Moving material electric control device
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United States of America Patent
Stats
-
Mar 31, 2009
Grant Date -
Oct 26, 2006
app pub date -
Apr 19, 2006
filing date -
Apr 26, 2005
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A motor comprises a yoke as casing, a shaft extending along a center of the yoke, an annular stator fixed to the yoke and an armature fixed to the shaft to rotate with the shaft inside the stator. The armature comprises a plurality of teeth on the outer circumferential surface. A wire is wound on any of the teeth to form a normal coil. Another wire is wound on another of the teeth to form a brake coil that is a short circuit. When the motor rotates much faster, the brake coil produces magnetic flux which acts as load against the rotation of the motor to allow the motor to rotate slower.
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