Rotary single-phase electromagnetic servo actuator comprising an actuator and a position sensor
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United States of America Patent
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Jul 17, 2012
Grant Date -
Aug 21, 2008
app pub date -
Jun 15, 2006
filing date -
Jun 15, 2005
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Abstract
The invention concerns a rotary single-phase electromagnetic servo actuator consisting of a rotary actuator designed to move a mobile member along a limited travel, including a 2N pole stator structure, N being equal to 1 or 2, and at least one field coil, said stator structure being made of a material with high magnetic permeability, and a rotor having a ferromagnetic yoke and a thin magnetized portion consisting of 2N pairs of axially magnetized poles, in alternate directions and a rotor angular position sensor. The invention is characterized in that the position sensor has a magnetic field emitter integral with the yoke and a receiver for the magnetic field stationary relative to the stator structure.
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