Disk drive employing method of spinning down its spindle motor t

Details Disk drive employing method of spinning down its spindle motor t Disk drive employing method of spinning down its spindle motor t

1999-02-23

2000-08-15

Masih, Karen

Electricity: motive power systems

Braking

318364, 318138, 318254, 318439, 360 7303, 360 75, H02K 710

Patent

active

06104153&

ABSTRACT:
A disk drive employs a method of operating a spindle motor to respond to a spin-down command to reduce the time required for spinning down and subsequently spinning up the spindle motor. The disk drive is connectable to a power supply having a fixed DC voltage. The spindle motor includes a stator having a plurality of windings and a rotor rotatable at a variable spin-rate. The rotor has an angular position relative to the stator. The disk drive includes switching elements coupled to the fixed DC voltage and the plurality of windings. The switching elements are controlled to sequentially apply the fixed DC voltage across a selected combination of the windings to generate a negative torque on the rotor such that a controlled braking operation is performed to decelerate the rotor to a selected spin-rate .omega.1. After the variable spin-rate is reduced to the selected spin-rate .omega.1, the switching elements are controlled to apply the fixed DC voltage across at least one of the windings such that a controlled rotor-stopping operation is performed to control the angular position of the rotor when the rotor comes to a stop at the end of the controlled rotor-stopping operation.

REFERENCES:
patent: 5223771 (1993-06-01), Chari
patent: 5397971 (1995-03-01), McAllister et al.
patent: 5397972 (1995-03-01), Maiocchi
patent: 5471353 (1995-11-01), Codilian et al.
patent: 5530326 (1996-06-01), Galvin et al.
patent: 5623379 (1997-04-01), Nishimura et al.
patent: 5650886 (1997-07-01), Codilian et al.
patent: 5808440 (1998-09-01), Bennett et al.
patent: 5874796 (1999-02-01), Petersen
patent: 6034496 (2000-03-01), Male
Raffi Codilian, Don Stupeck--"A Multi Mode Spindle Selection Within a Disk Drive System," Incremental Motion Control Systems Symposium, 1995.
Raffi Codilian, Don Stupeck--"An Optimization Method of Spindle Motor and Driver Selection Within a Disk Drive System," Incremental Motion Systems Symposium, 1995.

Affiliated with

Also associated with

Rating

Disk drive employing method of spinning down its spindle motor t does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Disk drive employing method of spinning down its spindle motor t, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Disk drive employing method of spinning down its spindle motor t will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2010294