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:
Nov. 01, 2011
Filed:
May. 14, 2009
Ta-yung Yang, Milpitas, CA (US);
Yi-min Hsu, Taichung, TW;
Pei-sheng Tsu, Taipei County, TW;
Chung-hui Yeh, Taipei County, TW;
Shih-jen Yang, Taipei County, TW;
Ta-Yung Yang, Milpitas, CA (US);
Yi-Min Hsu, Taichung, TW;
Pei-Sheng Tsu, Taipei County, TW;
Chung-Hui Yeh, Taipei County, TW;
Shih-Jen Yang, Taipei County, TW;
System General Corporation, Sindian, Taipei County, TW;
Abstract
A BLDC (brushless direct current) motor system of the present invention includes a control circuit, a sequencer, a driving circuit, and a BLDC motor. The control circuit comprises a speed-feedback loop and a torque-feedback loop to control the maximum speed and the maximum torque of the BLDC motor in parallel configuration. The speed-feedback loop generates a speed-control signal. The torque-feedback loop generates a torque-control signal. A PWM circuit receives the speed-control signal and the torque-control signal to generate a PWM signal. A pulse width of the PWM signal is correlated to the level of the speed-control signal and/or the level of the torque-control signal.