Disk drive power management system

Details Disk drive power management system Disk drive power management system

1992-12-04

1995-10-10

Shoop, Jr., William M.

Electricity: motive power systems

Motor load, armature current or force control during...

318812, 318278, 318279, 318504, 307130, 323901, 363 49, G11B 1904

Patent

active

054573653

ABSTRACT:
A computer having a hard disk drive includes a battery voltage monitor which establishes a shut down condition of the computer if the supply voltage falls below a chosen level V.sub.L. Upon start up of the hard disk drive motor, current through the motor is limited so that supply voltage of the battery to a computer does not fall below level V.sub.1, which level is greater than the level V.sub.L. Additionally during start up, current in the motor is controlled so that voltage supplied by the battery to the computer does not rise above a threshold level V.sub.2 which is greater than V.sub.1.

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