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A SEMINAR ON MAGLEV
Presented by
Subhra ch. behera (1421005)
Debasish mohapatra(1421006)
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AGENDA
 INTRODUCTION
 WHAT IS MAGLEV TRAIN
 WHY MAGLEV TRAIN??
 HISTORY
 TYPES OF MAGNETIC LEVITATION
 Types of technology involved
 Working principle
 Future scopes
 conclusion
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INTRODUCTion
 Maglev = magnetic +levitation.
• It is a method by which an
object is suspended with no
support other than magnetic
fields.
• Magnetic force is used to
counteract the effects of the
gravitational and any other
accelerations.
(A cubical magnet levitating over a
superconducting material)
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WHAT IS MAGLEV TRAIN ??
 Magnetic Levitation Train (Maglev Train) is an
advanced train technology in which magnetic forces
lift, propel, and guide a vehicle over a guide way.
 It employs powerful superconducting magnets to
levitate or "float“ cars about 2 inches above a guideway.
 Liquid helium cools the magnets to near absolute zero
enabling relatively small magnets to create very
powerful fields.
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Why maglev train???
MagLev Trains Conventional Trains
No Friction = Less
Maintenance
Routine Maintenance
Needed
No Engine = No fuel
required
Engine requires fossil
fuels
Speeds in excess of
300 mph
Speeds up to 110 mph
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HISTORY
 1900 - Robert Goddard and Emile Bachelet conceived the
concept of frictionless trains.
 1969 - American scientists James R. Powell and Gordan T.
Danby patented the first design for magnetic levitational
trains.
 1970 - Germans and Japanese start research and
development towards their versions of maglev technology
 1991 - Germany's government certifies operation of first
maglev train for the public.
 Finally accomplishing practical public service in 2003 in
Shanghai, China
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Basic of Magnetic Levitation
 Faraday’s Law :-
 1st Law :- It states that whenever a conductor cuts
magnetic flux , an emf is induced in that conductor.
 2nd Law :- It states that the magnitude of the induced
emf is equal to the rate of change of flux-linkage.
i.e. , e=-Nⅆφ volts
dt
 Lenz’s Law :-
 It states that , the direction of the induced current is
such that the induced magnetic field opposes the
change in the flux.
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Lenz’s law
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Types of Magnetic Levitation
Permanent Magnet
Electro Magnet
Superconducting Magnet
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Permanent Magnet
The first type of levitation is the
implementation through permanent
magnets. These magnets are made of
a material that creates a north and a
south pole on them.
The main disadvantages of a
permanent magnet are the cost of
the magnet itself when put into
large scale systems.Another
disadvantage is the varying changes
in the magnetic field.
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Electro Magnet
By running electric
current through a wire, we
can create a magnetic
field.
When this wire is coiled
around a magnetic
material (i.e. metal), a
current is passed through
this wire, then the electric
current will magnetize
the metallic core.
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Superconducting Magnet
 The superconducting magnets is a material which
presents no electrical resistivity to electrical current.
 Once a current has been fed into the coils of this
material, it will indefinitely flow without requiring the
input of any additional current
I2R loss = 0
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Types of Technology
Electro Magnetic Suspension
Electro Dynamic Suspension
Induced Track System
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ELECTRO MAGNETIC SUSPENSION
The attractive force of magnet are utilised in EMS
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Electro Dynamic Suspension
The repulsive forces of magnets are utilised in EDS
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Induced track system
Operates on the basis of
principle of lenzs law
Can attain levitation at
comparatively low speed
of about 22 mph
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Working Principle of Maglev Train
 Principle of Levitation
 Principle of Lateral Guidance
 Principle of Propulsion
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Levitation
 It pushes the train
upward so that it can
levitate 10 cm above the
track.
The train does not
levitate until it reaches
80 km/h , so it is
equipped with wheels.
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Lateral Guidance
Use null current
system
Works on the basis of
lenz’s law

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Propulsion
When a current is supplied
to the windings, it creates a
traveling alternating
current that propels the
train forward by pushing
and pulling.
When the alternating
current is reversed, the
train brakes
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Advantages Limitation
uses 30% less energy than
high speed train
Longer lifetime with low
maintenance costs
 Energy efficiency
 No pollution
 Environmental benefits
 Safety advantages
Requires complex circuitry.
Requires highly skilled and
trained operators.
Requires more research.
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FUTURE SCOPES
MACH-3
Maglev space propulsion
Electric generators- made with superconducting
wire: They have a 99% efficiency and have about
half the size of conventional generators
MagLev Trains in INDIA
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conclusion
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.
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References
 E. Riches, “Will Maglev lift off?,” IEEE Review, pp. 427–430,
Dec. 1988
• www.wikipedia.org/wiki/Magnetic_levitation
• Maglev Trains (Thompson, Marc T. Eddy current magnetic
levitation, models and experiments).
• S. Yamamura, “Magnetic levitation technology of tracked
vehicles present status and prospects,” IEEE Trans. Magn.,
vol. MAG-12, no.6, pp. 874–878, Nov. 1976
 P. Sinha, “Design of a magnetically levitated vehicle,” IEEE
Trans. Magn., vol. MAG-20, no. 5, pp. 1672–1674, Sep. 1984
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THANK YOU
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