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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.:

US 6779981 B1

PDFFull Text
Date of Patent:
Aug. 24, 2004

Filed:

Jul. 12, 2002

Fan control system using a microcontroller

Applicant:
Inventors:

Wen-Shi Huang, Chungli, TW;

Kuo-Cheng Lin, Taoyuan, TW;

Hsu Kuo Sung, Chungli, TW;

Shou Te Yu, Taoyuan, TW;

Assignee:

Delta Electronics, Inc., Taoyuan Sien, TW;

Attorney:

Thomas, Kayden, Horstemeyer & Risley

Primary Examiner:

Justine R Yu

Assistant Examiner:

Michael K Gray

Int. Cl.
CPC ...
F04B 4/900 ;
U.S. Cl.
CPC ...
F04B 4/900 ;
Abstract

A fan control system. The fan motor is operated normally at not greater than a preset maximum rotation speed. The fan control system has a programmable microcontroller to receive an input voltage and a rotation speed signal corresponding to the actual rotation speed of the fan motor, determining an output signal according to the input voltage and the rotation speed signal, and outputting the output signal; and a fan-driving unit to receive the output signal and adjusting the rotation speed for driving the fan motor according to the output signal. When the rotation speed is lower than a predetermined rotation speed, the rotation speed is in a relation of a first function to the input voltage; when the rotation speed is greater than the predetermined rotation speed, the rotation speed is in a relation of a second function to the input voltage. The first function and the second function are separate mathematical functions, and a first maximum voltage obtained from the maximum rotation speed in the relation of the first function is lower than a second maximum voltage obtained from the maximum rotation speed in the relation of the second function.

Find Patent Forward Citations

Huang, Wen-Shi. (2004). Fan control system using a microcontroller (U.S. Patent No. 6779981). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/6779981

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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