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:
Dec. 30, 2014
Filed:
Oct. 13, 2011
Shigetoo Oda, Tokyo, JP;
Shigetoo Oda, Tokyo, JP;
Mitsubishi Electric Corporation, Chiyoda-Ku, Tokyo, JP;
Abstract
A protection control apparatus includes a control-signal output circuit configured to generate a sampling signal in synchronization with a 1PPS signal and output, as a control signal, data numbers cyclically counted up every time the sampling signal is generated and the sampling signal and a data output unit configured to convert a system electrical quantity into digital data based on the control signal and output the digital data. The control-signal output circuit includes a number-of-clocks calculating circuit configured to calculate a second number of clocks and a third number of clocks and a synchronization control unit configured to calculate a difference between a first number of clocks and a second number of clocks, control a cycle of the sampling signal based on the difference and the third number of clocks, and synchronize generation timing of the sampling signal with the 1PPS signal.