Transcript ankitrchadha.com

MAGLEV TRAINS
Branch – EXTC 2
Batch 2010-2011
Semester – 2
Group 2
Communication Skills
•
MAGLEV is the principle used in working of Maglev Trains.
•
MAGLEV – Derived from MAGnet and LEVitation.
•
Method of supporting and transporting objects which is based on the
physical property that the force between two magnetized bodies is
inversely proportional to their distance.
•
Magnetic force counterbalances the gravitational pull between a magnet
and a guideway.

Maglev principle can be applied in two ways-
1.
Electro-Magnetic Suspension (EMS) System
2.
Electro-Dynamic Levitation (EDL) System
1.
Electro-Magnetic Suspension (EMS) System

It is attraction type of system.

Magnet- guideway geometry is used to attract a directcurrent electromagnet towards the track.

EMS levitates the train about one-third of an inch above
the guideway.

Maglev train (Transrapid) in Germany works on EMS.
2.
Electro-Dynamic Levitation (EDL) System

It is repulsion type of system.

Eddy currents are generated by superconducting coil
operating in persistent current mode.

Eddy currents create a magnetic field and opposes the
magnetic field created by traveling coil by Lenz’s law.

EDL levitates the train about 4 inches (10 cm) above the
guideway.

Maglev train in Japan works on EDL.
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!
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.





Batteries on the train power the system, and therefore it
still functions without propulsion.
The batteries can levitate the train for 30 minutes
without any additional energy.
Linear generators in the magnets on board the train use
the motion of the train to recharge the batteries.
Levitation system uses less power than the trains air
conditioning.
The system consists of threephase cable windings in the stator
packs.

On
supplying current to the
windings, it creates a traveling
alternating current that propels the
train forward.
When the alternating current is
reversed, the train brakes.

Only the section of track where
the train is traveling is electrified.

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.
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.

Comfort

The ride is smooth while not accelerating.
Economic Efficiency

The initial investment is similar to other high speed rail roads.

Operating expenses are half of that of other railroads.
Eco Efficiency
Petroleum Independence. Less Polluting.

Speed

The train can travel at about 300 mph.
For trips of distances up to 500 miles its total travel time is equal to a planes
(including check in time and travel to airport.)
 It uses less energy than existing transportation systems.

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.
Magnetic Field
The magnetic field created is low, therefore there are no
adverse effects.

Large initial capital investment.

Lack of human experience with Maglev technology.

Designing of tracks.

Confirmation for possibilities of safe, comfortable, and stable run at 500
km/h.

Confirmation of structural standards including the minimum radius of
curvature and the steepest gradient.

Confirmation of vehicle performance in relation to tunnel cross-section
and to pressure fluctuations in the tunnels.

Confirmation of environmental impact.

Establishment of multiple-train operation control systems.

Confirmation of operation and safety systems and track maintenance
criteria.

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.

Maglev trains use magnets to levitate and propel the trains
forward.

Since there is no friction these trains can reach high speeds.

It is a safe and efficient way to travel.

It is environment and user friendly.

Governments have mixed feelings about the technology. Some
countries, like China, have embraced it and others like Germany
have balked at the expense.
Prepared by:

Ankit Chadha

Prathamesh Birwatkar

Pranav Bhedi

Pravin Chavan

Ramchandra Cheke

Madhur Chauhan