Neon Filled Hard Drive to Reduce Power Consumption.
Original Publication Date: 2000-Apr-01
Included in the Prior Art Database: 2003-Jun-19
Described is a method for how the spindle power consumption can be reduced in high performance disk drives. The power consumption in the drive is governed by the windage effects which generate drag forces on the spinning disks. For high performance disk drive the performance can be enhanced by increasing the revolutions per minute (rpm) of the spindle motor. With the same disk drive design the power consumption due to windage effects increases dramatically with rpm. The viscosity and the density of the medium in which the disks in a hard drive spin largely affect the power consumption. Typically the medium consist of ambient air, effectively a mixture of oxygen and nitrogen with. At the same pressure, Neon gas is much lighter than air and therefore will generate much smaller drag forces. Consequently, the power consumption can be reduced. By reducing the operating pressure, the density of the gas medium in which the disks rotate can further be reduced to augment this power reduction effect. 1