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:
Apr. 01, 2014
Filed:
Mar. 19, 2010
Ronghua BI, Zhongshan, CN;
Yong Zhao, Zhongshan, CN;
Ronghua Bi, Zhongshan, CN;
Yong Zhao, Zhongshan, CN;
Zhongzshan Broad-Ocean Motor Co., Ltd., Zhongshan, CN;
Abstract
A method for controlling a brushless DC motor, comprising transmitting a phase-inversion signal to a motor control unit by a rotor position detecting unit after a motor enters a stable state, advancing or delaying phase shift by the motor control unit at an offset electrical angle, recording and comparing phase current values Iat different offset electrical angles whereby obtaining an optimum offset angle αcorresponding to the minimum phase current value I, and advancing or delaying phase shift by the motor at the optimum offset angle α. As the motor enters a stable state, the motor advances or delays phase shift at the optimum offset angle α, at this time operating current of a coil winding of the motor is the minimum, which saves power and reduces cost.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile