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. 28, 2017
Filed:
Sep. 16, 2014
Applicant:
Marvell World Trade Ltd., St. Michael, BB;
Inventors:
Yichao Wang, Singapore, SG;
Foo Leng Leong, Singapore, SG;
Assignee:
Marvell World Trade Ltd., St. Michael, BB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01R 25/00 (2006.01); G01D 5/243 (2006.01); G01D 5/14 (2006.01); G01D 5/244 (2006.01); H02P 6/18 (2016.01);
U.S. Cl.
CPC ...
G01D 5/243 (2013.01); G01D 5/14 (2013.01); G01D 5/244 (2013.01); H02P 6/183 (2013.01);
Abstract
A method for identifying a position of a multi-phase brushless motor includes applying a plurality of detection voltage pulses to the motor, each detection voltage pulse corresponding to a respective driving phase of the motor, measuring a time period associated with a current reaching a predetermined current limit for each applied detection voltage pulse, and identifying a driving phase associated with a shortest time period for the current to reach the predetermined current limit.