Bi-polar disk torquing system for a disk drive to free stuck tra

Details Bi-polar disk torquing system for a disk drive to free stuck tra Bi-polar disk torquing system for a disk drive to free stuck tra

1994-07-13

1995-03-14

Ro, Bentsu

Electricity: motive power systems

Switched reluctance motor commutation control

318281, 318282, 369 4427, 360 7303, 360 75, 360 9807, H02P 602, G11B 2102

Patent

active

053979710

ABSTRACT:
A multiple pole, multiple phase, sensorless DC disk spindle motor in a disk drive is powered by direct current which is commutated among the motor phases from a DC power supply to start the motor and to rotate the disks at constant speed in a predetermined direction whenever the disk drive is in use. When the motor is prevented from rotating by the stiction bond of one or more transducers which have adhered to the disks, the direct current is reversibly commutated among the motor phases near the resonant frequency, a predetermined number of times, to produce substantially sinusoidal, bi-polar motor torques to achieve torque amplification to break the stiction bonds. Following the last of the predetermined number of reversible commutations of direct current, direct current commutation is initiated among the motor phases to rotate the motor and the disks in the desired direction at constant speed.

REFERENCES:
patent: 4507590 (1985-03-01), Miyazaki
patent: 4839754 (1989-06-01), Gami et al.
patent: 4912378 (1990-03-01), Vukosavic
patent: 4922169 (1990-05-01), Freeman
patent: 4970610 (1990-11-01), Knappe
patent: 5017845 (1991-05-01), Carobolante et al.
patent: 5057753 (1991-10-01), Leuthold et al.
patent: 5128913 (1992-07-01), Fennema et al.
patent: 5202614 (1993-04-01), Peters et al.
patent: 5202616 (1993-04-01), Peters
patent: 5202616 (1993-04-01), Peters
patent: 5208712 (1993-05-01), Hatch et al.

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