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:
Jan. 17, 2017
Filed:
Sep. 11, 2012
Daiju Itagaki, Tokorozawa, JP;
Shogo Miura, Tokyo, JP;
Katsuhiko Sekiguchi, Tama, JP;
Satoshi Hirano, Nagoya, JP;
Daiju Itagaki, Tokorozawa, JP;
Shogo Miura, Tokyo, JP;
Katsuhiko Sekiguchi, Tama, JP;
Satoshi Hirano, Nagoya, JP;
KABUSHIKI KAISHA TOSHIBA, Tokyo, JP;
NATIONAL UNIVERSITY CORPORATION NAGOYA INSTITUTE OF TECHNOLOGY, Nagoya-Shi, Aichi, JP;
Abstract
According to one embodiment, the A/D conversion unit includes a ΔΣ modulating device which samples the analog electric quantity provided by the electric power system with a predetermined modulation frequency and outputs a bit stream changing over time of single bit obtained by performing ΔΣ modulation, and the digital operation processing unit includes one or more digital filters which inputs the bit stream from the ΔΣ modulating device and of which frequency characteristics differ according to a type of protection control operation, and one or more operation processing elements which perform different kinds of protection control operation processing, based on the bit stream provided by the digital filter.