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. 14, 2000
Filed:
Mar. 20, 1998
Tadashi Uematsu, Kariya, JP;
Tadatoshi Asada, Anjo, JP;
Denso Corporation, Kariya, JP;
Abstract
A control device for a vehicle alternator having a field coil, and an auxiliary permanent magnet. The control device includes voltage regulator, a generation-condition detecting circuit having a frequency sensor and a comparator for comparing a frequency of the output voltage with a reference value and a power source circuit for supplying electric power to the generation-condition detecting circuit when the output voltage becomes equal to or higher than a voltage that is generated without the field current. The generation-condition detecting circuit allows the voltage regulator to supply the field coil with controlled electric current only when the frequency of the output voltage is higher than the reference value.