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:
Apr. 09, 2013
Filed:
Dec. 19, 2011
Chun-lung Chiu, Taoyuan Hsien, TW;
Ming-shi Tsai, Taoyuan Hsien, TW;
Po-tsun Kuo, Taoyuan Hsien, TW;
Chung-hung Tang, Taoyuan Hsien, TW;
Chun-Lung Chiu, Taoyuan Hsien, TW;
Ming-Shi Tsai, Taoyuan Hsien, TW;
Po-Tsun Kuo, Taoyuan Hsien, TW;
Chung-Hung Tang, Taoyuan Hsien, TW;
Delta Electronics, Inc., Kuei San, Yaoyuan Hsien, TW;
Abstract
A motor control apparatus and a motor control method determine whether the motor is in a back-pressure area so as to provide different rotation-speed control signals. When the fan is in the low duty cycle, a first circuit loop is switched on, so that the fan has more accurate rotation speed. When the fan is in the high duty cycle, a second circuit loop is switched on, so that the rotation speed of fan does not be limited to a constant rotation-speed as the fan enters the back-pressure area. Thus, the fan has larger airflow quantity and higher airflow pressure.