MAGNETIC LEVITATION TRAIN

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MAGNETIC LEVITATION TRAIN TECHNOLOGY II
STUDENTS TONY PEDERSON TOBY MILLER ADVISOR
DR. WINFRED ANAKWA
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TABLE OF CONTENTS

• PROJECT SUMMARY
• PROJECT DESCRIPTION
• STANDARDS
• PROJECT DESCRIPTION
• SCHEDULE OF TASKS

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PROJECT SUMMARY

• The goal of the project is to design a model
  size train to will be levitated and propelled by
  electromagnetism. A special magnet array called
  a Halbach array will be utilized along with a
  linear synchronous motor to make this train
  operate.

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STANDARDS

• ENVIRONMENTAL STANDARDS
• Reduction in pollution in the area where they
  will be used will out way the increased pollution
  crated by power plants to power the trains.
• SAFETY STANDARDS
• Must prove that the new technology is safe to use.

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PROJECT DESCRIPTION

• BLOCK DIAGRAM
• TRAIN
• TRACK
• ELECTRODYNAMIC SUSPENSION
• HALBACH ARRAY
• LINEAR SYNCHRONOUS MOTOR
• CONTROLLER

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BLOCK DIAGRAM
TRAIN WITH SPEED SENSOR
CONTROLLER
FREQUENCY REFERENCE SIGNAL FOR SPEED CONTROL
THREE-PHASE POWER INPUT
TRACK
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TRAIN AND TRACK
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TRAIN

• Made out of aluminum to minimize weight
• 4 rows of 8 magnets arranged in a Halbach Array
• 2 rows for levitation
• 2 rows for lateral guidance and propulsion
• May or may not have speed sensor. This will be
  determined later

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TRACK

• 2 aluminum guide ways
• Wires will be wrapped around guide way to provide
  the levitation circuits
• A G scale model railroad track will be laid
  between guide ways to provide support for take
  off and stopping.
• A linear synchronous motor will be attached to
  the track to provide propulsion

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ELECTRODYNAMIC SUSPENSION

• The magnets on the train produce currents while
  traveling in the guide way. This uses repulsion
  to guide and support the train, but will need a
  support for landing and takeoff since EDS
  does not work below 25 mph on a full size train.
  The minimum speed for levitation will be
  determined later once the train is built. It has
  been determined to be a function of magnet size
  and weight.

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HALBACH ARRAY
Halbach Arrays are a special arrangement that
cancels the magnetic field above the magnets, but
still allows a field below the magnets. The
permanent magnets that will be using are made out
of Neodymium Iron Boron (NdFeB)
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HALBACH ARRAY
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HALBACH ARRAY
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LINEAR SYNCHRONOUS MOTOR

• Same principle as a rotary synchrounous motor
• The rotor will be the Halbach Array
• The stator will be coils of wire on the sides of
  the guide way
• The input will be a three-phase varying
  frequency signal at a very low frequency (2-10
  hz)

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PRELIMINARY WORK

• Almost all time has been spent on research
• IEEE Transactions have been very helpful
• No track calculations have been made. The train
  has to be built first to determine weight of
  train.

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EQUATIONS USED
OPTIMUM MAGNET THICKNESS .2wavelength (lambda)
Optimum wavelength 4piy1 (m) y1 levitation
height (lambda) Br (Tesla) remanent field of
the permanent magnet
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PREDICTED TIMELINE SPRING SEMESTER

• WEEK 1 - BUILD THE TRAIN.
• WEEKS 2-4 - FINISH DESIGNING TRACK AND BUILD IT.
  
• WEEKS 5-12 - TESTING AND DESIGNING A CONTROLLER.
• WEEKS 13-16 PREPARING FOR FINALE PRESENTATION.