DRIVING WITHOUT WHEELS And FLYING WITHOUT WINGS
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#1
02-04-2010, 03:17 PM


Abstract
This paper Driving without wheels, Flying without wings 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 know as "Repulsive Levitation," and EMS is commonly known as "Attractive Levitation." Each type of Maglev system requires propulsion as well as "levitation." The various project and implimentations above use different techniques for prpulsion, 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).
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harshitha1711
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#2
06-06-2010, 09:24 PM

plz send me pdf file this
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cyber120
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#3
27-06-2010, 05:57 PM

Plz send a ppt file for this Topic
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#4
29-06-2010, 06:49 PM

DRIVING WITHOUT WHEELS,
FLYING WITHOUT WINGS


Basic principle:
When two bar magnets are suspended with unlike poles near, Any effort to bring these two magnets into closer faces a force of repulsion which is proportional to the strength of the magnetic field between the two bar magnets. The the effects of gravitation is counteracted by the electromagnetic force.
The MAGLEV thus suspends, guides and propels vehicles via electromagnetic force. They have a lot of advantages like
-They can be supported on lightweight elevated tracks.
-can ascend steeper slopes than conventional trains
As there is no physical contact between the track and vehicle , only the minute friction between the carriages and air matters here. So very high speeds upto 650 KMPH can be attained and also the energy consumption and noise levels are low.

Electrodynamic suspension
In this system , , both the rail and the train exert a magnetic field and the repulsive force levitates the train. No feedback control is required in this case as the forces to repel the magnets automatically adjust their magnitude as the train moves farther and closer to the magnet. They have a major disidvantage that the current induced in the coils and the resultant magnetic flux is not large enough to support the weight of the train.

Linear induction motor (LIM) in magnetic levitation
The High Speed Surface Transport (HSST) is driven by such a motor. The the carriage body houses the primary coils, and the the steel rails and aluminum reaction plates form the track.

full report:
scribddoc/29410873/maglev
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#5
13-10-2010, 04:26 PM


.doc   DRIVING_WITHOUT_WHEELS_FLYING_WITHOUT_WINGS.doc (Size: 486.5 KB / Downloads: 199)


Abstract

This paper “Driving without wheels, Flying without wings” 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 know as "Repulsive Levitation," and EMS is commonly known as "Attractive Levitation." Each type of Maglev system requires propulsion as well as "levitation." The various project and implimentations 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.
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#6
19-01-2012, 10:11 AM


to get information about the topic driving without wheels flying without wings refer the link bellow

topicideashow-to-driving-without-wheels-and-flying-without-wings
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nethravathi.k
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#7
15-02-2012, 02:00 PM

i want more information about this topic.
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