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Oral Presentation for Project Proposal - Bradley University ECE ...

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Redesign of Rotary Inductrack <strong>for</strong><br />

Magnetic Train Levitation<br />

<strong>Bradley</strong> <strong>University</strong><br />

Department of Electrical and Computer Engineering<br />

Senior Capstone <strong>Project</strong><br />

Advisor:<br />

Dr. Anakwa<br />

Student:<br />

Glenn Zomchek


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Overview<br />

– Background in<strong>for</strong>mation<br />

– Purpose of Maglev System<br />

– Previous Work<br />

– <strong>Project</strong> Summary<br />

– Physical Design<br />

– Controls<br />

– Parts & Equipment


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Overview (cont’d)<br />

– Specifications <strong>for</strong> New Maglev System<br />

– Issues to Address<br />

– Tentative Schedule<br />

– References<br />

– Patents<br />

– Questions


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Background In<strong>for</strong>mation<br />

The inductrack was first developed by Richard F. Post in<br />

the late 1990’s at Lawrence Livermore National<br />

Laboratory.<br />

– 20 meter test track <strong>for</strong> propulsion


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Purpose of Maglev System<br />

Life-size Life size track and train propulsion system<br />

Low Speed Urban Maglev Program


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Previous Work at <strong>Bradley</strong> <strong>University</strong><br />

2003-2004 2003 2004<br />

– Paul Friend<br />

Initial research<br />

Equations developed<br />

GUI created in MATLAB<br />

Circular wire-rung wire rung inductrack attempted<br />

– Tony Pederson and Toby Miller<br />

Linear wire-rung wire rung inductrack attempted<br />

2005-2006 2005 2006<br />

– Dusty Funk and Kyle Getsla<br />

New support structure created<br />

Laminated sheets inductrack attempted


s<br />

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Small-Scale Small Scale Maglev System<br />

1 st<br />

goal<br />

st goal<br />

<strong>Project</strong> Summary<br />

– To demonstrate levitation<br />

2 nd<br />

goal<br />

nd goal<br />

– To use a position sensor to measure the<br />

displacement in height created by the train levitation.<br />

– Use the signal created as feedback to the AC motor<br />

to control the motor speed, creating a closed-loop<br />

closed loop<br />

system.<br />

– To use a digital <strong>for</strong>ce gauge to measure the <strong>for</strong>ce<br />

needed to levitate the train to a desired height.


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Inductrack: Inductrack<br />

Physical Design<br />

Thin sheets of laminated aluminum<br />

wrapped around bicycle wheel<br />

Slots cut every 2.2 cm to guide<br />

eddy currents<br />

Eddy currents created due<br />

to moving magnetic field


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Maglev Train<br />

Mass = 0.375 kg<br />

Halbach array of magnets<br />

Magnet Strength: 1.21 Tesla<br />

Halbach wavelength, λ = 5.5 cm


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Halbach Array<br />

When the Halbach array passes over the track, current is<br />

induced. The current induced in the track creates the<br />

magnetic field.


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Support Structure<br />

Support structure used in 2005<br />

Mechanical technician,<br />

assistance will be used in<br />

fabrication of new support<br />

structure<br />

(David Miller)


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Controls<br />

Overall System Block Diagram<br />

The Maglev System block consists of the train, Halbach array of<br />

magnets, rotary wheel, control unit, and AC motor.


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Rotary Subsystem Block Diagram<br />

The rotary subsystem consists of AC power coming directly from from<br />

the<br />

wall into a control unit which will control the AC motor. The control control<br />

unit will be compatible with the servo motor and manually set by the<br />

user. The AC motor will be connected to the rotary wheel to<br />

accelerate the wheel to a specified velocity.


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Levitation Subsytem Block Diagram<br />

The levitation subsystem consists of the velocity of the wheel wheel<br />

creating an<br />

induced current which in turn creates an induced magnetic <strong>for</strong>ce to levitate<br />

the train. The feedback path will consist of a levitation constant. constant.


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Servomotor<br />

Parts & Equipment<br />

– Model: Yaskawa SGMGH-20ACB61<br />

SGMGH 20ACB61<br />

Rated Speed: 1000 RPM<br />

Max Speed: 2000 RPM<br />

Rated Voltage: 200 V<br />

Servomotor provided by Robert Ruber


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Parts & Equipment (cont’d)<br />

F7 Motor Drive Unit<br />

– Model: Yaskawa CIMR-F7U41P5<br />

CIMR F7U41P5<br />

Rated Input Voltage: 480 V<br />

Rated Output Current: 3.7 A


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Parts & Equipment (cont’d)<br />

Position Sensor<br />

A position sensor will be<br />

purchased and used to<br />

measure the displacement<br />

of the train due to levitation


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Parts & Equipment (cont’d)<br />

Digital Force Gauge<br />

A <strong>for</strong>ce sensor will be used<br />

to measure the levitation<br />

<strong>for</strong>ce felt by the train


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Specifications <strong>for</strong> New Maglev System


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Issues to Address<br />

Adverse effect of steel rivets on bicycle wheel to<br />

the attraction of the Halbach array of magnets.<br />

Material selection <strong>for</strong> gap creation between steel<br />

rivets and inductrack. inductrack<br />

Wheel rotation with load must exceed ~700 rpm<br />

Stability of support structure to withstand fast<br />

rotational speeds of the wheel with little vibration<br />

Proper sensor placement on the Maglev system


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Fall Semester Schedule<br />

Weeks 1-2 1<br />

Development of functional description<br />

deliverable. Research on previous<br />

Maglev work along with personal<br />

verification measurements.<br />

Weeks 3-5 3<br />

Development of specifications<br />

deliverable. Parts research <strong>for</strong> motors,<br />

position sensors, and <strong>for</strong>ce sensors.<br />

Development ideas <strong>for</strong> new Maglev<br />

system.<br />

Weeks 6-7 6<br />

Preparation <strong>for</strong> project proposal and<br />

oral presentation. Collaboration with<br />

mechanical technician <strong>for</strong> support<br />

structure rebuild.


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Spring Semester Tentative Schedule<br />

Weeks 1-2 1<br />

Collaboration with mechanical<br />

technician <strong>for</strong> support<br />

structure rebuild.<br />

Weeks 3-5 3<br />

Complete Maglev system<br />

construction.<br />

Weeks 6-10 6 10 Train levitation. Experimental<br />

tests and measurements.<br />

Weeks 11-14 11 14 Development of feedback<br />

signals to create a closed-loop<br />

closed loop<br />

system. Preparation <strong>for</strong> oral<br />

presentation and final project<br />

report.


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References<br />

[1] Paul Friend’s Senior <strong>Project</strong> Magnetic Levitation Technology 1 Final Report,<br />

12 May, 2004.<br />

[2] Paul Friend’s Senior <strong>Project</strong> <strong>Proposal</strong>, 12 December, 2003.<br />

[3] Paul Friend’s <strong>Project</strong> <strong>Proposal</strong> <strong>Presentation</strong>, 9 December, 2003. 2003.<br />

[4] Dusty Funk & Kyle Getsla’s Senior <strong>Project</strong> Magnetic Levitation Train<br />

Final Report, 2005.<br />

[5] Halbach, Halbach,<br />

K., “Applications of permanent magnets in accelerators and electron electron<br />

storage rings,” Journal of Applied Physics, Physics,<br />

vol. 57, p. 3605, 1985.<br />

[6] Post, Richard F., Ryutov, Ryutov,<br />

Dmitri D., “The Inductrack Approach to<br />

Magnetic Levitation,” Lawrence Livermore National Laboratory.<br />

[7] Yaskawa Electric Corporation. “User’s Manual,” Servo Selection and Data<br />

Sheets, Sheets,<br />

October, 2000.


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Patents<br />

Richard F. Post<br />

Magnetic Levitation System <strong>for</strong> Moving Objects<br />

U.S. Patent 5,722,326<br />

March 3, 1998<br />

Richard F. Post<br />

Inductrack Magnet Configuration<br />

U.S. Patent 6,633,217 B2<br />

October 14, 2003<br />

Richard F. Post<br />

Inductrack Configuration<br />

U.S. Patent 629,503 B2<br />

October 7, 2003<br />

Richard F. Post<br />

Laminated Track Design <strong>for</strong> Inductrack Maglev System<br />

U.S. Patent Pending US 2003/0112105 A1<br />

June 19, 2003<br />

Coffey; Howard T.<br />

Propulsion and stabilization <strong>for</strong> magnetically levitated vehicles<br />

U.S. Patent 5,222,436<br />

June 29, 2003<br />

Coffey; Howard T.<br />

Magnetic Levitation configuration incorperating<br />

levitation, guidance and linear synchronous motor<br />

U.S. Patent 5,253,592<br />

October 19, 1993<br />

Levi;Enrico; Zabar;Zivan;<br />

Air cored, linear induction motor <strong>for</strong> magnetically levitated<br />

systems<br />

U.S. Patent 5,270,593<br />

November 10, 1992<br />

Lamb; Karl J. ; Merrill; Toby ; Gossage; Scott D. ; Sparks;<br />

Michael T. ;Barrett; Michael S.<br />

U.S. Patent 6,510,799<br />

January 28, 2003


Questions?<br />

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