Systems and methods for operating a linear motor to prevent impacts with hard stops
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United States of America Patent
Stats
-
Nov 26, 2019
Grant Date -
Sep 13, 2018
app pub date -
May 10, 2018
filing date -
Jul 16, 2016
priority date (Note) -
In Force
status (Latency Note)
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Abstract
Systems and methods for operating a linear motor (e.g., for an ESP), where the motor's mover moves in a reciprocating motion within a bore of the stator. Hard stops are located at the ends of the bore. The motor has a first set of sensors in the stator positioned proximate to the bore. When the mover moves in the bore, the sensors produce corresponding output signals, except when the mover is in a position near, but not in contact with a hard stop. While the sensors produce output signals, the motor is driven in a first direction toward the hard stop. When the sensors stop producing the output signals, the mover has reached the first position, and the motor is controlled to reverse the direction of the mover.
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