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TRANSRAPID MANGLEV. BY– ISHAAN GUPTA ECE-123 03914802810. OUTLINE. Maglev. Two. Types. Full scale speed. 500 km/ hr. Types. EMS. Magnetic attraction . Servo-Controlled . Electromagnets. Iron-plate rail. EDS. Magnetic repulsion. S uperconducting. Induction. Cryogenic.

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TRANSRAPID MANGLEV

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Transrapid manglev

TRANSRAPIDMANGLEV

BY– ISHAAN GUPTA

ECE-123

03914802810


Outline

OUTLINE


Transrapid manglev

Maglev

Two

Types

Full scale speed

  • 500 km/hr


Transrapid manglev

Types

EMS

Magnetic attraction

Servo-Controlled

Electromagnets

Iron-plate rail


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EDS

Magnetic repulsion

Superconducting

Induction

Cryogenic


Transrapid manglev

EMS system: The German Trans-Rapid TR08 demonstration train and 30 kilometer test track, with operating speeds up to 450 km/hr.


Transrapid manglev

EDS system: The Japanese Yamanashi demonstration train, with speeds of 500 km/hr on a 18 kilometer test track.


Maglev working

Maglevworking


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  • The magnets on the side

  • => Sharper turns

  • An on-Board Master computer

  • => Efficient Levitation


Propulsion system

Propulsion System


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Three Phase Motor GUIDE-WAY


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  • The system consists of aluminum three-phase cable windings in stator packs on guide way.

  • When current is supplied to the windings, it creates a traveling alternating current that propels the train.

  • When AC is reversed, the train brakes.

  • Different speeds are achieved by varying the intensity of the current.

  • Only a section of track of train travel area is electrified.


Transrapid manglev

The Japanese maglev uses superconducting magnets


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  • Lateral Guidance

  • The super conducting magnet induces repulsive-attractive forces keeping the train in the center of the guide way.


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The German Trans-Rapid Maglev


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The Japanese Yamanashi


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Contactless energy

transfer system

Linear electric motor

and guidance system

Magnetic levitation

inductor

Emergency guidance

And braking system

Emergency pavement

Swiss-Metro


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Inductrack System

Lock./07


The inductrack s ystem

The Inductrack System


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Drive &

levitation

coils in

One of 6 magnets

track

(3 front, 3 back)

C-fiber

that provide levitation

cradle

and centering forces

with ribs

to support

Guide rails to prevent

magnetic force

magnets from hitting

Fiberglass I-beam

track prior to levitation

Steel box beam


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Lock./19


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The levitation and drag forces of the Inductrack can be analyzed using circuit theory and Maxwell’s equations


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To analyze the Inductrack we start with the equations for the magnetic field components of a Halbach array

Br = Remanent field (Tesla),

M = no. of magnets/wavelength.

d(m) = thickness of Halbach array magnets,

k = 2π/l


Transrapid manglev

Integrating Bx in y gives the flux linked by the Inductrack circuits and yields equations for the Lift and Drag forces

Newtons/circuit

Newtons/circuit

w = width of Halbach array,

L,R = circuit induct./resistance


Transrapid manglev

Dividing <Fy > by <Fx >yields an equation for the Lift-to-Drag ratio as a function of the track circuit parameters.

The Lift/Drag ratio increases linearly with velocity, and with the L/R ratio of the Inductrack track circuits.


Transrapid manglev

The levitation efficiency (Newtons/Watt) can be determined directly from the equation for the Lift/Drag ratio

Newtons/Watt

Typical K values: K=1.0 to 5.0, depending on track design


Application infocomm

Application InfoComm


Transrapid manglev

  • Safety

  • Virtually impossible to derail.

  • Collisions between trains unlikely


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  • Maintenance

  • Contactless journey..

  • SO,

  • NEARLY NO MAINTAINANCE!!


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  • Comfort

  • The ride at nearly 500km/hr is smooth while not sudden accelerating.

  • (Which, is also unlikely!)


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  • Economic Efficiency

  • The initial investment similar but operating expenses are half.

  • Can take 200-1000 passengers in single run


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  • The linear generators produce electricity for the cabin of the train.


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  • Speed

  • Can travel at about 300 mph.

  • For trips of distances up to 500 miles its total travel time is equal to a planes

  • It can accelerate to 200 mph in 3 miles.

  • =>ideal for short jumps.


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Environment


Maglev vs conventional trains

MagLev vs. Conventional Trains


Summary

Summary

  • Magnetic levitation (maglev) trains have been under development for many years in Germany and Japan for high-speed rail systems.

  • Maglev would offer many advantages as compared to conventional rail systems or inter-city air travel.

  • The cost and complexity of presently developed high-speed maglev trains has slowed their deployment.

  • The Inductrack maglev system, employing simple arrays of permanent magnets, may offer an economic alternative to existing maglev systems.

  • The simplicity of the Inductrack may make it attractive for use in a variety of applications, including urban maglev systems, people movers, and point-to-point shipment of high-value freight

  • The Inductrack, employing Halbach arrays, is an example of a practical application of the results of fundamental studies in magnetics and particle-accelerator physics.


References

References

  • Bonsor, Kevin. “How Maglev Trains Work”. 5 September, 2002. <http://travel.howstuffworks.com/maglev-train.htm>

  • Keating, Oliver. “Maglevs (Magnetically Levitated Trains)”. 16 June, 2000. <http://www.okeating.com/hsr/maglev.htm>

  • Disney Online. “California Screamin’”. August, 1999. <http://disneyland.disney.go.com/disneyland/en_US/parks/attractions/detail?name=CaliforniaScreaminAttractionPage>

  • MagLev Systems. “Electromagnetic Systems”. General Atomics and Affiliated Companies. 2005. <http://www.ga.com/atg/ems.php>.

  • Lockhem tech.

  • http://www.google.com


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