Position detector for moving magnet type linear motor
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United States of America Patent
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Jun 3, 2014
Grant Date -
Apr 19, 2012
app pub date -
Dec 25, 2009
filing date -
Jun 29, 2009
priority date (Note) -
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status (Latency Note)
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Abstract
In a moving magnet type linear motor including a stator with a plurality of coils placed in one direction and a mover with a permanent magnet opposed to the stator, a position detector detects the position of the mover. The position detector includes a magnetic body fixed to the mover. One or two or more coils are selected and a voltage is applied to the selected coil while a current or a voltage induced in a coil adjacent to the selected coil is measured, and the position of the magnetic body that changes in response to the position of the mover is determined based on the measured current or the measured voltage.
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