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MAGLEV TRAINS Trains that fly

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PRESENTATION OUTLINE

What is maglev?

Types of maglev

How maglev trains works. Propulsion

Levitation

Lateral guidance

Materials used in building of maglev

Application information Safety

Maintenance

Speed

Environment

Comfort

Magnetic field

Noise

Features

References

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WHAT IS A MAGLEV?

A MAGLEV is a MAGnetically LEVitated train, that relies more on magnetic

systems than mechanical systems for its propulsion and stability.

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TYPES OF MAGLEV’S

EDS Type- This type uses wheels to reach lift-off velocity ( typically

at 100mph)and then retracts the wheels and then uses

electromagnets for levitation and propulsion. One of the early

developed models.

EMS Type- This type uses only electromagnets for levitation and

propulsion.

INDUCTRACK- This is a variant of EDS Type it uses induction

coils for levitation

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EMS TYPE MAGLEV SYSTEM

EX:- Shanghai MAGLEV , China

Commercially available

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HOW MAGLEV TRAINS WORK

STABILTY

The electromagnets on the underside of the train pull it up to the ferromagnetic stators on the track and levitate the train.

The magnets on the side keep the train from moving from side to side.

A computer changes the amount of current to keep the train 1 cm from the track.

This means there is no friction between the train and the track!

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PROPULSION

An alternating current is ran through electromagnet coils on the guide walls

of the guide way. This creates a magnetic field that attracts and repels the

superconducting magnets on the train and propels the train forward.

Braking is accomplished by sending an alternating current in the reverse

direction so that it is slowed by attractive and repulsive forces.

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LEVITATION

The passing of the superconducting magnets by figure eight

levitation coils on the side of the tract induces a current in the coils

and creates a magnetic field. This pushes the train upward so that it

can levitate 10 cm above the track.

The train does not levitate until it reaches 50 mph, so it is equipped

with retractable wheels.

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LATERAL GUIDANCE

When one side of the train nears the side of the guideway, the super

conducting magnet on the train induces a repulsive force from the

levitation coils on the side closer to the train and an attractive force

from the coils on the farther side. This keeps the train in the center.

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POWER SUPPLY

Batteries on the train power the system and also its propulsion.

Levitation system uses less power than the trains air conditioning.

Onboard batteries are rechargeable and are done using its linear

generators.

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MATERIALS USED IN BUILDING OF TRAIN

The train’s chassis will be mainly made up of aluminum to ,with an

iron cage to shield electronic circuitry from strong magnetic fields.

The other parts including the body of maglev will be made of Fiber

Reinforced Plastic.

The train will have basic ambience and rechargeable batteries

onboard similar to the existing models.

The train’s motion and ambience will be controlled from ground

stations similar to real ones.

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APPLICATION INFORMATION

Safety

The trains are virtually impossible to derail because the train is

wrapped around the track.

Collisions between trains are unlikely because computers are

controlling the trains movements.

Maintenance

There is very little maintenance because there is no contact

between the parts.

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The linear generators produce electricity for the cabin of the train.

Speed

Can travel at about 300 mph.

For trips of distances up to 500 miles its total travel time is equal to

a planes.

Can accelerate to 200 mph in 3 miles, so it is ideal for short jumps.

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ENVIRONMENT

Uses less energy than existing transportation systems.

For every seat on a 300 km trip with 3 stops, the gasoline used per 100

miles varies with the speed.

At 200 km/h - 1 liter,

300 km/h - 1.5 liters

400 km/h - 2 liters.

1/3 the energy used by cars and 1/5 the energy used by jets per mile.

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ENVIRONMENT (landscape)

Less impact on the environment

Uses less land than conventional

trains,

Follow the landscape better than

regular trains since it can climb 10%

gradients (while other trains can only

climb 4 gradients) and can handle

tighter turns.

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Comfort

Ride is smooth while not accelerating..

Economic Efficiency

The initial investment is similar to other high speed rail roads.

Operating expenses are half.

Composed of sections- each contain 100 seats,

Can have between 2 and 10 sections.

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Magnetic Field:

The magnetic field created is low, therefore there are no adverse

effects.

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Noise Pollution

The train makes little noise because it does not touch the track and

it has no motor. Therefore, all noise comes from moving air. This

sound is equivalent to the noise produced by city traffic.

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SALIENT FEATURES

It’s top speed with people aboard is 350 mph.

The super conducting magnets create a strong magnetic field that could

be a problem for some passengers.

The train is earthquake proof because the greater space (10 cm) between

the track and the train leaves more room for track deformation

Linear generators will produce all the electricity needed in the train’s

interior.

Only the part of the track that is used will be electrified so no energy is

wasted.

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REFERENCES

Integrated electromagnetic levitation and guidance system for

the Swiss Metro project, by D’ARRIGO Aldo, RUFER Alfred, Swiss

Federal Institute of Technology.

Wikipedia.

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QUERIES??????

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THANK YOU