Low damping torque brushless D.C. motor
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United States of America Patent
Stats
-
Mar 22, 1988
Grant Date -
N/A
app pub date -
Sep 22, 1986
filing date -
Sep 22, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A brushless D.C. motor, suitable for use as a hand-held surgical tool, includes a field of self-supporting coils arranged between a pair of impregnated fiberglass epoxy sheets situated in an air gap formed by a rotatable shaft having an even-number plurality of magnets formed thereon, and a non-electrically conductive housing. The individual magnets abut one another upon the shaft to prevent a magnetic return path from the substantially unidirectional field produced thereby, and are formed in relationship to the coils such that a single rotor pole will never be under a single coil, in order to minimize induced shorted currents.
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Cited Art Landscape
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