Unstable magnetic reluctance actuator
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United States of America Patent
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May 2, 2017
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app pub date -
Mar 27, 2016
filing date -
May 14, 2015
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Abstract
A magnetic reluctance actuator (MRA) comprising an unstable magnetic reluctance motor (MRM) having a strong force-to-position dependency and a nonlinear force-to-current dependency, the unstable MRM operative to move a lens carrier in a given direction, a lens position sensing mechanism, and a control unit configured to obtain an input from the position sensing mechanism and to provide closed loop control to overcome the strong force-to-position dependency and the nonlinear force-to-current dependency, thereby allowing precise lens position control.
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