magnetic leviation train

8/9/2019 Magnetic Leviation Train

1/19

SEMINAR

ON

MAGNETIC LEVITATION TRAIN

PREPARED BY:PATEL ANKIT R.

PARIKH RAVI R.


2/19

HISTORY OF TRAIN TRANSPORTATION

STEAM ENGINE TRAINS

DIESEL ENGINE TRAINS

ELECTRIC TRAINS

MAGNETIC LEVITATION TRAINS


3/19

INTRODUCTION TO MAGLEV

MAGLEV MAGNETIC LEVITATION

TRAIN

It mainly works on two system1) EMS Electro Magnetic Suspension

2) EDS Electro Dynamic Suspension


4/19

EMS SYSTEM

The design consisting of using conventional

electromagnets directly under the train and rail is

called Electromagnetic Suspension (EMS).

The train levitates only 10mm away from the

guide way.

To prevent the train from hitting the guide way.

computer programs and very sensitive sensorsmonitor the train, adjusting it instantaneously.


5/19

EDS SYSTEM

In this design electromagnetic coils run along

the sides of the guide way in the guide walls.

The EDS system lifts the train nearly 10 times

higher than the EMS system.

Electromagnetic coils are located in the guide

walls of the guide way. Current is supplied to

these coils to provide alternating B-fields usingalternating 3-phase power.


6/19

Like the conventional

trains, maglev trains

must also follow a

track called a guide

way.

There needs to be asystem that keeps the

train from running into

the sides of the guide

way or leaving thetrack all together. This

system is called

guidance system.


7/19

If the train set down on anyone side thenthe difference in the B-fields creates arestoring force that pushes the train back

toward the center of the track. Train is closer to experiences a stronger

B-field and on the opposite set

experiences a weaker B-field. This makesdifference in the B-fields.


8/19

COOLING SYSTEM

The train contains magnetic fields directedtoward the guide walls.

The electromagnets create a Quadra poles oneach car of the train. Each of the coils in thesuperconducting magnet have resistance of 3.4ohms at a temperature of 300 Kelvin, but only0.442 ohms resistance at a temperature of 77Kelvin. That is why the magnets are super

cooled. In order to cool the magnets to this low of atemperature, a refrigeration system consisting ofliquid helium and liquid nitrogen is used.


9/19

GUIDANCE LEVITATION COIL

There are many of these coils layered on

top of each other built into the track. These

coils are shaped similar to a figure 8.

The reason they are shaped like a figure 8

is to give them a Null Flux design. Null

flux means that the flux in the direction of

travel produces a net force of zero on thetrain.


10/19

The trains B-fields must be categorized

into two different parts.

1) HORIZONTAL FLUX CANCELING2) VERTICAL FLUX RESTORATION


11/19

HORIZONTAL FLUX CANCELING


12/19

HORIZONTAL FLUX CANCELING


13/19

VERTICAL FLUX RESTORING

The forces needed to

levitate the train are

due to the vertical flux

component. Vertical flux

components :

1) Phase A2) Phase B


14/19

The top half of the

coils in both phases

are shown.


15/19

ISOMETRIC VIEW OF

GUIDEWALL AND TRAIN


16/19

PROBLEMS FACED BY EDS

DESIGN The cost of manufacturing and installingsuspension and propulsion components.

The suspension system must have powerloss that is comparable to that for EMS.

All EDS suspension system designs arehighly under damped and it is imperative

to find practical means to damposcillations and provide high ride quality.


17/19

External magnetic fields associated with

onboard superconducting magnets mustbe reduced, particularly in the passengercompartments.

The need for separate low speedsuspension system increases the cost,weight and complexity of both the vehicleand guide way.

Any superconducting vehicle magnetsmust be able to operate reliably in ahostile transportation environment.


18/19

ADVANTAGES

LESS FRICTION (ONLY AIR FRICTION)

VERY LESS WEAR AND TEAR OF

PARTS HIGH SPEED (550 km/hour)


19/19

magnetic leviation train

Documents