MAGLEV MAGLEV (Magnetically (Magnetically

levitated trains)levitated trains)Trains that fly!!!!!!Trains that fly!!!!!!

MAGNETIC LEVITATIONMAGNETIC LEVITATION1.1. Process of suspending an object in air with the Process of suspending an object in air with the

help of magnetic fieldshelp of magnetic fields

2.2. Moving a good electrical conductor like gold on a Moving a good electrical conductor like gold on a magnet produces eddy currents on the conductormagnet produces eddy currents on the conductor

3.3. At a sufficiently high rate of movement, a At a sufficiently high rate of movement, a suspended magnet will levitate on the metal, or suspended magnet will levitate on the metal, or vice versa with suspended metalvice versa with suspended metal

4.4. Superconductors bieng fully diamagnetic repel Superconductors bieng fully diamagnetic repel magnetic fields and can levitate when a magnetic fields and can levitate when a sufficiently high amount of magnetic field is sufficiently high amount of magnetic field is appliedapplied

The History of Magnetic The History of Magnetic Levitation VehiclesLevitation Vehicles

1- 1750 – John Mitchell conducted the first experiments measuring the magnetic forces between the poles of a magnet.

2-1900 – Robert Goddard and Emile Bachelet conceive the concept of frictionless trains.

3.-1969 – American scientist James R. Powell and Gordan T. Danby patented the first design for Maglev trains.

4-1970 – German and Japanese engineers start research and development towards their versions of Maglev technology.

2003 – The Shanghai Trans-rapid Maglev 2003 – The Shanghai Trans-rapid Maglev Line is inaugurated.Line is inaugurated.

How maglev worksHow maglev works 1-1-A maglev train floats about 10mm above the A maglev train floats about 10mm above the

guide way on a magnetic field.guide way on a magnetic field.

2-2 ways of levitating a train-Electromagnetic 2-2 ways of levitating a train-Electromagnetic suspension(EMS) and Electrodynamic suspension(EMS) and Electrodynamic suspension(EDS).suspension(EDS).

3-Both ways have the same underlying 3-Both ways have the same underlying concept-a magnet will repel another magnet.In concept-a magnet will repel another magnet.In both cases magnets in both the track and the both cases magnets in both the track and the undercarriage of the train repel each other to undercarriage of the train repel each other to levitate the train.levitate the train.

EMSEMS

EDSEDS

AdvantagesAdvantages 1- Because the train floats along there is 1- Because the train floats along there is

no contact with the ground and therefore no contact with the ground and therefore no need for any moving parts.Hence there no need for any moving parts.Hence there are no components that would wear out.are no components that would wear out.

2- The trains are virtually impossible to 2- The trains are virtually impossible to derail because the train is wrapped derail because the train is wrapped around the track.around the track.

3-The trains can attain speeds upto 3-The trains can attain speeds upto 500km/hr which is not economically viable 500km/hr which is not economically viable for commercial railwaysfor commercial railways

DisadvantagesDisadvantages 1-The biggest problem is that it is 1-The biggest problem is that it is

much more costly than conventional much more costly than conventional track railways and governments track railways and governments around the world aren't willing to around the world aren't willing to invest so heavily in such a project.invest so heavily in such a project.

2-Another problem is that the EM 2-Another problem is that the EM waves from the tracks may affect waves from the tracks may affect mobiles and pacemakers of heart mobiles and pacemakers of heart patientspatients

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