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:
Jun. 02, 2009
Filed:
Mar. 13, 2007
Jao-ching Lin, Taipei, TW;
Lin-abel Chu, Taipei, TW;
You-kang Lin, Taipei, TW;
Cheng-chung Tsau, Taipei, TW;
Chung-yi Shen, Taipei, TW;
Jao-Ching Lin, Taipei, TW;
Lin-Abel Chu, Taipei, TW;
You-Kang Lin, Taipei, TW;
Cheng-Chung Tsau, Taipei, TW;
Chung-Yi Shen, Taipei, TW;
Sentelic Corporation, Hsin Chuang, Taipei Hsien, TW;
Abstract
A method capable of controlling brushless DC motor detects the magnetic pole positions of the rotor with a Hall component to produce a Hall signal correspondingly, generates a PWM signal based on an external control signal with a PWM generator, controls a switch circuit based on the PWM signal and the Hall signal with a driver such that switched output is capable of being sent to the current phase of the stator coils for rotating the rotor. Further, while the Hall signal is detected to be level-switched, the external control signal level increases or decreases corresponding to change of the level of the Hall signal with respect to the duty cycle of the PWM signal being controlled to increase to the preset duty cycle from 0 or to decrease to 0 from the preset duty cycle for eliminating both sharp wave in the current during switching and noise.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile