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. 16, 2003
Filed:
Jun. 18, 2001
Applicant:
Inventor:
Hiroyoshi Misumi, Kanagawa, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02P 8/00 ;
U.S. Cl.
CPC ...
H02P 8/00 ;
Abstract
A motor driving control apparatus for driving a motor repeats alternately the supply of current to the motor coil during the exciting period and the non-supply of current to the motor coil during the non-exciting period. For this apparatus, a short period is set to enable each of the feeding points of the motor coil to be short-circuited totally during the non-exciting period, and an open period is set to enable each of the feeding points to be totally in the open status during the open period.