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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Aug 6, 2013
Grant Date -
Dec 27, 2012
app pub date -
Jun 22, 2012
filing date -
Jun 15, 2005
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Abstract
A single phase electromagnetic servo-actuator that includes a rotary actuator which moves a mobile member along a limited travel including a 2N ferromagnetic pole stator structure and at least one excitation coil, the stator structure being made of a material with high magnetic permeability and a rotor having ferromagnetic yoke and a thin magnetized portion of 2N pairs of axially magnetized poles, in alternate directions, and a rotor angular position sensor, the thin magnetized portion being a separate element from the ferromagnetic yoke.
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