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# Magnetic levitation trai ns

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### Magnetic levitation trai ns

1. 1. CONTENTSINTRODUCTIONTYPES OF MAGLEV TECHNOLOGYBASIC STRUCTURECOMPARISON WITH COMMERCIAL TRAINSADVANTAGESCONCLUSION
2. 2. INTRODUCTIONMaglev is a system of transportation that suspends, guides and propels vehicles, predominantly trains, using magnetic levitation from a very large number of magnets for lift and propulsion.The highest recorded speed is 581 km/h achieved in Japan in 2003.
3. 3. TYPES OF MAGLEV TECHNOLOGYThere are 2 notable types of maglev technology:-• Electromagnetic suspension(EMS)• Electrodynamic suspension(EDS)• Induct rack
4. 4. ELECTROMAGNETIC SUSPENSION Electromagnets attached to the train Has ferromagnetic stators on the track and levitate the train. Has guidance magnets on the sides A computer changes the amount of current to keep the train 1 cm from the track. Max speed - 438km/hr Has on-board battery power supply.
5. 5. ELECTRODYNAMIC SUSPENSION The first major difference between EDS and EMS is the type of track. EDS uses superconducting magnets (SCM) located on the bottom of the train to levitate it off of the track. The repulsive forces between the magnets and coils lift the train, on average, about 4 to 6 inches above the track, Requires retractable wheels at low speed , max speed – 522km/hr
6. 6. A NEW TRACK IN THE RUNNING (INDUCTRACK)This system uses an “arrangement of powerful permanent magnets, known as a Halbach array, to create the levitating force”. MODEL OF THE INDUCTRACK
7. 7. BASIC STRUCTUREMaglev Consist of Three parts1)Levitation2)Guidance3)Propulsion
8. 8. LEVITATIONIn EDS , levitation coils levitate the train 10cm above the track. Levitates when speed reaches 100km/hrIn EMS , stator & support magnet levitate the train 1cm above the track. Levitates even when train is not moving.
9. 9. GUIDANCESome systems use Null Current systemIn EDS when the vehicle is in straight line , no current flows When it moves off the line this creates changing flux, generating a field that pushes and pulls it back to the line.Some systems use coils that try to remain in the null flux point between repulsive magnets and reduces eddy current losses.
10. 10. PROPULSIONEMS systems provide levitation & propulsion using onboard linear motor. EDS system and Train rapid systems levitate using onboard magnets & use propulsion coils for propulsion .Cost of propulsion coils increase over long distances.
11. 11. COMPARISION WITH COMMERCIAL TRAINSMaglev trains produce less noise than a conventional train at equivalent speeds.Maglev is atmosphere friendly not produce toxic SmokeRelatively very high speed than Commercial trains.No resistance between the rail and Track so very high speed is attainable, thats why some times Maglev is compared with aeroplanes.
12. 12. ADVANTAGESElimination of wheel and track wear providing consequent reduction in maintenance cost.The absence of wheels removes much noise and vibration.It needs less power supply.It is more safety.It is fire resistance.
13. 13. CONCLUSIONMaglev will have a positive impact on sustainability. Using superconducting magnets instead of fossil fuels, it will not emit greenhouse gases into the atmosphere.Maglev will contribute more to our society and our planet than it takes away. Considering everything Maglev has to offer, the transportation of our future is on very capable tracks.