a good ppt on maglev

1. MAGLEV AND
LEVITATION
TRAIN
BY- INDRA KUMAR PAL

2. INTRDUCTION
MAGLEV= MAGNET+ LEVITATION
The term maglev refers not only to
the vehicles but also to the railway
system.
Maglev train use magnetic
levitation from a very large number
of magnets for lift and propulsion.

3. INTRODUCTION
Has the potential to be faster, quitter
and smoother than wheeled mass
transit system.
Japan, Germany were pioneers, USA
and Australia are working on it now.

4. HOW IT WORKS
 A maglev train floats about 10 mm
above the guideway on a magnetic
field.
It is propelled by the guideway itself
rather than an on board engine by
changing the magnetic fields.

5. HOW IT WORKS
Once the train is pulled into the next
section the magnetism switches so
that the train is pulled on again.
The electro-magnets run the length of
the guideway.

8. MAGLEV TECHNOLOGY
There are two primary types of
maglev technology:
electromagnetic suspension (EMS)
electrodynamic suspension (EDS)

9. ELECTROMAGNETIC SUSPENSION
(EMS)
 In current EMS system ,the train levitation
above a steel rail while electromagnets
attached to the train are oriented toward
the rail from below.
 The electromagnets use feedback control
to maintain the train at a constant
distance from the track.

10. ELECTRODYNAMIC SUSPENSION
 In electrodynamic suspension both the rail
and the train exert a magnetic field and
the train is levitated by repulsive force
between these magnetic fields.
 The repulsive force in the track is created
by an induced magnetic field wires or
other conducting strip in the track.

11. ELECTRODYNAMIC SUSPENSION
At slow speed the current induced in
these coils and resultant magnetic
flux in not large enough to support
weight of the train.
For the reason the train must have
wheel or some other form of landing
gear.

12. ELECTRODYNAMIC SUSPENSION
 Propulsion coils on the guide way are used
to exert a force on the magnets in the train
and make the train move forward.
 The propulsion coils that exert a force on
the train are effectively a linear motor.
 And alternating current flowing through the
coils generates a continuously varying
magnetic field that moves forward along
the track.

13. DID YOU KNOW ?
 Maglev train can attain speed of 300mph
easily (the speed of jet aircraft)
 The JAPANESE MAGLEV last records was of
581km/h
 The SHANGHAI Maglev train can speed up to
431km/h or 267mph.
 The first commercial maglev was opened in
1984 in Birmingham , England covering some
600 meters between airport and rail hub.

14. Advantages of Maglev
• A Maglev is way faster than your usual bullet train.
Maglevs can reach speeds up to 500 kilo meters per
hour.
• Due to its lack of wheels, Maglevs are quieter than
normal trains, or sometimes even traffic.
• Maglevs use 30% less energy than normal trains.
• In theory, a Maglev and its track would require very little
maintenance since the train never touches the track
there is virtually no wear and tear.

15. Disadvantages of Maglev
• The Maglev's track is much more expensive than
railroad tracks.
• Whole new sets of tracks would have to be built
for the Maglev to run. Many Transportation
vehicles in Europe run on existing track, like the
TGV trains in France.
• Although Maglevs are pretty quiet, noise caused
by air disturbance still occurs.