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:
Mar. 19, 2013
Filed:
Jul. 07, 2010
Ta-yung Yang, Milpitas, CA (US);
Ta-hsu Huang, Wujie Township, Yilan County, TW;
Chung-hui Yeh, Banciao, TW;
Pei-sheng Tsu, Shulin, TW;
Yi-min Hsu, Taichung, TW;
Shih-jen Yang, Banciao, TW;
Ta-Yung Yang, Milpitas, CA (US);
Ta-Hsu Huang, Wujie Township, Yilan County, TW;
Chung-Hui Yeh, Banciao, TW;
Pei-Sheng Tsu, Shulin, TW;
Yi-Min Hsu, Taichung, TW;
Shih-Jen Yang, Banciao, TW;
System General Corporation, Sindian, Taipei County, TW;
Abstract
A speed-control circuit for a BLDC motor is provided. The speed-control circuit includes a pulse generator, a current source circuit, a filter circuit, an error amplification circuit and a PWM circuit. The pulse generator detects a speed signal of the BLDC motor to generate a pulse signal. The filter circuit is coupled to the current source circuit to generate an average signal. The error amplification circuit receives the average signal and a speed-reference signal for generating a speed-control signal. The PWM circuit generates a switching signal to drive the BLDC motor in response to the speed-control signal. A pulse width of the switching signal is determined by the speed-control signal.