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:
Jun. 17, 2008
Filed:
Aug. 12, 2004
Applicant:
Hiroshi Kushihara, Nagano-ken, JP;
Inventor:
Hiroshi Kushihara, Nagano-ken, JP;
Assignee:
Tamagawa Seiki Kabushiki Kaisha, Nagano-ken, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03M 1/48 (2006.01);
U.S. Cl.
CPC ...
Abstract
To achieve miniaturization of a resolver apparatus as a system, to obtain the resolver apparatus at a low cost, and to improve failsafe by installing an abnormality detection unit and a self-diagnosis circuit within the R/D converter. According to the present invention, an abnormality detecting method for an R/D converter in a resolver apparatus includes detecting abnormalities of at least the resolver itself (), a cable wiring () through which the resolver () and the R/D converter () are connected to each other, and the R/D converter () itself by an abnormality detection unit () provided in the R/D converter ().