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