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MAGNETIC LEVITATION TRAIN TECHNOLOGY II. STUDENTS: TONY PEDERSON & TOBY MILLER ADVISOR: DR. WINFRED ANAKWA. TABLE OF CONTENTS. PROJECT SUMMARY PROJECT DESCRIPTION STANDARDS PROJECT DESCRIPTION SCHEDULE OF TASKS. PROJECT SUMMARY.

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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

  • 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 Array’s 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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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 =.2*wavelength (lambda)

Optimum wavelength = 4*pi*y1 (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.


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