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:
Dec. 16, 2014
Filed:
Aug. 09, 2012
Haó-yu Chang, New Taipei, TW;
Pei-cheng Huang, Taipei, TW;
Wei-hsu Chang, New Taipei, TW;
Kuo-chung Lee, New Taipei, TW;
Haó-Yu Chang, New Taipei, TW;
Pei-Cheng Huang, Taipei, TW;
Wei-Hsu Chang, New Taipei, TW;
Kuo-Chung Lee, New Taipei, TW;
Richtek Technology Corp., Chupei, Hsinchu, TW;
Abstract
A method and apparatus for dynamically adjusting a dead time of a BLDC motor during a phase change detect the winding current of the BLDC motor during the dead time, and terminate the dead time when the winding current is detected to be substantially or close to zero. Thus, the method and apparatus can optimize the dead time and switch the BLDC motor between two phases at a zero-current point, without reducing the maximum rotation speed of the BLDC motor.