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US 10,622,929 B2Granted
Reluctance-type rotary actuators
AssigneeHamilton Sundstrand Corporation
InventorJacek F. Gieras
Life of this patent
Estimating the term…
Abstract
An actuator includes a yoke extending about a rotation axis. A coil is wrapped about the yoke. A rotor having a direct axis and a quadrature axis is supported for rotation about a rotation axis relative to the yoke. The rotor has a reluctance along the direct axis that is different than a reluctance along the quadrature axis to rotate the rotor when current is applied to the coil.
Claims18
An actuator, comprising:
- a yoke extending about a rotation axis;
- a coil wrapped about the yoke;
- and
- a rotor having a direct axis and a quadrature axis supported for rotation about the rotation axis, wherein a reluctance along the rotor direct axis is different than a reluctance along the quadrature axis, the actuator configured to rotate the rotor when current is applied to the coil, wherein the rotor includes at least one internal void and at least one internal inclusion, including a non-ferromagnetic material, that makes reluctance along one of the direct and quadrature axes different than that along the other of the direct and quadrature axes.
1 more element
A method of actuating a device, comprising:
- applying current to coil;
- generating a magnetic flux using the current flow through the coil;
- and
- aligning a rotor supported for rotation with the magnetic flux according to different reluctances arranged along direct and quadrature axes of the rotor, wherein the rotor has at least one internal void and at least one internal inclusion, including a non-ferromagnetic material, that makes reluctance along one of the direct and quadrature axes different than that along the other of the direct and quadrature axes.
1 more element
Dependencies are inferred from the claim text.