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. 10, 2017
Filed:
Jan. 17, 2013
Applicant:
Marvell International Ltd., Hamilton, BM;
Inventors:
Ravishanker Krishnamoorthy, Rivervale Crest, SG;
Foo Leng Leong, Bukit Timah, SG;
Assignee:
Marvell International Ltd., Hamilton, BM;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G05B 11/28 (2006.01); H02P 6/00 (2016.01);
U.S. Cl.
CPC ...
H02P 6/002 (2013.01);
Abstract
Systems and methods to eliminate current surge during spindle spin up, include, in at least one aspect, a method including: using a duty cycle with a spindle motor to spin-up the spindle motor to achieve a steady-state operating speed for the spindle motor, wherein the spindle motor comprises phase windings; and using an adjusted version of the duty cycle for a period during the spin-up to reduce current surge onto a supply capacitor associated with the spindle motor during phase switching for the phase windings.