High efficiency electromagnetic coil apparatus and method
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United States of America Patent
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Apr 21, 1992
Grant Date -
N/A
app pub date -
Sep 28, 1989
filing date -
Sep 28, 1989
priority date (Note) -
Expired
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Abstract
An electromagnetic coil is wound on a circular mold and potted with a potting compound in order to eliminate the bobbin which is used with prior art electromagnetic coils. The potting technique can be advantageously applied to coils wound on any shape mold and to coils wound with wire of any cross-sectional shape. In the preferred embodiment the 'bobbinless' coil is wound on a cylindrical mold and uses wire which has been partially flattened to improve the density of the coil. The flattened wire is preferably made by flattening ordinary wire copper to an aspect ratio of about 1.5. In an alternate embodiment, the bobbinless coil is wound with ordinary circular wire. In the preferred embodiment, the bobbinless coil forms part of a linear motor for use in driving the movable mirror in an interferometer spectrometer. In this application the coil provides a strong flux density and a strong force, yet occupies a relatively small volume.
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