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. 15, 2016
Filed:
Apr. 03, 2015
Applicant:
Allegro Microsystems, Llc, Worcester, MA (US);
Inventors:
Edward Chappell, Falkirk, GB;
Robert D. Christie, Fife, GB;
James McIntosh, East Lothian, GB;
Peter Morris, Lanark, GB;
Assignee:
Allegro MicroSystems, LLC, Worcester, MA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02H 7/08 (2006.01); H02H 7/122 (2006.01);
U.S. Cl.
CPC ...
H02H 7/08 (2013.01); H02P 29/0241 (2016.02); H02H 7/0844 (2013.01); H02H 7/1227 (2013.01);
Abstract
An isolation circuit is coupled between motor driver half bridge circuits and an electric motor. A motor controller circuit supplies motor drive signals to the motor driver half bridge circuits. The isolation circuit includes transistors coupled in series with the motor windings. Low to medium power diodes are coupled between a reference voltage source and control terminals of the transistors.