Position detection apparatus
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United States of America Patent
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Apr 3, 2018
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app pub date -
Jan 28, 2016
filing date -
Feb 23, 2015
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Abstract
A Halbach array is formed from first to third magnets provided to a rotor. Of shortest straight-line distances (clearance distances) between the first to third magnets and a Hall element as facing the first to third magnets after moving relative to the first to third magnets, the shortest straight-line distance between the second magnet and the Hall element is set the longest. In other words, the second magnet is placed at a position offset from the first magnet. In addition, the second magnet may be offset from the third magnet.
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