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. 06, 2004
Filed:
Aug. 07, 2001
Applicant:
Inventors:
Tadatoshi Asada, Anjo, JP;
Kazuyuki Watanabe, Kariya, JP;
Assignee:
Denso Corporation, Kariya, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02H 7/06 ; H02P 1/100 ; H02P 4/00 ;
U.S. Cl.
CPC ...
H02H 7/06 ; H02P 1/100 ; H02P 4/00 ;
Abstract
A voltage regulator is comprised of a semiconductor element for controlling current supplied to a field coil, a flywheel element, a generation voltage regulation circuit for controlling the semiconductor element, and a switching capacity control circuit for controlling a current-switching capacity during a former stage of a turn-off transition period of the semiconductor element to be larger than that during the latter stage of the turn-off transition period. Accordingly, the current change rate can be reduced, so that surge voltage and electro-magnetic wave can be reduced.