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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

TRANSRAPIDMANGLEV

BY– ISHAAN GUPTA

ECE-123

03914802810

slide3

Maglev

Two

Types

Full scale speed

  • 500 km/hr
slide4

Types

EMS

Magnetic attraction

Servo-Controlled

Electromagnets

Iron-plate rail

slide5

EDS

Magnetic repulsion

Superconducting

Induction

Cryogenic

slide6

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

slide7

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

slide10

The magnets on the side

  • => Sharper turns
  • An on-Board Master computer
  • => Efficient Levitation
slide16

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.
slide18

Lateral Guidance

  • The super conducting magnet induces repulsive-attractive forces keeping the train in the center of the guide way.
slide21

Contactless energy

transfer system

Linear electric motor

and guidance system

Magnetic levitation

inductor

Emergency guidance

And braking system

Emergency pavement

Swiss-Metro

slide27

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

slide29
The levitation and drag forces of the Inductrack can be analyzed using circuit theory and Maxwell’s equations
slide30
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

slide31
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

slide32
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.

slide33
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

slide35

Safety

  • Virtually impossible to derail.
  • Collisions between trains unlikely
slide36

Maintenance

  • Contactless journey..
  • SO,
  • NEARLY NO MAINTAINANCE!!
slide37

Comfort

  • The ride at nearly 500km/hr is smooth while not sudden accelerating.
  • (Which, is also unlikely!)
slide38

Economic Efficiency

  • The initial investment similar but operating expenses are half.
  • Can take 200-1000 passengers in single run
slide40

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.
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