Magnetically levitated robot and method of increasing levitation force
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United States of America Patent
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Nov 9, 1999
Grant Date -
N/A
app pub date -
Sep 18, 1996
filing date -
Sep 18, 1996
priority date (Note) -
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Abstract
A magnetically levitated transport device provides levitation and propulsion of a vacuum carriage. An air carriage is moved by conventional means through both linear and angular displacements. Non-magnetic coils mounted on the air carriage interact with permanent magnets mounted on the vacuum carriage to magnetically link the carriages together using Lorentz forces. The non-magnetic coils, which are exposed to the fields generated by the permanent magnets, produce the Lorentz forces when driven by drive currents in response to inputs received from position sensors. In one embodiment, power requirements are reduced by adding permanent magnets to the air carriage that interact with some of the permanent magnets on the vacuum carriage to provide forces that substantially levitate all of the static load.
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