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:
Mar. 10, 1998
Filed:
Apr. 04, 1996
Applicant:
Inventors:
Assignee:
Nippondenso Co., Ltd., Kariya, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02P / ;
U.S. Cl.
CPC ...
322 34 ; 322 28 ; 322 20 ;
Abstract
In order to restrain increase in rotor temperature and reduction in field magnetic flux in an AC power generator, advanced-phase currents are supplied to stator windings of a stator via semiconductor switching devices by controlling the semiconductor switching devices during the power generating operation of the power generator. By this control, the advanced-phase currents will increase the field magnetic flux and, accordingly, increases in generated voltage. By reducing a field current to a field winding of a rotor by an amount corresponding to the increase in the power generation output, the temperature increase in the field winding can be reduced.