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:
Jan. 11, 2011
Filed:
Dec. 04, 2007
Jian NI, Shanghai, CN;
Lijian Wu, Shanghai, CN;
Wanbing Jin, Shanghai, CN;
Jianping Ying, Shanghai, CN;
Shih-ming Huang, Taoyuan County, TW;
Wen-shi Huang, Taoyuan County, TW;
Jian Ni, Shanghai, CN;
Lijian Wu, Shanghai, CN;
Wanbing Jin, Shanghai, CN;
Jianping Ying, Shanghai, CN;
Shih-Ming Huang, Taoyuan County, TW;
Wen-Shi Huang, Taoyuan County, TW;
Delta Electronics, Inc., Taoyuan Hsien, TW;
Abstract
A controller of a brushless DC electric machine having a rotor and at least a stator winding powered by a driving voltage is provided. The controller includes a position sensor, an advance angle control circuit, and a driving circuit. The position sensor is moved along a reverse rotating direction of the rotor by a prepositioned angle for outputting a position signal. The advance angle control circuit receives the position signal and a driving voltage reproduction signal reproduced from the driving voltage and outputs a commutation control signal lagging the position signal by a first delay time. The driving circuit receives the commutation control signal for outputting a driving signal for controlling a commutation of the brushless DC electric machine.