1984. However, scientific and economic limitations have hindered the proliferation of the
technology.
5. 5
Magnetic levitation is the use of magnetic fields to levitate a (usually) metallic object. Manipulating
magnetic fields and controlling their forces can levitate an object. In this process an object is
suspended above another with no other support but magnetic fields. The electromagnetic force is
used to counteract the effects of gravitation. . The forces acting on an object in any combination of
gravitational, electrostatic, and magnetostatic fields will make the object's position unstable. The
reason a permanent magnet suspended above another magnet is unstable is because the levitated
magnet will easily overturn and the force will become attractive. If the levitated magnet is rotated,
the gyroscopic forces can prevent the magnet from overturning. Several possibilities exist to make
levitation viable.
It is possible to levitate superconductors and other diamagnetic materials, which magnetize in the
opposite sense to a magnetic field in which they are placed. A superconductor is perfectly
diamagnetic which means it expels a magnetic field (Meissner-Ochsenfeld effect). Other
diamagnetic materials are common place and can also be levitated in a magnetic field if it is strong
enough. Diamagnetism is a very weak form of magnetism that is only exhibited in the presence of
an external magnetic field. The induced magnetic moment is very small and in a direction opposite
to that of the applied field. When placed between the poles of a strong electromagnet, diamagnetic
materials are attracted towards regions where the magnetic field is weak. Diamagnetism can be used
to levitate light pieces of pyrolytic graphite or bismuth above a moderately strong permanent
magnet. As Superconductors are perfect diamagnets and when placed in an external magnetic field
expel the field lines from their interiors (better than a diamagnet). The magnet is held at a fixed
distance from the superconductor or vice versa. This is the principle in place behind EDS
(electrodynamic suspension) maglev trains. The EDS system relies on superconducting magnets.
A maglev is a train, which is suspended in air above the track, and propelled forward using
magnetism. Because of the lack of physical contact between the track and vehicle, the only friction
is that between the carriages and air. So maglev trains can travel at very high speeds (650 km/h)
with reasonable energy consumption and noise levels.
Due to the lack of physical contact between the track and the vehicle, the only friction exerted is
6. 6
that between the vehicles and the air. If it were the case that air-resistance were only a minor form
of friction, it would be appropriate to say "Consequently maglevs can potentially travel at very high
speeds with reasonable energy consumption and noise levels. Systems have been proposed that
operate at up to 650 km/h (404 mph), which is far faster than is practical with conventional rail
transport". But this is not true. In an ordinary high speed train, most of the friction is air resistance.
The power consumption per passenger-km of the Transrapid Maglev train at 200 km/h is only 24%
less than the ICE at 200 km/h (22 W per seat-km, compared to 29 W per seat-km). The very high
maximum speed potential of maglevs make them competitors to airline routes of 1,000 kilometers
(600 miles) or less
levitation
Each type of Maglev system requires propulsion as well as "levitation." The various projects below
use different techniques for propulsion. The first thing a maglev system must do is get off the
ground, and then stay suspended off the ground. This is achieved by the electromagnetic levitation
system.
Another experimental technology, which was designed, proven mathematically, peer reviewed, and
patented, but is yet to be built, is the magnetodynamic suspension (MDS), which uses the attractive
magnetic force of a permanent magnet array near a steel track to lift the train and hold it in place.
Other technologies such as repulsive permanent magnets and superconducting magnets have seen
some research.
In current electromagnetic suspension (EMS) systems, the train levitates above a steel rail while
electromagnets, attached to the train, are oriented toward the rail from below. The system is
typically arranged on a series of C-shaped arms, with the upper portion of the arm attached to the
vehicle, and the lower inside edge containing the magnets. The rail is situated between the upper
and lower edges.
Magnetic attraction varies with the cube of distance, so minor changes in distance between the
magnets and the rail produce greatly varying forces. These changes in force are dynamically
unstable - if there is a slight divergence from the optimum position, the tendency will be to
exacerbate this, and complex systems of feedback control are required to maintain a train at a
constant distance from the track, (approximately 15 millimeters (0.6 in)).[21][22]
The major advantage to suspended maglev systems is that they work at all speeds, unlike
electrodynamic systems (see below) which only work at a minimum speed of about 30 km/h. This
Electromagnetic suspension:
7. ELECTRODYNAMIC
GuiOOway levttatiool
P,OjlUlsionModules
7
The principal two systems: EMS- attractive and EDS-repulsive, respectively.
In the EMS-attractive system, the electromagnets which do the work of levitation are attached on
the top side of a casing that extends below and then curves back up to the rail that is in the center of
the track. The rail, which is in the shape of an inverted T, is a ferromagnetic rail. When a current is
passed through it, and the electromagnet switched on, there is attraction, and the levitation
electromagnets, which are below the rail, raise up to meet the rail. The car levitates. The gap
between the bottom of the vehicle and the rail is only 3/8" and an electronic monitoring system, by
controlling the amount of attractive force, must closely control the size of the gap.
eliminates the need for a separate low-speed suspension system, and can simplify the track layout as
a result. On the downside, the dynamic instability of the system demands high tolerances of the
track, which can offset, or eliminate this advantage. Laithwaite, highly skeptical of the concept, was
concerned that in order to make a track with the required tolerances, the gap between the magnets
and rail would have to be increased to the point where the magnets would be unreasonably large. In
practice, this problem was addressed through increased performance of the feedback systems, which
allow the system to run with close tolerances
8. 8
Electrodynamic suspension
EDS Maglev Propulsion via propulsion coils
In electrodynamic suspension (EDS), both the rail and the train exert a magnetic field, and the train
is levitated by the repulsive force between these magnetic fields. The magnetic field in the train is
produced by either electromagnets (as in JR-Maglev) or by an array of permanent magnets (as in
Inductrack). The repulsive force in the track is created by an induced magnetic field in wires or
other conducting strips in the track. A major advantage of the repulsive maglev systems is that they
are naturally stable - minor narrowing in distance between the track and the magnets create strong
forces to repel the magnets back to their original position, while a slight increase in distance greatly
reduced the force and again returns the vehicle to the right separation. No feedback control is
needed.
Repulsive systems have a major downside as well. At slow speeds, the current induced in these
coils and the resultant magnetic flux is not large enough to support the weight of the train. For this
reason the train must have wheels or some other form of landing gear to support the train until it
reaches a speed that can sustain levitation. Since a train may stop at any location, due to equipment
problems for instance, the entire track must be able to support both low-speed and high-speed
operation. Another downside is that the repulsive system naturally creates a field in the track in
front and to the rear of the lift magnets, which act against the magnets and create a form of drag.
This is generally only a concern at low speeds, at higher speeds the effect does not have time to
build to its full potential and other forms of drag dominate.
9. 9
In the EDS-repulsive system, the superconducting magnets (SCMs), which do the levitating of the
vehicle, are at the bottom of the vehicle, but above the track. The track or roadway is either an
aluminum guideway or a set of conductive coils. The magnetic field of the superconducting
magnets aboard the maglev vehicle induces an eddy current in the guideway. The polarity of the
eddy current is same as the polarity of the SCMs onboard the vehicle. Repulsion results, "pushing"
the vehicle away and thus up from the track. The gap between vehicle and guideway in the EDS-
system is considerably wider, at 1 to 7 inches, and is also regulated (by a null-flux system). Thus,
the guideway is not below, but out to the sides. Now the repulsion goes perpendicularly outward
from the vehicle to the coils in the guidewalls. The perpendicular repulsion still provides lift.
The drag force can be used to the electrodynamic system's advantage, however, as it creates a
varying force in the rails that can be used as a reactionary system to drive the train, without the need
for a separate reaction plate, as in most linear motor systems. Laithwaite led development of such
"traverse-flux" systems at his Imperial College lab Alternately, propulsion coils on the guideway
are used to exert a force on the magnets in the train and make the train move forward. The
propulsion coils that exert a force on the train are effectively a linear motor: an alternating current
flowing through the coils generates a continuously varying magnetic field that moves forward along
the track. The frequency of the alternating current is synchronized to match the speed of the train.
The offset between the field exerted by magnets on the train and the applied field creates a force
moving the train forward.
10. 10
One of the HSST's unique technical features is modules that correspond to the bogies on
connectional rolling stock. Figure shows each consist primarily of a member of electromagnets for
levitation guidance, a linear motor for propulsion and braking, and a hydraulic break system.
The two modules on the left and right sides of the car connected beams and this unit is called
levitation bogie because the levitation bogies run the entire length of the car, the load car and load
on guide way are spread out and the advantages of magnetic levitation can be fully exploited.
Linear induction motor (LIM) in magnetic levitation
The High Speed Surface Transport (HSST) system is propelled by linear induction motor. The
HSST primary coils are attached to the carriage body and the track configuration is simple,
using the steel rails and aluminum reaction plates. The HSST levitation system uses
ordinary electromagnets that exerts an attractive force and levitate the vehicle. The
electro-magnets are attached to the car, but are positioned facing the under side of the guide
way's steel rails. They provide an attractive force from below, levitating the car.
This attractive force is controlled by a gap sensor that measures the distance between
the rails and electromagnets. A control circuit continually regulates the current to the
electro-magnet , ensuring that the gap remains at a fixed distance of about 8 mm, the current is
decreased. This action is computer controlled at 4000 times per second to ensure the levitation.
As shown in figure, the levitation magnets and rail are both U shaped (with rail being an
inverted U). The mouths of U face one another. This configuration ensures that when ever
a levitational force is exerted, a lateral guidance force occurs as well. If the electromagnet starts
to shift laterally from the center of the rail, the lateral guidance force is exerted in proportion to
the extent of the shift, bringing the electromagnet back into alignment. The use of an
electro-magnetic attractive force to both levitate and guide the car is a significant feature of HSST
the system
illustrates in the HSST, the primary side coils of motor are attached to the car body in
the secondary side reaction plates are installed along the guide way .this component acts as
induction motor and ensures both propulsion and breaking force without any contact between car
and guide way. This system a car mounted primary linear induction system. The ground
side requires only a steel plate backed by an aluminum or copper plate, meaning that the
rail source is simple.
11. BenefitsofMagneticLevitated Transportationsystem:
* Maglev uses 30% less energy than a high-speed train traveling at the same speed (1/3 more power
for the same amount of energy).
* The operating costs of a maglev system are approximately half that of conventional long-distance
railroads.
* Research has shown that the maglev is about 20 times safer than airplanes, 250 times safer than
conventional railroads, and 700 times safer than automobile travel.
* Despite the speeds up to 500 km/hour, passengers can move about freely in the vehicles at all
times.
* Maglev vehicle carries no fuel to increase fire hazard
* The materials used to construct maglev vehicles are non-combustible, poor transmitters of heat,
and able to withstand fire penetration.
* In the unlikely event that a fire and power loss occurred simultaneously, the vehicle is
automatically slowed down so that it stops at a predefined emergency power station.
* A collision between two maglev trains is nearly impossible because the linear induction motors
prevent trains running in opposite directions or different speeds within the same power section.
* Unlike conventional transportation systems in which a vehicle has to carry the total power needed
for the most demanding sections, the power of the maglev motor is dependent on the local
conditions such as flat or uphill grades.
11
Current Projects:
Germany and Japan have been the pioneering countries in MagLev research. Currently operational
systems include Transrapid (Germany) and High Speed Surface Transport (Japan). There are
several other projects under scrutiny such as the SwissMetro, Seraphim and Inductrack. All have to
do with personal rapid transit.
India
Pune (Pimple Saudagar) โ Mumbai (Panvel): The Indian Ministry is currently in the process of
reviewing a proposal to start a Maglev train system in India. It has already been estimated that the
cost to complete this process would be over $30 Billion
12. Boones and Banes:
BOONS:
Maintenance: Because the train floats along there is no contact with the ground and therefore no
need for any moving parts. As a result there are no components that would wear out. This means in
theory trains and track would need no maintenance at all.
Friction: Because maglev trains float, there is no friction. Note that there will still be air resistance
Less noise: because there are no wheels running along there is no wheel noise. However noise due
to air disturbance still occurs.
Speed: As a result of the three previous listed it is more viable for maglev trains to travel extremely
fast, i.e. 500km/h or 300mph
BANES:
1. Maglev guide paths are bound to be more costly than conventional steel railways.
2. The other main disadvantage is lack with existing infrastructure. For example if a high speed
line between two cities it built, then high speed trains can serve both cities but more
importantly they can serve other nearby cities by running on normal railways that branch off
the high speed line. The high speed trains could go for a fast run on the high speed line, and
then come off it for the rest of the journey. Maglev trains wouldn't be able to do that; they
would be limited to where maglev lines run. This would mean it would be very difficult to
make construction of maglev lines commercially viable unless there were two very large
destinations being connected. The fact that a maglev train will not be able to continue
beyond its track may seriously hinder its usefulness.
.
COMPARISION:
Compared to conventional trains
Backwards Compatibility Maglev trains currently in operation are not compatible with conventional
track, and therefore require all new infrastructure for their entire route. By contrast conventional
high speed trains such as the TGV are able to run at reduced speeds on existing rail infrastructure,
thus reducing expenditure where new infrastructure would be particularly expensive (such as the
final approaches to city terminals), or on extensions where traffic does not justify new
infrastructure.
Major comparative differences between the two technologies lie in backward-compatibility, rolling
resistance, weight, noise, design constraints, and control systems.
13
13. Weight The weight of the large electromagnets in many EMS and EDS designs is a major design
issue. A very strong magnetic field is required to levitate a massive train. For this reason one
research path is using superconductors to improve the efficiency of the electromagnets, and the
energy cost of maintaining the field.
Design Comparisons Braking and overhead wire wear have caused problems for the Fastech 360
railed Shinkansen. Maglev would eliminate these issues. Magnet reliability at higher temperatures is
a countervailing comparative disadvantage (see suspension types), but new alloys and
manufacturing techniques have resulted in magnets that maintain their levitational force at higher
temperatures.
As with many technologies, advances in linear motor design have addressed the limitations noted in
early maglev systems. As linear motors must fit within or straddle their track over the full length of
the train, track design for some EDS and EMS maglev systems is challenging for anything other
than point-to-point services. Curves must be gentle, while switches are very long and need care to
avoid breaks in current. An SPM maglev system, in which the vehicle permanently levitated over
the tracks, can instantaneously switch tracks using electronic controls, with no moving parts in the
track. A prototype SPM maglev train has also navigated curves with radius equal to the length of
the train itself, which indciates that a full-scale train should be able to navigate curves with the same
or narrower radius as a conventional train.
Control Systems EMS Maglev needs very fast-responding control systems to maintain a stable
height above the track; this needs careful design in the event of a failure in order to avoid crashing
into the track during a power fluctuation. Other maglev systems do not necessarily have this
problem. For example, SPM maglev systems have a stable levitation gap of several centimeters.
14
Noise. Because the major source of noise of a maglev train comes from displaced air, maglev trains
produce less noise than a conventional train at equivalent speeds. However, the psychoacoustic
profile of the maglev may reduce this benefit: A study concluded that maglev noise should be rated
like road traffic while conventional trains have a 5-10 dB "bonus" as they are found less annoying
at the same loudness level.
Efficiency Due to the lack of physical contact between the track and the vehicle, maglev trains
experience no rolling resistance, leaving only air resistance and electromagnetic drag, potentially
improving power efficiency.
14. Compared to aircraft
For many systems, it is possible to define a lift-to-drag ratio. For maglev systems these ratios can
exceed that of aircraft (for example Inductrack can approach 200:1 at high speed, far higher than
any aircraft). This can make maglev more efficient per kilometre. However, at high cruising speeds,
aerodynamic drag is much larger than lift-induced drag. Jet transport aircraft take advantage of low
air density at high altitudes to significantly reduce drag during cruise, hence despite their lift-to-
drag ratio disadvantage, they can travel more efficiently at high speeds than maglev trains that
operate at sea level (this has been proposed to be fixed by the vactrain concept). Aircraft are also
more flexible and can service more destinations with provision of suitable airport facilities.
Unlike airplanes, maglev trains are powered by electricity and thus need not carry fuel. Aircraft fuel
is a significant danger during takeoff and landing accidents. Also, electric trains emit little carbon
dioxide emissions, especially when powered by nuclear or renewable sources.
The MagLev Train: Research on this โdream trainโ has been going on for the last 30 odd years in
various parts of the world. The chief advantages of this type of train are: 1. Non-contact and non-
wearing propulsion, independent of friction, no mechanical components like wheel, axle.
Maintenance costs decrease. Low noise emission and vibrations at all speeds(again due to non-
contact nature). Low specific energy consumption. Faster turnaround times, which means fewer
vehicles. All in all, low operating costs. Speeds of up to 500kmph.. Low pollutant emissions. Hence
environmentally friendly.
The MagLev offers a cheap, efficient alternative to the current rail system. A country like India
could benefit very much if this were implemented here. Further possible applications need to be
explored.
Conclusion
NASA plans to use magnetic levitation for launching of space vehicles into low earth orbit. Boeing
is pursuing research in MagLev to provide a Hypersonic Ground Test Facility for the Air Force.
The mining industry will also benefit from MagLev. There are probably many more undiscovered
applications
Other Applications:
15