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:
Oct. 04, 2011
Filed:
Sep. 29, 2008
Applicants:
Christopher C. Chang, Brentwood, CA (US);
Edward LI, Culver City, CA (US);
Thomas Judge, San Leandro, CA (US);
Inventors:
Christopher C. Chang, Brentwood, CA (US);
Edward Li, Culver City, CA (US);
Thomas Judge, San Leandro, CA (US);
Assignee:
Arcus Technology, Inc., Livermore, CA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H02P 8/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A stepper motor device uses compensating non-sinusoidal driving values to compensate for operational non-sinusoidal drive characteristics of a motor of the device due to at least design and manufacturing imperfections in the motor. The compensating non-sinusoidal driving values may be derived using back electromagnetic force produced from the motor or using measured rotational positions of the motor when the motor is driven using known driving values.