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US 2008/0174185 A1Published application
Detent Force Correcting
AssigneeBose Corporation
InventorMarco Giovanardi
Life of this patent
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Abstract
An apparatus comprises a linear electromagnetic actuator which has a series of ferromagnetic poles, coils, and a series of permanent magnets to interact with the poles to induce movement of the actuator along a path. The poles have non-uniform configurations.
Claims16
An apparatus comprising
- a linear electromagnetic actuator having a series of ferromagnetic poles, coils, and a series of permanent magnets to interact with the poles to induce movement of the actuator along a path,
- the poles having non-uniform configurations.
A method comprising
- driving a linear electromagnetic actuator comprising poles having non-uniform configurations, and
- reducing a detent force between an armature and a stator of the actuator so that a force output of the actuator is substantially constant over a range of motion of the actuator.
A method comprising
- configuring at least some poles of a linear electromagnetic actuator differently from other poles to reduce a detent force that occurs when an armature of the actuator is moved along a path.
An active suspension system for a vehicle comprising
- a linear electromagnetic actuator having a series of poles and a series of electromagnets to interact with a series of permanent magnets to induce movement of the permanent magnets along a path, the poles having non-uniform configurations, and
- a mounting assembly for coupling the actuator between the body of the vehicle and a wheel assembly.
Dependencies are inferred from the claim text.