Linear motor
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United States of America Patent
Stats
-
Jul 17, 1984
Grant Date -
N/A
app pub date -
May 18, 1981
filing date -
May 19, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A linear motor comprises an armature and a stator each adapted to provide a sequence of North and South poles along the length of the motor. The pole pitch of the stator magnets is different from that of the armature coils such that with appropriate energization of the coils this difference in pole pitch and stator can result in a net thrust of the armature relative to the stator in a desired direction at any location within a range of relative longitudinal positions of the armature and stator. The motor may be subject to closed loop velocity--and/or positional control and means are disclosed to achieve this. Several variations in pole configurations and means of controlling the coil energization are disclosed.
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Cited Art Landscape
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