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. 23, 2014
Filed:
Aug. 30, 2012
Applicants:
Timothy Reynolds, Westborough, MA (US);
Chengyi Jin, Wayland, MA (US);
Inventors:
Timothy Reynolds, Westborough, MA (US);
Chengyi Jin, Wayland, MA (US);
Assignee:
Allegro Microsystems, LLC, Worcester, MA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02P 6/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A motor control circuit and associated techniques detect a zero crossing of a current in a motor winding by detecting a reverse current in a half bridge circuit used to drive the motor winding.