Eds is used for maglev trains, such as the japanese scmaglev. The inductrack approach to magnetic levitation unt. The track can be in one of two configurations, a ladder track and a laminated track. Dec 23, 2005 the study noted, however, that the inductrack s energy usage and maintenance costs would be significantly lower than those of a conventional railway. The magnet configuration of claim 1, further comprising a vehicle attached to said first pair of halbach arrays. A candidate system is the inductrack, employing permanent magnets on the. It is also used for some classes of magnetically levitated bearings. Since then, japans shinkansen network has expanded considerably, and its success has prompted rapid development of highspeed railways in other countries. The levitation is induced by the motion of the train.
A passive inducedcurrent system employing permanent magnets on the moving vehicle, the inductrack maximizes levitation forces by a combination of two elements. The maglev project consists of two construction phases. Much like a fullsized maglev system, the track and train need to be precisely. Electromagnets and superconducting magnets have allowed us to create a magnetic levitation train nicknamed maglev that floats on the track instead of being directly on it. Propulsion, magnetic levitation and guidance, transfer of energy to the vehicle. The goal of this effort is to investigate the feasibility and. Railway technology today 12 edited by kanji wako magnetic levitation maglev technologies the tokaido shinkansen began operations in 1964 and was an immediate success.
The inductrack maglev train by collin zajicek on prezi. The first laboratory scale train using the inductrack method was demonstrated in 1998. The scmaglev superconducting maglev, formerly called the mlu is a magnetic levitation railway system developed by central japan railway company jr central and the railway technical research institute on 21 april 2015, a manned sevencar l0 series scmaglev train reached a speed of 603 kmh 375 mph, less than a week after the same train clocked 590 kmh 370 mph, breaking the previous. Hyperloop transportation says it will use a cheaper. While maglev trains with passengers travel much slower, they still can travel twice as fast as their wheeled counterparts.
Simple magnetic levitation train seminar reportpdf ppt download. The track consists of a closepacked array of rectangular levitation coils, 15 centimeters in width transversely. Inductrack iii for superefficient leviation and movement of. T railway technology today 12 edited by kanji wako magnetic. In part i of this twopart paper, a new benchmark transient model of inductrack systems is developed.
The magnet configuration of claim 1, wherein due to the downward force of gravity, a midplane between said first pair of halbach arrays will lie below said track, wherein said restoring force will provide a net levitation force. Pdf this paper presents technology aspects and choices relative to worldwide. The use of a cantilevered track could present mechanical design problems in attempting to achieve a strong enough track system such that it would be capable of supporting very heavy loads. Modelling the electromechanical interactions in a null. A preliminary feasibility study concluded that a fullscale inductrack system would be less expensive to build and operate than the german maglev.
Maglev systems represent a promising evolution in the highspeed ground transportation, offering speeds in excess of 500 mph along with the potential for low operating costs and minimal environmental impact. The inductrack maglev system creates magnetic levitation through the interaction of the inductrack and magnets. At every step in this project, look to see if lines are straight and magnets are evenly spaced. Jan 06, 2008 thanks to klaus halbach and richard f. Magnetic levitation rail system free pdf file sharing. Inductrack iii configurations are suited for use in transporting heavy freight loads. Pdf the inductrack approach to magnetic levitation.
Both models are compared with measurements and show good predictive quality. The system is typically arranged on a series of filename. Urban and intercity maglev systems could represent a practical and energyefficient solution to pressing transit needs. In this part ii, the proposed model, which is governed by a set of nonlinear integrodifferential governing equations, is used to predict the dynamic response of inductrack systems. The track can be in one of two configurations, a ladder track and a. The inductrack approach to magnetic levitation pdf. Maglev transport maglev, or magnetic levitation, is a system of transportation that. The magnetic levitation train maglev project uses the concepts of electromagnetism and electrical machinery to levitate and propel a train along a track. In an inductrack system, the magnetic interaction forces are coupled with the motion of a moving vehicle carrying halbach arrays, which in many situations results in complicated transient behaviors of the system. Maglev trains free download as powerpoint presentation. Closed loop control of halbach array magnetic levitation. Magnetic levitation principles introduction magnetic fields are used to describe forces at a distance from electric currents. The inductrack possibilities and drawbacks use the inductrack levitation system to propel spacecrafts into space possibility to accelerate spacecraft 950 kmhr and save 30 to 40 percent on rocket fuel to make ride comfortable to passengers, other aerodynamic.
Maglev train free download as powerpoint presentation. A real comparison is lacking and not possible since noone has built an inductrack system yet while maglev systems do exist. The urban maglev team led by general atomics has developed an innovative approach using a passive, permanent magnet levitation system with a linear synchronous motor powering the guideway to provide propulsion and guidance. First, the permanent magnets on the vehicle are arranged in a halbach array, a magnet configuration that optimally produces a periodic magnetic field below the array. Inductrack ii, which is the design used by the ga urban maglev system, requires half the current to achieve the same levitation force per unit area as that required when using the singlesided inductrack i configuration, without substantially increasing the weight or footprint area of the halbach arrays. Pdf the inductrack approach to magnetic levitation semantic. This book describes a number of essential technologies that can ensure the safe operation of maglev trains, such as suspension and orientation. This maglev model accurately reproduces the setup of magnets used in shanghais maglev system and is made up of two parts. Highspeed maglev trains may one day revolutionize transport across the world.
Jul 07, 2019 add to watch list watching watch list is full. Electrodynamic nullflux with superconducting magnets, 2 eds pm. Another magnetic levitation alternative for consideration is based on the inductrack developed at the lawrence livermore national laboratory. The dynamic analysis of inductrack systems with the proposed model has two major tasks. Maglev trains are common in many asian and european countries, and are becoming popular in airports as well.
Citizens against scmaglev status of magnetic levitation. The key difference between japanese and german maglev train technology is that the japanese trains use supercooled, superconducting electromagnets. Inductrack iii for superefficient leviation and movement. First described by robert goddard, american rocket scientist, 1909 scientific american. Electrodynamic combined flux with permanent magnets in halbach arrays, named inductrack system, 3 ems lsm. This makes graysonline work more like a live auction where the bidding does not stop as long as there is still interest in the product, rather than assigning an arbitrary cutoff time. Inductrack is a completely passive, failsafe magnetic levitation system, using only unpowered loops of wire in the track and permanent magnets arranged into halbach arrays on the vehicle to achieve magnetic levitation. Inductrack iii configurationa maglev system for high. General atomics low speed maglev technology development.
First, the proposed model is validated through comparison with the noted steadystate results in the literature. Inductrack was invented by lawrence livermore national laboratory physicist richard f. The goal of the magnetic levitation train maglev project is to develop a small scale magnetic levitation train based on inductrack technology developed by dr. The inductrack concept 2 aims at finding a simpler and less expensive approach to maglev, one possibly with a wider variety of applications than present systems. The previous work of paul friend in 2004 includes the development of a laboratory scale model train containing permanent magnets. Llnl developed a maglev method in the late 1990s called the inductrack method. The major advantage of maglev trains is speed up to 580 kmh 4, which increases the range in which rail travel is comparable to air travel. The design of halbach arrays for inductrack maglev systems. Inductrack i is designed for high speeds, while inductrack ii is suited for slow speeds. At rest or in the station auxiliary wheels are needed. Inductrack replaces the electromagnets in conventional systems with permanent magnets, which dont require a power source in order to generate a magnetic field. This report describes theoretical and experimental investigations of a new approach to the problem of the magnetic levitation of a moving object. A fast and reliable software network load balancer daniel e. The motion of the train depends on the traction of linear motors in the vehicle.
A simpler approach to magnetic levitation arising out of research at the lawrence livermore national laboratory on passive. Maglev technologies general atomics ga is a pioneer in the research and development of innovative permanent magnets and linear motors to create clean, fast and efficient transportation solutions. Post inventions, today can be possible such great advances like inductrack and electromechanical batteries. Inductrack magnet configuration the regents of the. Inductrack iii addresses a problem associated with the cantilevered track of the inductrack ii configuration. Box 85608, ms 86, san diego, ca 921865608, usa long. Model maglev train the menlo roundtable menlo school. Us8578860b2 inductrack iii configurationa maglev system. May 04, 2015 maglev is the system of transportation that uses magnetic levitation to suspend,guide and propel the vehicles using magnets. Constructing an inductrack maglev j0820 objectivesgoals in our project constructing an inductrack maglev, our engineering goal was to construct a magnetically levitated train complete with a propulsion track. The development provides an innovative approach for low speed transportation suitable for very challenging urban environments. Review of maglev train technologies article pdf available in ieee transactions on magnetics 427. Abstract this paper presents the status of general atomics urban maglev program. The objective of this project is to create a laboratory scale magnetic levitating train model using inductrack technology developed by dr.
Maglev monorail proceedings of 22nd irf international conference, 22nd march 2015, pune, india, isbn. Maglev train download ebook pdf, epub, tuebl, mobi. This site is like a library, use search box in the widget to get ebook that you want. As a new approach to magnetic levitation by permanent magnet envisioned in 1990s, the concept of inductrack has been applied to designs of various maglev systems, including rocket launchers. As a new strategy for magnetic levitation, inductrack systems with halbach arrays of permanent magnets have been applied to maglev trains and intensively researched in various projects. Second, the transient response of an inductrack system is simulated and analyzed in several typical dynamic scenarios. Maglev, urban maglev, permanent magnet, halbach array, inductrack. Transient response of inductrack systems for maglev transport. Nasa studies project that savings of 30 to 40 percent of the rocket fuel, permitting singlestagetoorbit missions, should be possible with maglev acceleration and launching up a sloping track at mach 0. Status of the general atomics low speed urban maglev. Click download or read online button to get maglev train book now. The inductrack maglev concept may help nasa reduce the cost of launching satellites. The inductrack concept is a passive magnetic levitation system for moving objects that employs special arrays of permanent magnets in the. Maglev trains qfiles the online library of knowledge.
Inductrack demonstration model electronic resource. Apr 3, high reliability and lower maintenance and operating costs make magnetic levitation maglev technology integral to advancing the nations. Transient response of inductrack systems for maglev. To maximize the energy efficiency of maglev systems both the levitation means and the propulsion system must be optimized. Maglev train the levitating train hsc physics youtube.
Livermore national laboratory on passive magnetic bearings, a new magnetic levitation system, the. Todays fastest maglev train can speed along at 581 mph, about the speed of a commercial airplane. Concepts developed during research on passive magnetic bearing systems at the lawrence livermore national laboratory gave rise to a new approach to magnetic levitation, the inductrack. Maglev train paper presentation, magnetic leviation train. Maglev is the system of transportation that uses magnetic levitation to suspend,guide and propel the vehicles using magnets. Much like a fullsized maglev system, the track and train need to be precisely matched to work.
This project is a continuation of work done by paul friend in 2004. Maglev train in shanghai, china maglev short for magnetic levitation is a way of propelling a vehicle along using magnets rather than wheels and axles. Further savings come continuously since electrodynamic maglev designs like inductrack do not require powered feedback control systems to stabilize levitation. Aug 14, 2010 maglev train paper presentation, magnetic leviation train, high speed magnetic train. The inductrack approach to magnetic levitation unt digital. Hyperloop transportation says it will use a cheaper, safer. The urban maglev project is to create a full scale low speed maglev train utilizing permanent magnets. His inductrack team formulated the governing equations of the halbach array inductrack. Citizens against scmaglev status of magnetic levitation projects in the u. The track consists of a closepacked array of rectangular levitation coils, 15 centimeters in width transversely and 20 meters in length. Some of the presently perceived practical problems of implementing fullscale maglev systems based on the inductrack concept will be discussed. Japanese engineers have developed a competing version of maglev trains that use an electrodynamic suspension eds system, which is based on the repelling force of magnets. The inductrack, as its name suggests, produces levitating force by inducing electric currents in the track. Simple magnetic levitation train seminar report pdf ppt download the answer to this transportation problem lies in the world of electro magnetism and superconducting magnets.
Moving a permanent magnet near a loop of wire will cause a current to flow in the wire, as english physicist michael faraday discovered in 1831. The design of halbach arrays for inductrack maglev systems no. The use of a cantilevered track could present mechanical. Commercial maglev rails are few and far between as there are only 2 rails in existence today that transport people.
A cantilevered ladder track is used, interacting with two facing halbach arrays, one above, and one below the track. Arising out of research at the lawrence livermore national laboratory on passive magnetic bearings, a new magnetic levitation system, the inductrack, has b. Design of a microcontroller based economic maglev guideway system shahidul islam khan1, md. In an inductrack system, the magnetic interaction forces are coupled with the motion of a moving vehicle carrying halbach arrays, which in many situations. Inductrack maglev pdf the bearings developed at livermore employed cylindrical magnet arrays to sta inductrack maglev system could allow trains to glide across the country. In this twopart paper, a new transient model of two degreesoffreedom for inductrack systems is proposed. The simplicity of the inductrack should make it substantially less expensive than the present eds or ems maglev trains. Inductrack is a passive, failsafe electrodynamic magnetic levitation system, using only unpowered loops of wire in the track and permanent magnets arranged into halbach arrays on the vehicle to achieve magnetic levitation. Our maglev rail will feature a modified version of the inductrack maglev design as well as electromagnetic suspension design ideas. May 09, 2016 the system is a cheaper, safer alternative to regular magnetic levitation, or maglev, which is currently in operation powering highspeed trains in china and europe. Problems and barriers impeding the implementation of. A maglev vehicle is levitated a short distance using magnets to create forces of both lift and thrust.
The advantages of the laminated track over the presently employed ladderlike litzcable design are the higher conductor packing fraction that can be achieved, its potentially lower fabrication cost, and the tracks longtime durability no solderjoints are required in manufacturing the track. Department of transportation, federal transit administration along with general atomics ga, hall industries, and many other companies. Us8985030b2 inductrack iii configurationa maglev system. The electromagnet control loop is designed using the equations. Inductrack maglev system could allow trains to glide across the. Inductrack trains could levitate higher with greater.
The inductrack ii maglev employs dual halbach arrays, reducing drag losses and enhancing levitation forces. Arising out of research at the lawrence livermore na. The inductrack is thus failsafe, that is, drive system failure would only result in the vehicle slowing down and finally settling on its auxiliary wheels. For further detailed studies four maglev technology was selected 1 eds scm. The inductrack maglev system global climate and energy project. The new technol ogy would employ arrays of permanent magnets on the undersides of the train cars, which would levitate a few centimeters above the tracks. Recent innovations in maglev technology, such as the inductrack system, promise failproof operation. Inductrack demonstration model technical report osti. For maglev applications this speed is a few kilometers per hour, walking speed. Chassis must be light as possible, must achieve levitation of at least 2 millimeters, transition speed must. Richard post from lawrence livermore national labs llnl. Inductrack is a passive, failsafe magnetic levitation system, using only unpowered loops of wire in the track and permanent magnets arranged into halbach arrays on the vehicle to achieve magnetic levitation.
Maglev 4 3 control system design in order to control the ball position, we need to control the current in the electromagnet. Inductrack is a completely passive magnetic levitation train system, using only unpowered loops of wire in the track and permanent magnets in halbach arrays on the train to achieve levitation. Apr 19, 2000 concepts developed during research on passive magnetic bearing systems at the lawrence livermore national laboratory gave rise to a new approach to magnetic levitation, the inductrack. Gas passive maglev system uses permanent magnetics on vehicles and linear synchronous motors on guideways to levitate and propel vehicles. A simpler approach to magnetic levitation citeseerx. This lesson is designed for students to have ample time to explore the properties of magnets. By contrast with previously studied levitation approaches, the inductrack concept concept represents a simpler, potentially less expensive, and totally passive means of levitating a highspeed train. Electrodynamic suspension can also occur when an electromagnet driven by an ac electrical source produces the changing magnetic field, in some cases, a linear induction motor generates the field.
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