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. 09, 2000
Filed:
Nov. 03, 1998
Applicant:
Inventors:
Assignee:
Denso Corporation, Kariya, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02P / ;
U.S. Cl.
CPC ...
322 59 ; 322 36 ;
Abstract
In a power control system for a vehicle battery charging ac generator that has a switching element for turning on or off field current, the switching element is turned on at a first duty cycle less than a sum of a predetermined value and a value inversely proportional to rotation speed of the ac generator if the rotation speed is higher than a predetermined speed and at a second duty cycle more than 100% if the rotation speed is not higher than the predetermined speed.