Magnetic levitation
Upcoming SlideShare
Loading in...5
×
 

Magnetic levitation

on

  • 5,992 views

Magnetic Levitation theory and application based on levitation such as train ,toy,turbine etc.

Magnetic Levitation theory and application based on levitation such as train ,toy,turbine etc.

Statistics

Views

Total Views
5,992
Views on SlideShare
5,991
Embed Views
1

Actions

Likes
4
Downloads
471
Comments
3

1 Embed 1

http://www.linkedin.com 1

Accessibility

Categories

Upload Details

Uploaded via as Microsoft PowerPoint

Usage Rights

© All Rights Reserved

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
    Processing…
Post Comment
Edit your comment
  • Thank you…..

Magnetic levitation Magnetic levitation Presentation Transcript

  • MAGNETIC LEVITATION
    PRESENTED BY:
    VIVEK KUMAR DUBEY
    EN-F (3RDYEAR)
    • Magnetic levitation, maglev, or magnetic suspension is a method by which an object is suspended above another object
    with no support other than magnetic field .
    • The electromagnetic force is used to counteract the effects of the gravitational force.
  • Direct Diamagnetic Levitation – How it Works
    Diamagnetic materials repel a magnetic field
    All materials have diamagnetic properties, but the effect is very weak, and usually overcome by the object‘s paramagnetic or ferromagnetic properties, which act in the opposite manner
    By surrounding a diamagnetic material with a magnetic field, it can be held in a stationary position (the magnetic force is strong enough to counteract gravity)
  • Direct Diamagnetic Levitation – Applications
    Water is primarily diamagnetic, so water droplets and objects that contain large amounts of water can be levitated
  • MAGLEV METHODS
    · Repulsion between like poles of permanent magnets or
    electromagnets.
    · Repulsion between a magnet and a metallic conductor
    induced by relative motion.
    · Repulsion between a metallic conductor and an AC
    electromagnet.
    · Repulsion between a magnetic field and a diamagnetic
    substance.
    · Repulsion between a magnet and a superconductor.
    · Attraction between unlike poles of permanent magnets or
    electromagnets.
    · Attraction between the open core of an electromagnetic
    solenoid and a piece of iron or a magnet.
    · Attraction between a permanent magnet or electromagnet
    and a piece of iron.
    · Attraction between an electromagnet and a piece of iron or
    a magnet, with sensors and active control of the current to
    the electromagnet used to maintain some distance between
    them.
    · Repulsion between an electromagnet and a magnet, with
    sensors and active control of the current to the
    electromagnet used to maintain some distance between
    them.z
    MAGLEV METHODS
    • · Repulsion between like poles of permanent magnets or electromagnets.
    • · Repulsion between a magnet and a metallic conductor induced by relative motion.
    • · Repulsion between a metallic conductor and an AC electromagnet.
    • · Repulsion between a magnetic field and a diamagnetic substance.
    • · Repulsion between a magnet and a superconductor.
    • · Attraction between unlike poles of
    permanent magnets or electromagnets.
    • · Attraction between the open core of an
    electromagnetic solenoid and a piece of
    iron or a magnet.
    • · Attraction between a permanent magnet
    or electromagnet and a piece of iron.
  • Super Levitron
    • Two opposing neodymium-iron-boron permanent magnets.
    • Invention by Roy Harrigan.
    • The rotation of a spinning object’s axis of spin creates a torroid of genuine stability.
    • The top remain levitating in a central point in space above the base where the forces acting on the top- gravitational, magnetic, and gyroscopic- are in equilibrium
    • Stops due to air resistance
  • Why it works???
    • The principle
    Two similar poles repel, and two different poles attract, with forces that are stronger when the poles are closer.
    There are four magnetic forces on the top.
    The north-north repulsion dominates, and the top is magnetically repelled.
    It hangs at the point of equilibrium where the total force is zero.”
  • The Future
    Magnetic Levitation
  • Applications
    Maglev Trains- The magnetized coil running along the track, repels the large magnets on the train's undercarriage, allowing the train to levitate
    Biomagnetism- in MRI
    Particle accelerators to accelerate sub-atomic particles to nearly the speed of light
    In petaflop computers. A petaflop is a thousand-trillion floating point operations per second.
  • NASA
    Maglev technology could give space vehicles a “running start” to break from Earth’s gravity
  • Maglev Space Propulsion
    Launching systems would use magnetic fields to levitate and accelerate a vehicle along a track .
    Reaching the end of the track, the vehicle could switch to more conventional rocket engines.
  • The History
    Magnetic Levitation Vehicles
    • 1750 – John Mitchell conducted the first experiments measuring the magnetic forces between the poles of a magnet .
    • 1900 – Robert Goddard and Emile Bachelet conceive the concept of frictionless trains.
    • 1969 – American scientist James R. Powell and Gordan T. Danby patented the first design for Maglev trains.
  • 1990 – The initial phase of the Yamanashi Maglev Test Line commences.
  • Magnetic Levitation Wind Turbine
    Maximum overall efficiency of windmill is 30%.
    The remaining energy is mainly lost in friction.
    If the same windmill is operating at 50% of its maximum speed the efficiency becomes very low.
    • Due to wear and tear performance of the machine deteriorates.
    • Normal windmill can start its generation from wind speed of 3 m/s. But windmill
    using magnetic levitation can start
    generation from wind speed of
    1.5m/s.
  • ADVANTAGES OF MAGLEV
    transportation
    • No surface contact or friction to slow them
    down. More speed = More passengers.
    • Faster trips
    • High reliability
    • Petroleum independence with respect to air
    and auto as a result of being electrically
    powered.
    .
    • Less polluting
    • Potential for high
    capacities at 3-4 minutes headways.
    • High safety.
    • Convenient– due to high
    frequency of service, vibration free
    train rides and quieter.
    • At speeds below 249.4 kmph
    the noise produced by Maglev trains
    is less than that by conventional
    trains. At speeds above 155 mph,
    most of the noise produced by vehicle
    is of aerodynamic origin, whether it is
    on rail or levitated.
  • Thank you…..