Magnetless actuator for disc drive
AssigneeSeagate Technology LLC
InventorsTak Koon Ooi, Kevin Arthur Gomez, Xiong Liu, Kwee Teck Say, Choon Kiat Lim
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Abstract
A magnetless rotary actuator for carrying one or more read/write heads across a data bearing medium, the rotary actuator comprising: a stator including a plurality of independently controllable flux generating means for directing flux between the stator and a rotor; the rotor including means for presenting discrete regions of low magnetic reluctance to the controllable flux generating means; torque coupling means for transmitting operative torque from the rotor to the read/write head; and pivot means for supporting the torque coupling means.
Claims20
A magnetless rotary actuator for carrying one or more read/write heads across a data bearing medium, the rotary actuator comprising:
- a stator including a plurality of independently controllable flux generating elements;
- a rotor including discrete regions of low magnetic reluctance for interacting with the flux generating elements;
- an actuator arm for transmitting operative torque from the rotor to the read/write head;
- and
- a pivot assembly for rotatably supporting the actuator.
A disc drive, comprising:
- a base;
- a disc rotatably mounted to the base;
- a rotary actuator for carrying a read/write head over a surface of the disc, the actuator being mounted to the base for rotation about a pivot point, the actuator comprising:
- a stator having a number of stator teeth projecting toward the pivot point, each of the teeth having wound thereon an independently energizable coil;
- a rotor including a number of rotor teeth projecting away from the pivot point towards the stator teeth thereby defining a gap therebetween;
- and
- an elongate actuator arm pivotable about the pivot point, the arm being coupled to the rotor at a first end and configured to be coupled to the read/write head at a second opposite end.
A disc drive comprising:
- a base;
- an actuator rotatably mounted to the base about a pivot point;
- and
- means for moving the actuator about the pivot point.
Dependencies are inferred from the claim text.