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:
May. 12, 2009
Filed:
Aug. 23, 2006
Kenji Kamimura, Saitama, JP;
Koichi Asai, Saitama, JP;
Kazufumi Muronoi, Saitama, JP;
Honda Motor Co., Ltd., Tokyo, JP;
Abstract
An output voltage regulator for an engine-driven generator that can satisfactory suppress fluctuation in output voltage, even when an output waveform of the generator is distorted. An engine revolution period that represents a period of output voltage is detected by use of an ignition signal. Data that represents an output waveform is obtained by squaring and adding up an instantaneous value of the output voltage for one period of engine revolution. Furthermore, a square root of the data is extracted as an effective value. An operation duty of a transistor Qprovided in an output circuit of an excitation winding Lthat supplies a field current 'if' is determined based on a difference between the effective value and a target voltage. The field current 'if' changes according to the difference, and the output voltage is thereby regulated according to a load.