The document discusses maglev (magnetic levitation) technology used in trains, which allows for frictionless travel by using electromagnetic forces for levitation, propulsion, and lateral guidance. It details two types of maglev technology: electromagnetic suspension (EMS) and electrodynamic suspension (EDS), and also introduces ultra-high-speed tube trains that operate in a vacuum to enhance speed beyond traditional limits. Despite its advantages, challenges such as speed limitations due to air resistance and potential passenger safety issues in tube trains are acknowledged.

1. THE MAGLEV TECHNOLOGY
PRESENTED BY : AMAN CHAND
COLLEGE : GH RAISONI COLLEGE OF ENGINEERING AND
MANAGEMENT
PLACE : PUNE
COURSE : SE MECHANICAL ENGINEERING

2. About maglev trains
 Maglev = magnetic + levitation
 Maglev technology has used electromagnetic force to hold up the
entire train compartment.
 Electricity is the main source of energy.
 The train propels or move forward without any friction with moving
mechanical parts.
 The beauty of maglev is that it travels on air.

3. Basic principles of maglev trains
Maglev trains have to perform the following
functions to operate on high speeds
 LEVITATION
 PROPULSION
 LATERAL GUIDANCE

4. PRINCIPLE OF MAGNETIC
LEVITATION
 Strong magnets are attached to the train.
 Magnets with same polarity are used
Which repels and levitates the train.
 Has ferromagnetic stators on the
track and levitate the train.
 A computer changes the amount
of current to keep the train 1 cm to
10 from the track.

5. TYPES OF MAGLEV
TECHNOLOGY
There are two types of maglev technology
 Electromagnetic Suspension (EMS)
Uses electromagnets for levitation ,propulsion and lateral guidance.
 Electrodynamics Suspension (EDS)
Uses superconductors are used for levitation ,propulsion and lateral
guidance.

6. PRINCIPLE OF PROPULSION
 Attractive forces between unlike magnetic poles pull each element
of the rotor toward the corresponding element of the stator.
 Just as the two poles are coming into alignment, the polarity of
the armature magnets is reversed, resulting in a repulsive force
that keeps the motor turning in the same direction.
 This is happened vice –versa and train attain the speed of – 450km/hr.

7. PRINCIPLE OF LATERAL GUIDANCE
 The levitation magnets and rail are both
U shaped, with rail being an inverted U.
 The mouths of U face one another.
 When one side of the train nears the side of the guide way, 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.

8. DRAWBACKS USING OF LIM
The main draw back of this type of maglev train is
its speed limit i.e. upto 500 km/hr Because of air
resistance and aerodynamic noise, greater speeds
are difficult to reach.

9. Introduction of ultra high speed train
 To overcome this speed limitation the concept of an ultra-high-
speed tube train are introduce.
 It runs through a partial vacuum tube.
 There is no air drag so resistance to air becomes zero.
 This increases the speed and efficiency greatly .
 It attains speed of about 700 km/hr.

10. PROBLEM FACED BY TUBE TRAIN
 At a speed of 700 km/hr a large thrust force ripple
causes vibration, noise and severe levitation disturbance
during the train operation.
 The passengers may suffer from the risk of cabin
depressurization in the event of a train malfunction.

11. LET’S SEE HOW IT WORKS
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