US Patent No. 10,342,157

FAN CONTROL OF A COMPUTER SYSTEM BASED ON POWER RATIO


Patent No. 10,342,157
Issue Date July 02, 2019
Title Fan Control Of A Computer System Based On Power Ratio
Inventorship Shih-Chen Chang, Taipei (TW)
Chih-Pao Chang, Taipei (TW)
Marcus A. Kelly, Kirkland, WA (US)
Yu-Chen Kung, Taipei (TW)
Chen-Wei Lee, Taipei (TW)
Guo-Sheng Mo, Taipei (TW)
Ming-Hui Pan, Taipei (TW)
Su-Jen Tsai, Taipei (TW)
Assignee INTERNATIONAL BUSINESS MACHINES CORPORATION, Armonk, NY (US)

Claim of US Patent No. 10,342,157

1. A method for controlling a fan, the method comprising:controlling a rotation speed and acceleration and deceleration of a fan according to a first rotation speed time-variable rate by a controller, wherein the first rotation speed time-variable rate is a first acceleration rate or a first deceleration rate of the fan, wherein a rotation speed time-variable rate comprises a time for a rotation speed of the fan to change from a first speed to a second speed;
determining a change in a value of an operating parameter of a target device, wherein the operating parameter is a consumed power of the target device;
determining a time-variable rate of the fan rotation speed according to the change in the value of the operating parameter, wherein determining the time-variable rate of the fan rotation speed comprises determining the time-variable rate of the fan rotation speed according to a ratio of the consumed power of the target device to the rated power of the target device;
setting, by the controller, a second rotation speed time-variable rate of the fan rotation speed in response to the change in the value of the operating parameter of the target device, wherein the second rotation speed time-variable rate is based on the determined time-variable rate of the rotation speed of the fan and is a second acceleration rate or a second deceleration rate of the rotation speed of the fan; and
controlling the rotation speed and acceleration or deceleration of the fan according to the second rotation speed time-variable rate by the controller in response to setting the second rotation speed time-variable rate of the fan rotation speed,
wherein the fan and target device are for use in a computer system.