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. 17, 2019
Filed:
Nov. 05, 2018
Applicant:
Microsemi Soc Corp., San Jose, CA (US);
Inventors:
Battu Prakash Reddy, Hyderabad, IN;
Ashwin Murali, Hyderabad, IN;
Assignee:
Microsemi SoC Corp., San Jose, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
H02P 21/22 (2016.01); H02P 25/03 (2016.01);
U.S. Cl.
CPC ...
H02P 21/22 (2016.02); H02P 25/03 (2016.02);
Abstract
A method for controlling the drive current in a stepper motor includes measuring stepper motor current, computing a load angle of the stepper motor, calculating a torque ratio of the stepper motor, generating a reference current as a function of the torque ratio and a maximum current setting for the stepper motor, and setting the drive current of the stepper motor as a function of the reference current.