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:
Aug. 21, 2012
Filed:
Mar. 26, 2009
Alex Horng, Kaohsiung, TW;
Chun-yuan Huang, Kaohsiung, TW;
Chung-ken Cheng, Kaohsiung, TW;
Nguyen Nguyen, San Jose, CA (US);
Susheela Narasimhan, San Jose, CA (US);
Alex Horng, Kaohsiung, TW;
Chun-Yuan Huang, Kaohsiung, TW;
Chung-Ken Cheng, Kaohsiung, TW;
Nguyen Nguyen, San Jose, CA (US);
Susheela Narasimhan, San Jose, CA (US);
Sunonwealth Electric Machine Industry Co, Ltd., Kaohsiung, TW;
Abstract
A fan device with improved speed control module includes a stator, a rotor, and a speed control module. The stator has a driving unit outputting currents for the stator to generate alternative magnetic fields and thus turn the rotor. The speed control module includes a control unit and a speed adjusting circuit, with the control unit generating a control command for the driving unit and further outputting a state signal for the speed adjusting circuit to control whether a PWM signal enters the control circuit or not.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile