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. 14, 1992
Filed:
May. 04, 1989
Applicant:
Inventors:
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02J / ;
U.S. Cl.
CPC ...
322 28 ; 322 25 ; 323282 ;
Abstract
A charging generator output control system for automobiles is disclosed, in which the field current of the generator is controlled by a chopper, an output voltage of the generator is compared with a predetermined target voltage, the difference therebetween is detected, and the duty factor of an output signal of the chopper is controlled in accordance with the difference while at the same time controlling the frequency of an output signal of the chopper in accordance with the duty factor, thus reducing the difference substantially to zero.