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. 16, 2013
Filed:
Aug. 31, 2010
Yasuhiro Nakada, Saitama, JP;
Minoru Maedako, Saitama, JP;
Kenji Kamimura, Saitama, JP;
Honda Motor Co., Ltd., Tokyo, JP;
Abstract
A generator () includes a generator winding () and an excitation winding (), and a field winding (). To converge an output voltage of the generator winding () to a target, a field current is varied by increasing/decreasing an energization duty ratio of a switching device () connected to the field winding (). In a duty ratio zero determination unit () and a duty ratio zero continuation determination unit (), when an output duty ratio continues for a predetermined time with duty ratio zero, a duty ratio increase amount restriction unit () restricts an upper limit of the duty ratio to a predetermined upper limit when the field current increases. A duty ratio restriction unit () for restricting the duty ratio by a maximum value determined based on a voltage of a smoothing capacitor () in place of the determination of the duty ratio being zero may be provided.