Title:
【発明の名称】改良されたサーボ制御用の能動的磁気軸受装置
Document Type and Number:
Japanese Patent JP2002542554
Kind Code:
A
Abstract:
Apparatus and method for improved servo control in a disc drive. The disc drive includes a rotatable disc, a moveable actuator which supports a head adjacent the disc, and a stationary active magnetic bearing assembly which uses bearing coils to levitate the actuator. An active magnetic bearing control circuit applies currents to the bearing coils, and a servo control circuit applies current to an actuator motor to position the head with respect to the disc. The active magnetic bearing control circuit outputs a disturbance signal when a disturbance affects the relative positioning of the actuator and the bearing assembly, and this disturbance signal is fed forward into the servo control circuit. Conversely, the servo control circuit provides a seek expectancy signal to the bearing control circuit to enable the bearing control circuit to compensate for torque forces applied by the actuator motor.
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Inventors:
Elle, Travis, Yi
Application Number:
JP2000612932A
Publication Date:
December 10, 2002
Filing Date:
April 19, 2000
Export Citation:
Assignee:
Seagate Technology LLC
International Classes:
F16C32/04; F16C39/06; G11B5/48; G11B5/55; G11B5/588; G11B5/596; G11B21/02; (IPC1-7): G11B21/02; F16C32/04
Attorney, Agent or Firm:
Akira Asamura (3 outside)