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Small-Scale Implementation of Magnetic Levitation Train

Nathan BlackBen JamesGreg KooVivek KumarPreston Rhea

Wednesday, April 22, 2009

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Overview

Objectives:• Levitation• Stabilization• Propulsion

• Proof-of-concept• Build awareness• Project cost: $523

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State-of-the-Art: AMT

American Maglev Tech. Name Team Maglev

125 mph Top Speed 1.4 ft/s

50 tons Weight 0.5 lb

< $20 Million/Mile Cost $523

System Components• AC Drive• LSM • Track rails

AC Drive

LSM

AC Reactor

Power Resistors

Track Rails

Design Changes – Levitation, Stabilization

Track rails with magnets– Magnets spin along one rail

– Ball bearings

– Spacers

– Optimal rail spacing

Design Changes - Propulsion

• LSM Windings– 5 wires per phase (18 gauge) to increase

magnetic field strength of LSM– Provide uniform propulsion

• Train Car– Halbach array 4 disc magnets

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Performance – AC Drive• Sinusoidal output current desired

• AC reactor utilized to smooth drive output

• Peak output current: 10 A

• Output Voltage: 208Vrms

• Frequency range used: 2.7 Hz – 5.5 Hz

dtdiL

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Performance – LSM Secondary

• Lorentz Force I= 10 A, B= 1.2 T, L= 0.0195m LBIF

Secondary

Primary

• Max Force (single wire)

• Force (5 wires) = 0.051*5 = 0.255lbf

lbfNF 051.02286.001905.2.110

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Performance – LSM

Optimal air gap: 2 mmMax air gap: 4 mmCurrent: 9.1 AFrequency: 5.5 Hz

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Design ObjectivesCriteria Proposed

SpecificationsAchieved Specifications

Levitation No contact between train and track

Vertical levitation with horizontal contact

Vertical Stability +/- 6 mm +/- 1 mmHorizontal Stability

+/- 4 mm +/- 0 mm

Torsional Stability

+/- 10 degrees +/- 0 degrees

Propulsion 0 - 5 mph 0 -1 mph

Train Loading Must support 0.5 lbs Supported 0.11 lb

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Material CostsProduct CostNeodymium Magnets

Free

Magnetic Strip $18018 Gauge Wire

$70

AC Drive $255AC Reactor Free

Balsa Wood $5Bearings $13Total Cost $523

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Discussion – Project Conclusion

•2 failed designs

•Pseudo-maglev achieved

•Good platform for future senior design projects

Our Design Electrodynamic Suspension

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Future Project - Video

Video

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Questions?