The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 01, 2009
Filed:
Dec. 27, 2007
Chu Te Chung, Cary, NC (US);
C. Charles Dishman, Raleigh, NC (US);
Jen-ching Lin, Apex, NC (US);
Eino A. Lindfors, Raleigh, NC (US);
Chu Te Chung, Cary, NC (US);
C. Charles Dishman, Raleigh, NC (US);
Jen-Ching Lin, Apex, NC (US);
Eino A. Lindfors, Raleigh, NC (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
An apparatus, system, and method are disclosed for controlling fan speed. A power sensing module senses input voltage and current of a power supply. The power supply includes one or more stages and regulates at least one output bus. A power calculation module calculates input power from the input voltage and the input current. A temperature sensing module senses an ambient temperature and/or a temperature at a component cooled by a fan. A fan speed calculation module calculates a fan speed signal for the fan. The fan speed signal is a function of the input power calculated by the power calculation module and the sensed temperature sensed by the temperature sensing module for at least a portion of a fan speed range. A fan speed transmission module transmits the fan speed signal to the fan and adjusts a fan speed based on the fan speed signal.