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:
Apr. 21, 2009
Filed:
Aug. 02, 2005
Applicants:
Shuichi Otsuka, Miyota, JP;
Eric Hardt, Tempe, AZ (US);
Inventors:
Shuichi Otsuka, Miyota, JP;
Eric Hardt, Tempe, AZ (US);
Assignee:
Minebea Co., Ltd., , JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02P 25/08 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method and apparatus is disclosed for generating a drive signal that is applied to a coil in a motor. The drive signal is applied during a period (commutation period) between a commutation event and the immediately following commutation event when the coil is energized. The drive signal comprises pulses which vary over the duration of the commutation period.